VPN as a T-1 Circuit Alternative
Today's business environments demand employees to be connected to corporate intranet resources from remote offices or while traveling. High bandwidth internet connections have made long-distance dial-up connections obsolete and have given birth to a newer technology called the Virtual Private Network (VPN) which can be characterized by a client server approach and is a form of a Wide Area Network (WAN). "VPN clients authenticate users, encrypt data, and otherwise manage sessions with VPN servers utilizing a technique called tunneling" (Mitchell, n.d.a).
What is a VPN?
A VPN is a "communications network tunneled through another network and dedicated for a specific network" (Wikipedia, 2007). A traditional VPN uses the internet (public communication) to communicate directly with a single network (private communication).
Science fiction buffs may also relate a VPN to a wormhole due to its tunneling characteristics between the client and the server.
The term VPN was originally introduced by telecom companies. "The main feature of a telephone VPN is that it can provide users from an organization which uses a public provider's telephone service instead of its own private PBX with something very close to PBX (Private Branch Exchange) functionality" (Olifer, 2007).
Why use a VPN?
VPN solutions become attractive when the need to provide secured long distance access to a private network arises. The traditional method of accomplishing this was to install a high-speed digital link such as a T-1 (or fractional T-1) between the locations or use a remote access server (RAS), or modem pools, incurring long-distance telephone fees.
A dedicated point-to-point communication line such as a T-1 can offer...
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Mitchell, Bradley. (n.d.b) Q. What are the advantages and benefits of a VPN? Retrieved October 6, 2007, from About.com web site from http://compnetworking.about.com/od/vpn/f/vpn_benefits.htm
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Olifer, Victor. (2007). Different flavours of VPN: Technology and applications. Retrieved October, 2007 from JNT Association web site at: http://www.ja.net/development/vpn/different-flavours-of-vpn-web.pdf
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fiber-optic cables that run from a major city to another major city. So if you
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Cisco Designs, manufactures, and sells Internet Protocol (IP) - based networking and other products related to the communications and information technology (IT) industry and provide services associated with these products and their use. The company provides products for transporting data, voice within buildings, across campuses and globally. The products are utilized at enterprise businesses, public institutions, telecommunications companies and other service providers, commercial businesses, and personal residences. Cisco conducts its business globally and manages its business geographically. Its business is divided into the following three geographic segments: The Americans; Europe, M...
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In addressing the problem, the proposed research will use the case study method to examine the plan, design, and implementation of WLAN technologies at Berean. At present, the non-wireless local area network (LAN) technologies employed by Berean include 10/100BaseT Ethernet at each desktop. Ethernet ports at the desktop are switch connected to an Asynchronous Transfer Mode (ATM) T1 backbone. Berean¡¦s one remote facility connects to the network using switched Frame Relay services along with Internet Virtual Private Network (VPN) connections.
Virtual Private Network presents some advantages over the traditional network technologies. VPN offers direct cost savings over leased lines or long-distance calls for remote access, savings resulting from reduced training requirements and equipment, increased flexibility, scalability, and security. The main advantage of VPN is the cost savings of Internet VPN when compared to networks built using conventional leased lines. Leased lines include tariffs that have an installation fee, a fixed monthly cost, and a mileage charge. The cost to an organization of traditional leased lines may be reasonable at first but can increase exponentially as the organization grows. As an organization grows and more companies must be added to the network, the number of leased lines required increases dramatically. VPN that utilizes the Internet avoids this problem by simply tapping into the geographically distributed access already available. Another way VPN reduces costs is by reducing the need for long-distance telephone charges for remote access. Instead of having the offsite team of a company dial into the corporate modem bank via long distance lines, the company’s VPN allows them to simply place local calls to the ISP’s POP in order to connect to the corporate network.
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