Virtual Private Network

Virtual Private Network

Contents     Page No.

    • Traditional Connectivity 2
    • What is a Virtual Private Network? 3
    • Basic Architecture of VPN 4
    • What makes a Virtual Private Network Private? 5
        o VPDN 5
        o NAS (Network Access Server) 5
    • Types of VPN 6
        o Remote-Access VPN 6
        o   Site-to-Site VPN 6
              ▪ Intranet 6
              ▪ Extranet 7
    • How do VPNs Work? 8
    • Protocols Used in VPN 8
    o PPTP 8
    o L2TP 8
    o IPSec 8
    • Encapsulation of Packets 9
    • VPN Security 9
    o Firewalls           10
    o Encryption           10
    o IPSec           10
    o AAA Server           11
    • What features are needed in VPN?           11
    • Applications of VPN           12
    o Site-to-Site           12
    o Remote –Access           12
    • Industries that may use VPN           13
    • Where do we see VPNs in Future           13
    • Advantages of VPN           14
    • Disadvantages of VPN           15


  [pic]Through Leased Lines

What is a Virtual Private Network(VPN)?

Using a public network, usually the Internet, to connect securely to a private network, such as a company's network is the basis of a VPN or virtual private network.  Companies and organizations will use a VPN to communicate confidentially over a public network and can be used to send voice, video or data. It's an excellent option for remote workers and organizations with global offices and partners to share data in a private manner.
    ➢ Virtual Private Network is a type of private network that uses public telecommunication, such as the Internet, instead of leased lines to communicate.

    ➢ They are called ‘Virtual’...