Virtual Private Networks Essay -- VPN Internetworking Computers Intern

Virtual Private NetworksVirtual Private Networks (VPNs) be an easy and cost effective way to connect two or more networks everyplace the net profit. This is achieved by use encrypted tunnels for security measure and efficiency. VPNs use encapsulated and encrypted IP packets and transport them across leased Local Area Network (LAN) lines.The benefits of using VPNs are reduced cost overhead, reduced management overhead, and added security (Microsoft Press, 2000). to the lowest degree network lines are expensive and VPNs reduce then need for otiose selective information connections. This in turn also aids in trim down the amount of overhead associated with managing a network. The added security benefits for a network involve encrypted transmission of network data and user authentication.Passing datagrams across the Internet between sites can cause major security risk. When a datagram is passed internally within a private network it is secured behind a router and /or firew all. When datagrams are passed externally outsiders can monitor them as they pass over networks owned by other organizations (Comer, 1995). This can cause great security problems. Unencrypted packet headers contain valuable information about the internal construction of an organizations network.VPNs have overcome the problem of direct Internet access to servers and clients with a combination of the following security components IP encapsulation, cryptographic authentication, and data payload encryption. For a true VPN to exi...