VPN (Virtual Private Network)

Using public network for private use we call it as VPN.
To protect the private data over internet, It uses protocols like L2TP, PPTP
VPN uses internet for providing communication between two different networks and With the help of these VPN protocols private data is tunneled and sent to the destination.

L2TP: (Layer 2 Tunneling Protocol)

Jointly developed Microsoft & CISCO
Supports all types of networks ex: IP, frame relay, IP sec etc..

Supports header compression
PPTP: (Point to Point Tunneling Protocol):
Developed by Microsoft runs only on IP based networks
Doesn’t support header compression

Establishing VPN connection:

VPN connection requires a primary connection which can be DUN, ISDN, internet etc.,

Creating a VPN connection
On client machine
My network places – properties
Double click new connection wizard
Next- connect to network at my work place
Next – VPN – name – public network
Specify the server name ex: sys1
Anyone’s use – finish