Virtual Private Networks   Term Paper ID:33087 Click to get this paper

Essay Subject: This paper provides a basic explanation of virtual private networks and how they operate ...... More...

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Paper Abstract: This paper provides a basic explanation of virtual private networks and how they operate, with an emphasis on their many levels of security. Problem of security of private data. Paper Introduction: Virtual Private Networks With the advent of globalization many companies now have wide areanetworks WANs for communicating with their offices and customers aroundthe world WANs are superior to public networks in terms of reliability performance and security but they are expensive due to the cost of theleased lines used to support them Now that the Internet reaches aroundthe world therefore many companies are reducing costs by using it as avirtual WAN instead of installing a physical WAN These virtual privatenetworks VPNs are Text of the Paper: The entire text of the paper is shown below. However, the text is somewhat scrambled. We want to give you as much information as we possibly can about our papers and essays, but we cannot give them away for free. In the text below you will find that while disordered, many of the phrases are essentially intact. From this text you will be able to get a solid sense of the writing style, the concepts addressed, and the sources used in the research paper. Retrieved on May 1, 2 5, from http://www.chelseatechnology.co.uk/faq.php?referrer=google 4. Allowing theirsensitive data to travel over the world's Internet seemed too risky. "What is a Firewall?" Chelsea Technology. Retrieved on May 1, 2 5, from http://www.webopedia.com/TERM/r/routing.html Businesses no longer have to commit to huge, expensive projectswith long timeframes to build buildings and install dedicated lines. A VPN also facilitates the exchange of data overdifferent time zones, since users can connect at different times and sharethe same infrastructure. Furthermore, a VPNprovides excellent scalability-unlike physical networks, which can easilybe overloaded, outmoded, or crippled by outdated technology. A AAA server is used "to control what computer resources users haveaccess to and to keep track of the activity of users over a network" (5).AAA stands for authentication, authorization, and accounting.Authentication identifies an individual based on a username and password;authorization grants or denies access following authentication; andaccounting keeps track of the user's activity on the network (5). "How Virtual Private Networks Work." Retrieved on May 1, 2 5, from http://computer.howstuffworks.com/vpn.htm 2. Security and cost savings are not the only benefits of a VPN, though.The VPN gives companies a great time advantage. Routing (1, 2) A firewall is "a piece of software that monitors all incoming networktraffic and allows in only the connections that are known and trusted" (3). Routing is the process of moving a packet of data from its source toits destination. Works Cited 1. Imaginehaving to build two houses, buy two telephones, and lay a phone linebetween them so that the inhabitants could call each other up. In spite of the cost savings, many businesses were hesitant at firstto migrate from leased lines to VPNs. For one thing, they don'thave the long waiting period that goes with the installation of a dedicatedline; they can be up and running in as many locations as they wantvirtually overnight. It allows you to address apackage and drop it in the system, but there's no direct link between youand the recipient" (4). And once you have aVPN in place, the cost to add new locations is negligible (2). VPNs are very dependable. In the more securetunnel mode, both the header and the data are encrypted. IP Security . The message is disguised by changing all of theletters in it to different letters. Encryption is much moresophisticated today and virtually impossible to decrypt. In transport mode, IPsec encrypts only the dataportion of each packet and leaves the header untouched. "AAA." Internet.com Webopedia. Now imaginethat the two inhabitants each have laptops that they can take anywhere inthe world and communicate with each other completely independently of phonelines or what building they are in. It supportsthe secure exchange of packets at the Internet Protocol (IP) layer. Now that the Internet reaches aroundthe world, therefore, many companies are reducing costs by using it as avirtual WAN instead of installing a physical WAN. "Routing." Internet.com Webopedia. "Managing Your Virtual Private Network (VPN)." Retrieved on May 1, 2 5, from http://www.sciodata.com/VPN/VPNMonitoring.htmManaging 3. The router performs a job similar to that of adispatcher, sending the data from one computer to another until iteventually reaches the target machine (6). I ban sum up the cnmparative analysis of VPN versusphysically installed communications channels in three words: VPN is better. In a globalmarketplace, scalability is a must; it takes the limits on how far and howbig a company can go. Encryption is a fascinating method of protecting information using aprocess called cryptography, from "crypto" (which means "hidden") and"graphos" (which means "to write"). Tyson, Jeff. A dedicated device called a "rnuter" is normally used toaccomplish this. Forthis reason, VPN providers have focused on security as the main issue theyneeded to resolve in order to replace leased lines. Encryption . AAA Server . If you've ever seen war movies whereagents had to break a secret code to decipher a message, you know howcryptography works. Virtual Private Networks With the advent of globalization, many companies now have wide areanetworks (WANs) for communicating with their offices and customers aroundthe world. Firewalls . "IP byitself is something like the postal system. Retrieved on May 1, 2 5, from http://isp.webopedia.com/TERM/I/IPsec.html 5. Retrieved on May 1, 2 5, from http://isp.webopedia.com/TERM/A/AAA.html 6. The firewall gives you access to the ports you need open and closes offthose you don't, making your computer essentially invisible to hackers.Advanced firewall software can also monitor outgoing traffic, to preventspy ware and Trojan horses from accessing the Internet, where they canspread (3). Both the sendingand receiving devices must share a public key, and the receiver canauthenticate the sender via digital certificates (4). WANs are superior to public networks in terms of reliability,performance, and security, but they are expensive due to the cost of theleased lines used to support them. Presumably, only someone with thesecret key can decipher the message, although experienced cryptologistsbroke a lot of secret codes during the wars. They reasoned that the extra costwas justified to ensure that their data was secure. That is the most striking differencebetween VPNs and all the physical forms of connectivity they are stackedagainst. The biggest advantage of VPNs, though, is their flexibility. "IPSec." Internet.com Webopedia. IP Security, or IPsec, is a set of protocols used by VPNs. These virtual privatenetworks (VPNs) are private networks that use a public network (usually theInternet) to connect remote sites or users together just as though theywere on a leased line (1). Theycan connect through a VPN almost immediately at relatively low cost,reconfigure their sites endlessly at no expense, and add on new siteswhenever they want at practically a moment's notice. A well-designed VPNnow has several levels of security: . If this paper is not what you are looking for, you can search again: Search for: or Click here to request an essay written just for you.

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