What is the What is the difference between VLAN VPN?

Answer 1

Basically, VPN deals with security and connecting nodes in a private network across a public IP internet work. Read RFC 1853 - IP Tunneling. You can take one physical LAN and split it into multiple virtual LANs, or you can take multiple physical LANs and integrate them into a VLAN. RFC 0824 is good reading.

Answer 2

A VLAN is where you segment a local area network in to logical separate networks, each can not see the systems on the others; without specific permissions setup to do so.

A VPN (Virtual Private Network) is a wide area network (Multiple office locations for example) that is setup through a firewall to appear as one big LAN (Local Area Network). In doing so; as an example, the computers in your New York Office can see all of the computers in your Cleveland office as if they were local to New York. You can see and access the shared drives, printers, storage arrays, ect.

Now when I say you can see ALL devices between locations this is of course based upon the rules setup so you can LIMIT the scope of what can be accessed but you get the point.

Hope this helps

JWilliamsoh

http://jwilliamsoh.spaces.live.com/

Answer 3

hai this is harinder

VPN:-

VPNs are built on top of a publicly-accessible infrastructure, such as the Internet or the public telephone network. They use some form of encryption and have strong user authentication. Essentially a VPN is a form of WAN; the difference is their ability to use public networks rather than private leased lines. A VPN supports the same intranet services as a traditional WAN, but also supports remote access service. This is good for telecommuting, as leased lines don't usually extend to private homes and travel destinations. A remote VPN user can connect via an Internet Service Provider (ISP) in the usual way. This eliminates long-distance charges. The user can then initiate a tunnel request to the destination server. The server authenticates the user and creates the other end of the tunnel. VPN software encrypts the data, packages it in an IP packet (for compatibility with the Internet) and sends it through the tunnel, where it is decrypted at the other end. There are several tunneling protocols available: IP security (IPsec), Point-to-Point Tunneling Protocol (PPTP) and Layer 2 Tunneling Protocol (L2TP).

LAN

The most widely deployed type of network, LANs were designed as an alternative to the more expensive point-to-point connection. A LAN has high throughput for relatively low cost. LANs often rely on shared media, usually a cable, for connecting many computers. This reduces cost. The computers take turns using the cable to send data.