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Resources Home About InternetWeek.com Contact Us E-Mail Newsletter Tech Library TechCareers Privacy Statement Resource Centers Virtual Private Networks (VPNs) TechWeb Sites InformationWeek InternetWeek Network Computing Financial Technology Network Bank Systems & Technology Insurance & Technology Wall Street & Technology Technology & Learning Optimize Magazine The Open Enterprise Ad Info |
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This initial white paper covers VPN basics. It is an extension of our recently concluded seminars. It starts by defining what a VPN is, then details emerging VPN applications, discusses why VPNs are needed in many companies today and introduces the core technologies needed to build a VPN. This white paper concludes with two case studies that illustrate how VPNs can be used to conduct business and save companies money.  Does Everybody Really Know What A VPN Is? VPN has been a popular buzzword over the past two years. But does everyone fully understand what a VPN is and exactly how it works? Now is a good time to define a VPN before there can be further discussion because the term can mean many things. VPN Core Technology Primer: RADIUS Servers Besides the normal tasks of maintaining remote-access server equipment, managers often find their time consumed administering access rights and authentication privileges on several, geographically dispersed remote access servers at the same time. Enter the Remote Authentication Dial In User Service (RADIUS), a commonly used authentication system. Now's The Time To Start Looking At VPN's Benefits To understand why VPNs are needed, it is best to step back a minute and look at some connectivity and business trends. A number of events that are occurring in the corporate world are changing basic connectivity requirements. VPN Implementation Calls For A Tunnel Trip Tunneling is at the heart of all VPN implementations. There are two generic classes of tunnels. The first is end-to-end tunneling where, for example, the tunnel extends from a remote user's PC to the server that user is connecting to. The second type is node-to-node tunneling, where the tunnel terminates at the edge of the network. How Do Service Providers Fit In The VPN World? IT managers need to decide what role a service provider is going to play in their virtual private network implementation. What makes the decision difficult is that the provider's role can range from simply supplying Internet access to one where the provider offers a turnkey system that includes access, equipment, management of the equipment and administration of VPN services. Early Adopters See Real Business Benefits To VPNs Some companies are reluctant to use virtual private networks because they're concerned about Internet outages and poor performance. But that doesn't have to be the case. For instance, JetForm Corp. tore out a 14-node frame relay network that connected 13 offices in North America and Europe to corporate headquarters in Ottawa and replaced it with an international VPN. |
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Let our Solution Center help you find the network products you need. Then, receive customized proposals from qualified suppliers -- fast! MORE Looking for technical information, white papers and analyst reports on CRM, wireless, enterprise networking, and more? Don't miss Tech Library's collection of 14,000+ white papers. Featured White Paper: Supply Chain Management: Why B2B eMarkets Are Here to Stay -- Accenture |
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