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250-924 exam Dumps Source : Data Protection Troubleshooting for Windows using NetBackup 5.x
Test Code : 250-924
Test name : Data Protection Troubleshooting for Windows using NetBackup 5.x
Vendor name : Symantec
: 130 real Questions
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Symantec Data Protection Troubleshooting for
if you befall to're traveling, inns are alleged to exist your area of refuge. in any case, it feels comforting to own a comfy and touchstone spot of rest in a brand new vicinity.
no matter if they treasure it or not, they spot a fine deal of own assurance in go staff to offer protection to or privacy. They depart their belongings out whereas housekeeping tidies up, they believe the elbowroom is free of bugs, and they are expecting hotel staff now not to undercover agent on us with hidden cameras. in many methods, motels set us on the lenity of their hosts.
however how about digital believe? accomplish they weigh on hotels to give protection to their digital privateness the very means as their actual privateness? as it seems, data protection is not an blanketed facility for many lodge chains.
vacation condominium properties may additionally own a creepy hidden cam difficulty
How accomplish lodges leak personal statistics online
A anatomize launched through Symantec, makers of the famed antivirus program, revealed that two out of three inn sites own accidentally leaked reserving details and private information to 3rd parties.
resorts exhaust web-primarily based reserving capabilities to gain reservations extra effortless for visitors and more straightforward for employees. Managing guest statistics, including passport assistance, email addresses, credit cards and entire names, is a agreeable deal more straightforward if you befall to harness a digital database to accomplish the heavy lifting.
despite the fact, as a result of these databases receive counsel through an online connection, this makes them as susceptible as anything online to hackers and putrid actors.
according to Symantec's analyze, data compromises usually turn up when inns e-mail your booking affirmation back to you. This statistics, for many lodge chains, isn't encrypted or hosted in a cozy place.
in fact, the records is regularly shared with third-birthday celebration provider providers corresponding to social networks love facebook and advertisers throughout the cyber web. The intent, interestingly, is to tailor ads to your commute wants and location. a probable story, as always.
Will I exist affected by inn statistics leaks?
as it stands, Symantec reviews that cybercriminals are typically attracted to excessive-ranking company gurus and government employees. These sorts of aims customarily own better value counsel or expense compass to compromise, so commonplace travelers and pleasure-seekers don't seem to exist a precedence for criminals concentrated on motels.
That being stated, there are some finest practices that you may assume to maintain your records cozy when booking resorts as well as traveling overseas. For starters, making confident you aren't logged in to facebook whilst you ebook tickets prevents any transmission of statistics to its servers by passage of unsecured connections.
in any other case, booking your rooms while in a personal browser window (like Chrome's Incognito Mode) will at the least halt current ad trackers from making the hyperlink between your reserving and your other looking habits.
When it involves receiving affirmation for your reserving, a agreeable suggestion would exist to gain an option e-mail address that you just exhaust best for Go back and forth linked exchanges. This e-mail tackle may furthermore exist reduce slack your main account and would not must consist of own counsel in the settings love your name and address.
Your countenance is your key at this new high-tech lodge
the exhaust of a lodge booking provider is furthermore a agreeable idea, however these sites can furthermore exist hit and miss when it involves privateness. in case you e-book through a provider love resorts.com or one in bar nonexistent its opponents, exist unavoidable to study the web page's privateness policy so you understand how your records is being dealt with.
a safe region to dwell?
given that cybersecurity is fitting an ever-existing theme for agencies, inn chains are within the procedure of complying to facts defense legal guidelines enacted by governments. The eu lately handed the well-known information protection regulation, which a few lodges declare their systems will soon exist compliant with.
until they know for unavoidable that their hosts own their optimal digital interests in intellect, the best thing you as a vacationer can accomplish is exist privy to your online presence. accomplish not simply examine even if your lodge elbowroom looks satisfactory or low in cost.
The first-rate of a hotel's website can exist a telltale mark of a protection risk. If the web page you are reserving through looks defunct or sketchy, it really is a purple flag for unsecured connections.
web site caught secretly live-streaming hotel guests
security cameras can furthermore exist extraordinarily helpful for shielding your domestic and making you consider comfortable. however, as it turns out, they can own a depressing side. currently, it changed into establish out that a website became live streaming people whereas they were having private moments of their inn rooms. This narrative will give you the heebie-jeebies.
click or tap to learn the passage they acquired away with it for so long and the passage they got caught.
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outdated happening Now
the passage to preorder a Galaxy Fold mobilephone
subsequent happening Now
New listing names worst companies for statistics privateness
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Symantec Corp. is set to dramatically expand its cell safety choices this week, including VPN (virtual private network), statistics encryption, antispam and other features.
The enterprise will unveil on Monday its first suite of security utility for Microsoft Corp. home windows cell instruments. to this point Symantec has best offered antivirus application for windows mobile and a suite of antivirus and firewall for Symbian, stated Paul Miller, managing director of cell and instant at Symantec. The suite is known as Symantec mobile protection Suite 5.0, to fitting the upcoming version 5.0 of the business’s suite for the Symbian OS. Symantec plans to present off the new application at the CTIA instant pomp in Orlando.
companies are becoming greater concerned about cellular protection as they set sensible phones and other handheld contraptions within the palms of roving worker's. meanwhile, they're faced with an array of laws on the coping with of statistics, and some high-profile losses of deepest guidance in the container own made cell records insurance policy a scorching theme matter. Symantec goals to prolong the equal kind of coverage it gives PCs.
computing device viruses dwarf the variety of threats geared toward cellular contraptions these days, so businesses haven’t considered as a noteworthy deal of a necessity for protection on them, Miller noted. but when left unguarded, handsets could become attackers’ subsequent fundamental direction into enterprise networks, he pointed out. So Symantec has added new outfit to cozy instruments whereas they’re getting used and mixed these with features to evade statistics loss if they are misplaced or stolen.
businesses could exist able to encrypt every thing on a handheld device and its storage playing cards, or just selected files, the usage of 256-bit AES (superior Encryption commonplace) encryption. either way, entry to the statistics is blanketed by the exhaust of a username and password when starting the device or trying to entry the encrypted folder, Miller observed. The antivirus factor keeps users from gaining access to contaminated data and lets administrators continuously scan devices. The antispam function can limpid out and delete spam textual content messages, Symantec stated.
additionally included are an IPSec (internet Protocol safety) VPN, a device for retaining contraptions that don't seem to exist compliant with guidelines off the community, and a mechanism for protecting personnel from the usage of chosen points of a device.
If a device falls into the incorrect hands, administrators can wipe off the records remotely or set it up so the facts is eradicated after a unavoidable number of password tries. The suite additionally comprises an audit log feature that continues song of activity on the outfit so the enterprise can remark everything that came about after it fell out of the worker’s arms, Miller observed.
one of the vital technology within the suite, essentially VPN and encryption, is licensed from BlueFire safety technologies, in response to Symantec spokesman Brian Modena.
The suite is scheduled to turn into purchasable in may via Symantec and enterprise resellers and gadget integrators. cell operators may additionally additionally promote the suite as optional or touchstone facets on devices, or on a monthly service basis, Miller observed. A consumer version of the suite, referred to as Norton cellular protection 5.0 for windows mobile, is due in the identical time frame. The suite is priced at CDN$93.00 per device.
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even though the 30%-plus decline seen in Symantec's (SYMC - accept file) shares on Friday has a lot to accomplish with the audit committee probe it just disclosed, it exist with the aid of no potential the most efficacious factor.
Disappointing tips for the company's commercial enterprise safety utility and services commerce is additionally weighing, and it does a entire lot to elevate fresh questions about the business's standing in a really competitive IT security market.
After the bell on Thursday, Symantec mentioned March quarter (fiscal fourth quarter) profits of $1.23 billion and non-GAAP EPS of $0.forty six, beating consensus estimates of $1.19 billion and $0.39. The company's commerce safety salary rose 1% yearly to $620 million after adjusting for currency swings and the Oct. 2017 sale of Symantec's web page safety certificates enterprise. Its client Digital safety income rose 6% to $614 million after adjusting for outlandish exchange and the Feb. 2017 acquisition of id theft-coverage firm LifeLock.
however Symantec furthermore guided for June quarter profits of $1.135 billion to $1.one hundred sixty five billion and EPS of $0.31 to $0.35, beneath a consensus of $1.18 billion and $0.forty one. And it guided for fiscal 2019 (ends in March 2019) salary of $four.76 billion to $four.9 billion and EPS of $1.50 to $1.sixty five, beneath a consensus of $four.ninety three billion and $1.80.
Of path, the outlook is being overshadowed birthright now with the aid of Symantec's disclosure that its board's audit committee "has commenced an inner investigation in connection with issues raised by passage of a former worker."
The company adds the audit committee "has retained unbiased counsel and other advisors" to aid its investigation, that its effects and counsel "could exist province to alternate in line with the result of the Audit Committee investigation" and that it exist not going that the probe will exist comprehensive in time for Symantec to file its fiscal 2018 annual report "in a well timed manner."
Symantec's inventory plunged greater than $9 to below $20 following the news. Shares are actually at their lowest degrees when you consider that mid-2016, and are furthermore returned at degrees first reached in 2004. at least eight sell-facet research corporations own issued downgrades.
while or not it's handy to spot the entire fault for this on a whistleblower probe whose consequences could very smartly exist critical, to accomplish that can exist to let Symantec off the hook for income tips that appears fairly disappointing. primarily when one appears at the specifics.
On its profits name, which primarily featured no doubt-and-reply session, Symantec referred to its counsel implied flat June quarter and monetary 2019 profits boom on an biological groundwork. It additionally forecast that commercial enterprise security salary could exist down through 2% on an organic foundation in fiscal 2019, and an unspecified percentage within the June quarter. This may exist offset via modest biological for the purchaser Digital safeguard phase, which closing quarter offset a small subscriber decline by means of becoming its commonplace salary per user (ARPU).
In a vacuum, the commercial enterprise protection assistance would already parade vulnerable. but it looks worse when one remembers that corporate IT spending has been fairly extraordinary this yr, with rather just a few massive-identify enterprise tech firms posting solid revenue reports. And it looks worse nonetheless when one remembers that safety spending continues growing sooner than IT spending in frequent, as commercial enterprise terrified of being the next victim of an incredible records infringement gain log off on great investments in community, endpoint and cloud security products.
For a long time, there became optimism among buyers that Symantec might hold its personal in this atmosphere, however its organic commerce security growth wasn't precisely stellar. The business's $4.65 billion 2016 buy of peer Blue Coat (an mammoth player in the secure web gateway hardware/application market) became smartly-obtained, and a salesforce restructuring performed closing 12 months gave the imprint to exist paying dividends.
however's secure to negate that a agreeable deal of this optimism is long past following Symantec's latest information, which implies the commerce will lose significant commerce partake between now and March 2019. BTIG's Joel Fishbein, who downgraded Symantec to neutral final nighttime, says the outlook makes his firm sensation "what, past accounting alterations, is happening in the [Enterprise Security] company."
From the outside searching in, it looks as if an absence of focus may exist hurting Symantec. The company's security product line is massive, protecting everything from gateways to email encryption to malware evaluation to forensics to risk analytics. This puts Symantec in competitors with many security pure-performs that own been becoming swiftly (feel Palo Alto Networks (PANW - accept report) or Proofpoint (PFPT - accept document) ), as neatly because it giants who own made turning out to exist security revenue an immense precedence (think IBM (IBM - accept document) or Cisco methods (CSCO - accept record) ).
might exist making the circumstance worse: there has been a deluge of funding for safety tech startups in recent years -- startups who had been using that capital to aggressively rent salespeople and compete for commercial enterprise offers. This year has already considered two fantastic protection tech IPOs -- Zscaler (ZS and Carbon Black (CBLK -- and greater are probably on the manner.
There don't seem to exist any effortless fixes that Symantec can keep to spot its commerce protection company on greater footing in this kind of competitive environment. And the undeniable fact that management has to cope with an audit committee probe whereas it looks for answers is unavoidable to gain things even more durable.
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Data Protection Troubleshooting for Windows using NetBackup 5.x
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Quest Software outlined to its solution provider partners some upcoming changes to its data protection software which involves gradually bringing its two primary solutions together as partake of a unique platform
Quest unveiled its plans as partake of the company's annual channel confederate conference, held this week in Dana Point, Calif.
John Maxwell, vice president of product management, outlined a roadmap for Quest's data protection software that includes perpetual upgrades of its vRanger and NetVault storage offerings while gradually bringing them together into a unique scalable data protection platform.
Quest in early 2008 acquired Vizioncore, which developed vRanger, which provides a comprehensive data protection platform for VMware virtualized environments.
Quest followed that up with the acquisition late eventual year of data protection software vendor BakBone, developer of the NetVault backup and recovery offering for physical IT infrastructures.
Going forward, Maxwell said, Quest plans to add physical infrastructure backup capabilities from NetVault to vRanger while adding vRanger's virtual infrastructure capabilities to NetVault. Eventually the two will arrive together as partake of a unique platform with a common management architecture while quiet being available as sever products for customers with specific requirements, he said.
Quest this month plans to release vRanger 5.3, which will arrive with target-based dedupe technology from NetVault. That technology, SmartDisk, will exist available to vRanger customers for $945 per instance, and can reduce file sizes by a factor of 10:1 to 70:1, Maxwell said.
"It can scale for customers backing up several petabytes of data, but at a unique flat price," he said. "You can Go to a customer and negate you can offer an attractive dedupe offering, and then wrap your hardware and services. This is exciting. No one in this environment has enterprise-class dedupe priced at $945 per instance. And most customers only necessity one instance."
vRanger 5.3 will furthermore feature increasingly tighter integration with VMware, Maxwell said. vRanger 5.2 was the first backup software to advocate VMware's vSphere 5, and vRanger 5.3 will exist the first to advocate the VMware vStorage Virtual Machine File System (VMFS), a high-performance cluster file system for managing virtual machines.
vRanger 5.3 will furthermore allow users to search for data in virtual machines, Maxwell said. "No longer will customers necessity to know which VM data sits on," he said.
Early next year, vRanger will furthermore start supporting physical storage backup devices, including tape, he said.
Quest is planning to offer major upgrades to NetVault every six months or so, Maxwell said.
NetVault will advocate more heterogeneous environments in the future, including virtualized server environments. "We won't just advocate Hyper-V and VMware virtual machines in a stand-alone fashion," he said. "Next year, you will exist able to restore Hyper-V data into a VMware VM, and VMware data into a Hyper-V VM."
Next year will furthermore remark Quest integrate NetVault as the data protection backbone for its Recovery Manager technology for managing Microsoft applications including Exchange, SharePoint, and Windows Server energetic Directory, as well as with its LiteSpeed technology for managing Oracle and SQL databases, Maxwell said.
Maxwell furthermore introduced the Quest Unified Data Protection, or QUDP, platform, which next year will bring vRanger, NetVault, Recovery Manager, and LiteSpeed into a common platform with a unique management interface across heterogeneous physical and virtual environments and through the cloud.
Next: Bringing NetVault, vRanger Together
NetVault and vRanger will become plug-ins to QUDP, Maxwell said.
"Quest is the only company to allow customers from the smallest to the largest to exhaust the very technology, or to grow their technology as their commerce grows," he said. "Symantec? They own Backup Exec and NetBackup, and those two don't talk to each other."
Walter Angerer, senior vice president and universal manager for Quest's data protection business, said that by going with a platform approach, Quest makes it easier to protect customer and confederate investments in data protection as customer data grows.
"For partners, once the platform is in place, the customer learns one set of problems and how to configure protection, and will not own to retrain," Angerer said.
Maxwell furthermore said that Quest, with its planned enhancements to its data protection software, is ready to aid its solution providers differentiate themselves from the competition.
"Let's exist frank," he said. "Do you want to exist just another Symantec reseller? That's a commoditized offering, and maybe gives you 7 or 8 percent margins."
Quest, on the other hand, has invested to heavily in helping partners exist successful.
For instance, thanks to investments in demand generation, about 60 percent of vRanger sales arrive from the 30,000 search engine hits the software gets every months. "We are getting the word out to the market that they are a viable vendor to toil with," he said.
Quest is furthermore investing heavily in confederate training, which Maxwell said is Important as more of the data protection commerce goes to virtualized environments and the cloud.
"If you don't know what a VMDK or ESXi or other acronyms are, you necessity to learn," he said. "Some other reseller out there knows what they mean."
Maxwell said that Quest furthermore knows that it is quiet a relatively small competitor when compared to companies love Symantec and EMC, and so it is developing strategic partnerships with other vendors to address more opportunities.
For instance, he said, Quest is one of two data protection software vendors to tie its dedupe software with EMC's Data Domain dedupe hardware appliances. "So if a customer chooses a hardware centric approach to dedupe, we'll advocate it," he said. "If they want a software approach, we'll provide it."
Angerer said that if a customer is set on buying Data Domain, a Quest solution provider should not fight the choice.
"Such a customer wants a high-end solution," Angerer said. "But on the other hand, they provide a noteworthy dedupe solution. If the customer buys Data Domain, it is not looking at a lower-cost alternative. So don't fight them."
Nicolas Heisdorffer, enterprise technology sales manager for Alliance Technologies, a Des Moines, Iowa-based solution provider and Quest Software partner, said he is impressed at how the vendor is folding its NetVault data protection software in with its other products.
"Two years ago, they asked Quest to aid us with a unified message about its products," Heisdorffer said. "And now they're doing it. It's bar nonexistent about taking a complex environment and adding simplified technology around it."
Quest has become the largest $800 million company no one ever heard of, Heisdorffer said.
"Quest is pile a noteworthy narrative around data protection," he said. "It's taking what can exist a complicated problem, and solving it by bringing data protection, deduplication, and continuous data protection together into a solution."
Next: Quest For A Complete Solution
Heisdorffer cited Quest's aptitude to provide bare metal recovery of customers' applications to hardware that is different from the servers on which those applications originally ran, or the aptitude to recoup a virtual machine to a different hypervisor, as examples of pile solutions that appeal to bar nonexistent potential customers.
"At one time in the past, no one would own thought that Oracle databases and SQL databases would exist establish in the very enterprise," he said. "Now it's common. I'm convinced Microsoft will enmesh up to VMware in virtualization as well."
Saelig Company Inc. has introduced the Alldaq ADQ-USB 3.0-ISO succession of USB 3.0 isolators, which advocate the replete USB 3.0 SuperSpeed data rate of 5Gbit/s. This allows USB 3.0 SuperSpeed devices to exist electrically isolated from a host PC or other peripherals at replete performance. The re-clocking design guarantees a stable USB connection at bar nonexistent speeds. The ADQ-USB isolators can exist used for the electrical isolation of USB measurement instruments to avoid ground loops to solve problems in industrial and automotive applications as well as in professional sound studios and event and present equipment.
The ADQ-USB 3.0-ISO isolators automatically detect SuperSpeed (5Gbit/s), High-Speed (480Mbit/s), Full-Speed (12Mbit/s) or Low-Speed (1.5 Mbit/s) connections. The model ADQ-USB 3.0-ISO-PS includes a +5 V power adapter with a lockable 5.5mm barrel connector (bayonet lock) for a safety. For industrial and automotive applications, the ADQ-USB 3.0-ISO-W version can accept 10 to 36 VDC from an external power source via a 2-pin lockable Phoenix-type connector to power devices with up to 900 mA. The external power input is protected against reverse polarity and short-circuits.
The isolation voltage between PC and USB device is 1kV (continuous) for the model ADQ-USB 3.0-ISO-PS and 1.0kV (< 60s) for the model ADQ-USB 3.0-ISO-W. The ESD protection of the data lines is ensured by transient-voltage-suppression diodes up to ±12kV (contact discharge) and ±15kV (air-gap discharge) according to IEC 61000-4-2. Without an external power supply the USB isolator can source up to 200mA at the device port. For USB devices requiring more current, the external power supply version ADQ-USB 3.0-ISO-W can provide 900 mA according to the USB 3.0 specification. The Alldaq USB 3.0 isolators are compatible with Windows, MAC OS and Linux systems, and downward-compatible with USB 2.0/1.1/1.0 equipment.
Housed in a robust aluminum housing with rubber bumpers and designed for an operating temperature from -20 to +70degC, the Alldaq USB 3.0-ISO isolators are suitable even for applications in harsh environments. An optional DIN rail mounting kit is furthermore available for permanent installations.
The ADQ-USB 3.0-ISO can protect computers and USB devices effectively against interference voltages, while furthermore eliminating ground loops. Typical applications include: electrical isolation between measurement instruments and PCs, rejection of ripple pickup in studio equipment, removing differing ground potentials in industrial control equipment, and protection against voltage peaks in automotive set-ups.
Compact in size (3.6" x 2.5" x 1.3" - L x W x H incl. rubber bumpers) and weight (4.5oz) the ADQ-USB 3.0-ISO succession of USB3.0 isolators are made in Germany by Alldaq, a prominent manufacturer of a wide compass of measurement solutions for exhaust in industry, research, servicing, and education; they are available now from Saelig Company, Inc. Fairport NY.
This chapter, from Upgrading and Repairing Networks, 5e, looks at the network's ratiocinative and physical design to assist your planning when creating a new network.
This chapter is from the bespeak
Many types of networks were discussed in Chapter 1, "A Short History of Computer Networking," from ARPANET to TCP/IP. And in Chapter 2, "Overview of Network Topologies," you scholarly about the various topologies you can employ when designing and creating a local area network (LAN), and they furthermore looked at some scenarios in which several networks were connected to contour a wide area network (WAN). In this chapter, they will keep at another aspect of creating a network: the network's ratiocinative and physical design. The physical aspects of your LAN will depend on the underlying physical transport technology—Ethernet or Token-Ring, for example, or possibly ATM, which is supported as a LAN protocol in products such as Windows 2000/XP, Windows Server 2003, and Linux. Depending on which technology you use, there will exist one or more LAN topologies from which to choose.
Before you can launch to design a physical network, however, you first must determine your needs. What services must you provide to your user community? What are the resources you'll need? If you own to compromise, what will it assume to meet the most users or to provide the more Important services? You then will own to assume into account network protocols, applications, network speed, and, most important, network security issues; each of these figures into a network's ratiocinative design. Another Important factor your management will probably oblige you to consider is cost—you can't forget the budget. These factors gain up the ratiocinative design for your network. You first should elect what you necessity and what it will assume to provide for those needs.
If you are creating a new network and purchasing new applications, you will probably disburse most of your time considering the licensing and other monetary costs (training users, network personnel, and so on). If you are upgrading older applications, several other factors arrive into consideration. Many applications that were coded using COBOL, BASIC, FORTRAN, and other languages that helped jumpstart the computer age may own built-in network functionality based on older proprietary network protocols. If this is the case with your network, you own to consider several things. What will it cost to update thousands of lines of code (or more) to more modern versions of the very programming language? What will it cost to upgrade these programs to newer object-oriented languages? To reclaim money, can you upgrade partake of your network and exhaust gateway hardware/software to connect to older network components?
Because of the costs associated with coding applications that were created many years ago, and the expenses that will exist required to update them to modern programming languages, you may exist forced to maintain legacy applications for a few years while replacement applications are designed and created. You may find a packaged application that can exist used to replace older programs. This problem will apply mostly to proprietary computer architectures, instead of Windows or Unix platforms. If you can simply gain minor changes and compile the source code so that it will hasten on a newer operating system, your costs will exist much less than if you own to re-create the applications your users necessity from scratch. Another cost associated with upgrading to new programs is training users and help-desk personnel.
When you draw a ratiocinative network design, you can start from one of two places. You can design and install a new network from scratch, or you can upgrade an existing network. Either way, you should gather information about several Important factors before you launch the ratiocinative design. For example, depending on the services that will exist provided to clients, you might necessity to anatomize the feasible traffic patterns that might result from your plan. Locate potential bottlenecks and, where possible, alleviate them by providing multiple paths to resources or by putting up servers that provide replicas of Important data so that load balancing can exist provided. The following are other factors to consider:
Who are the clients? What are their actual needs? How own you determined these needs—from user complaints or from help-desk statistics? Is this data reliable?
What kinds of services will you provide on the network? Are they limited in scope? Will any involve configuring a firewall between LANs? And if so, that quiet doesn't account for configuring a firewall to enable access to the Internet.
Will you necessity to allow an Internet connection for just your internal network's users, or will exhaust you necessity to allow outside vendors access to your network? One case that comes to wit is the Internet Printing Protocol (see Chapter 24, "Overview of the TCP/IP Protocol Suite"). What will it cost to evaluate what kind of services user groups necessity to access from the Internet? Will you necessity to allow bar nonexistent users to exhaust email—both within the internal network and through the firewall on the Internet? The very goes for what sites users will exist allowed to access using a network browser and other network applications. Will you own users who toil from home and require dial-in or VPN access through the Internet?
Can your users tolerate a petite downtime now and then due to network problems, or is it necessary to provide a high-availability network? Will you necessity clustered servers to provide for a high degree of uptime, or accomplish your users' applications not suffer from a temporary loss of the exhaust of a server? To provide for maximum uptime, can you afford to build redundancy into your network? For example, Chapter 2 discusses redundant topologies that can exist used to preclude a unique point of failure from making the network (and its resources) unavailable. Chapter 11, "Network Attached Storage and Storage area Networks," describes methods you can exhaust to mirror data at geographically remote locations.
In an existing network, will you maintain the current protocol or upgrade to a different protocol standard? If you create a network from scratch, what factors should impress your network protocol decision? Ethernet is the most well-liked LAN technology in the world today. TCP/IP is the most well-liked protocol suite that runs on Ethernet. Yet there are cases in which other technologies own their niches. consider the implications (such as advocate costs and security) to maintain older, proprietary protocols.
Who Are Your Clients?
This seems love a very simple question. However, I'm not saying, "What are your clients' names and how well accomplish you know their children?" I am referring instead to your erudition of the job descriptions for the users on the network. You necessity to assess toil patterns for various departments so that you can appropriately spot servers, high-bandwidth links, and other such things in the commandeer physical location of the network. If most of the network traffic you expect to remark will arrive from the engineering department, you'll necessity to provide that department with a great data pipe. In Chapter 4, "Upgrading Strategies and Project Management," you'll find more information about surveying the user community to arrive up with a draw that places resources where they are needed.
What Kinds of Services or Applications Will the Network Offer?
Of course, everyone knows that the most Important function of a network today is to advocate multiuser gaming. Seriously, though, you necessity to gain a list of the kinds of applications currently in use, as well as a list of those requested by users. Each application should own a written risk assessment document that points out potential security problems, if any. Typical network applications today embrace FTP, telnet, and, of course, browsing the Web. There are "secure" versions of these applications and there are versions that leave a door wide open into your network. Whatever list of applications you chose to advocate over the network, maintain in wit two things:
Is the application safe? Most applications today arrive in secure versions or can exist used with a proxy server to aid minimize the possibility of abuse. Yet, as they bar nonexistent own seen, even the largest corporations are targets at times, and those companies own the staff that should exist able to preclude these things from happening. Because proxy servers are an Important component of firewalls, this theme is covered in greater detail in Chapter 45. If you want a secure network, this is highly recommended reading!
Does one application overlap another? Every user has his or her favorite application. Some people love one word processor, whereas others prefer a different one. But when dealing with applications or application suites (such as Microsoft Office), you'll find it better to gain a determination and stick with a unique product if it can meet the needs of your users. They might not love it, and training might exist necessary, but supporting multiple applications that accomplish the very thing wastes money and leads to confusion.
A commonly overlooked method for getting data files out of a network and onto the Internet is to simply forward the files as an attachment to an email. So if you contemplate you've blocked file transfers by disabling FTP access through the firewall, this case should present that you really accomplish necessity to accomplish a thorough evaluation of any new application or service you will allow on the network. New applications should exist justified with facts that present why they are needed. If an existing application can exist used to accomplish the very goal, why accomplish you necessity another application? Should you retire the older application and exhaust a newer one? Pay attention to the details. And don't forget to test new applications to ensure that they accomplish as expected. The very goes for older applications—will they toil on the new or upgraded network?
Lastly, accomplish you monitor network usage? accomplish you want to permit users to disburse their days browsing the Net, or checking personal email while at work? Many companies own policies that apply to using the telephone for personal business. accomplish you overlook this situation when giving users email capability? Are you preventing access to sites that are obviously not business-related?
What Degree of Reliability accomplish I Require for Each Network Link?
Just how much downtime is acceptable? For most users, the reply would exist zero. Important components of your network, such as file servers, should own fault tolerance built in from the bottom up. In great servers, you'll find dual-redundant power supplies (each connected to a sever UPS), and disk arrays set up using RAID techniques to provide for data integrity in the event that a disk goes south. If a link between two offices needs to exist up 100% of the time, you should draw for multiple links between the two sites to provide a backup capability. In this case, you furthermore can justify the cost of the extra link by using load balancing so that network response time is improved. And, if you are using multiple links to remote sites, it's always a agreeable concept to own more than a unique path to the site. At one site this author worked at, there were redundant power lines bringing electricity into the site—side-by-side. If a tree falls, will it bring down one or both of those power lines?
Another technology that can exist used to provide an extra layer of redundancy, as well as high-speed access to storage devices, is the Storage area Network (SAN). A SAN is a network that is sever from the LAN and contains only storage devices and servers that necessity to access those devices. Because the network bandwidth is not shared with LAN users, multiple servers can access the very storage. If one server fails, other servers can exist configured to provide redundant access to the data. Also, the very RAID and other redundancy techniques used for storage devices that are directly attached to a server (such as the SCSI hardware and protocols) can exist used on a SAN.
The terms RAID and UPS are Important in today's networks, as is the concept of load balancing and dual-redundant power supplies in great networks. You can find out more about RAID (Redundant Array Of Independent Disks) and UPSs (uninterruptible power supplies) by reading Chapter 5, "Protecting the Network: Preventative Maintenance Techniques." For more information about SANs, remark Chapter 11.
The outmoded saw "If it ain't broke, don't fix it" doesn't apply to networks. You should always exist proactively looking for potential unique points of failure and doing something to fix them. By pile redundancy into the network design at the start, you'll reclaim yourself a lot of grief in the future.
Chapter 5 can give you more suggestions about using clustering, backups, uninterruptible power supplies, and other techniques that can maintain the network up and running.
Choosing a LAN Protocol
Today the de facto protocol of preference has to exist TCP/IP. However, other protocols own their spot in some upright markets. In this book, they talk about NetWare. NetWare has been around so long that you might find you own no preference when designing an upgrade but to maintain using IPX/SPX, depending on the applications your network uses. However, even NetWare has moved toward using TCP/IP as the underlying protocol. This is basically the case for version 5.x and 6.x of NetWare. Older NetWare networks should upgrade, if possible, to one of these newer versions. If you will exist connecting the network to the Internet, TCP/IP will exist a necessity. Even if you don't expect to own an Internet connection, you'll find that choosing TCP/IP is a more practical preference today because most applications toil with it and there is a great market of trained professionals who can exist hired to manage a network built on TCP/IP. NetWare 6.x provides backward compatibility with IPX/SPX for the most part, but newer features such as the iPrint—which uses the Internet Printing Protocol—require TCP/IP.
In addition to transport protocols such as TCP/IP and IPX/SPX, you must consider application protocols that can exist used on the network. For example, to simplify administering configuration information for a great number of computers, you might want to exhaust the Dynamic Host Configuration Protocol (DHCP), which is discussed in Chapter 28, "BOOTP and Dynamic Host Configuration Protocol (DHCP)." If you want to provide a central name resolution service, you might elect the Domain name Service (DNS), which is covered in Chapter 29, "Network name Resolution." If you are going to operate a Windows network that has pre–Windows 2000/XP clients, you might necessity to exhaust the Windows Internet Naming Service (WINS) for backward compatibility.
So when thinking about a network protocol, recall that it's not just one protocol you necessity to worry about. After you've decided which protocols are necessary, research the security implications of each.
It's Virtually Universal: TCP/IP
For bar nonexistent practical purposes, the touchstone LAN protocol today is TCP/IP. This is partly due to the rapid growth of the Internet, and the necessity of most businesses of having a Web presence, as well as the great number of vendors that own adopted this protocol suite. If your LAN is quiet using an older proprietary network protocol, you should seriously consider what it would assume to upgrade to TCP/IP. Currently, TCP/IP version 4 is the most widely used protocol. In the future you can expect that the next version (IPv6) will start to find its passage from the core of the Internet out to the edge, where your network resides. While technologies such as Network Address Translation (NAT) are widely employed to remedy the problem associated with the limited address space provided by IPv4, IPv6 will enable a much larger address space. Combine that with Network Address Translation, and the long-term bets are going to exist on IPv6, or possibly some of the features that are partake of IPv6. In addition to giving you a larger address space, IPv6 includes other Important features. Those that will impress your network the most are security mechanisms, which will only become more Important as Internet commerce continues to grow.
For a particular introduction to TCP/IP, remark Chapter 24, "Overview of the TCP/IP Protocol Suite"; Chapter 25, "Basic TCP/IP Services and Applications"; and Chapter 27, "Troubleshooting Tools for TCP/IP Networks."
There is one very Important understanding you should consider TCP/IP as a LAN protocol: There are more trained professionals knowledgeable in TCP/IP than any other LAN protocol at this time. It is challenging to note that in Windows NT 3.51, the default network protocol was Microsoft's implementation of IPX/SPX (NWLink). In Windows NT 4.0 (and successive operating systems, from Windows 2000, XP, and Server 2003), the default network protocol is TCP/IP.
If your network is composed of several operating systems, from Windows to NetWare to Unix and Linux, then the bottom line is that TCP/IP is the lowest common denominator that will allow the easiest connectivity and interaction between bar nonexistent of these. Even Microsoft's now-legacy NetBIOS/NetBEUI protocols own been adapted to hasten over TCP/IP.
Novell's NetWare Version 6.5
NetWare was perhaps the first attempt at seriously providing a LAN protocol that was smooth to use. The basic file and print services offered by early versions of NetWare were much better than other solutions available at that time. After it became established in the commerce community, NetWare became the network solution of preference in many commerce environments that used the PC. Microsoft countered this success with its LANManager products, which were furthermore marketed by other vendors in their own way, such as the Pathworks solution from Digital outfit Corporation.
Today NetWare is a totally revamped solution to LAN connectivity. It provides many new features that are addressed to specifically gain exhaust of the Internet, and allow mobile users to connect to their home networks, as well as to enable NetWare users to gain connections to outside networks. For example, the iPrint feature enables NetWare users to print to a printer on a remote network. For example, instead of sending a catalog that may exist out of date in a month or so, you can exhaust iPrint to periodically forward specific information material to each customer, by printing it directly to the customer's printer.
And NetWare's iFolder allows mobile users to synchronize data stored on remote computers (such as a laptop computer) with the data stored on the company's network. Microsoft and other vendors offer similar features. However, the point to recall is that if you already are a NetWare user, you don't own to toss out your existing investment and wobble to a Microsoft network, or even a Unix/Linux environment. NetWare has changed as the market has changed, and you might find it less expensive to upgrade to NetWare 6.5 than to migrate to another platform. The bottom line involves not just the cost of migrating to another operating system, but the costs involved with retraining your network administrative personnel in new technology.
Because NetWare 6.5 is so tightly integrated with the IP protocol, and furthermore offers backward compatibility with IPX/SPX, admins for existing NetWare networks should consider upgrading to NetWare 6.5 as well as considering other options.
If you want to wobble to Linux, Novell makes it smooth by incorporating an enhanced version of NetWare 6.5 and SuSE Linux into its Novell Open Enterprise Server. Open Enterprise Server supports both Linux and NetWare-specific software and features, enabling you to wobble to Linux gradually.
Other LAN/WAN Protocols
The distinction between LAN and WAN (wide area networking) protocols is genesis to blur. Ethernet was once considered to exist a LAN protocol. As time has passed, other technologies, such as Token-Ring, own become minor players in the LAN world. Yet the contradictory is apt of Ethernet. It has grown from a modest specification endorsed by Intel, DEC, and other vendors, such that it now can exist considered a WAN protocol. The capabilities introduced by current LAN technologies are genesis to erode the differences between a LAN and a MAN (metropolitan area network). When the fourth edition of this bespeak was published, Gigabit Ethernet was starting to drop into the inexpensive compass of network topologies. That trend has continued and now 10Gigabit Ethernet (10GbE) is frequently being used in enterprise data centers. Today you may exist using 100BASE-T for connecting client computers to the network, and Gigabit Ethernet to connect network segments via the network backbone. In some cases your network might even exist exclusively based on 10GbE.
What does this denote to a network administrator today? With 10Gigabit Ethernet, you can exhaust TCP/IP not only to create a local area network backbone, but to extend that compass to a metropolitan area network. And because TCP/IP is so intertwined with Ethernet, you can achieve an end-to-end MAN link that uses TCP/IP over faster Ethernet connections. Instead of employing more expensive solutions, such as SONET, you can now connect offshoot offices in the very geographical area using just TCP/IP.
You may not own to worry about installing expensive outfit used by SONET and other typical MAN protocols. Still, for the long haul—for example, between different cities—other protocols such as ATM and Frame Relay will arrive into play.
For more information about SONET, ATM, and Frame Relay, remark Chapter 15, "Dedicated Connections."