Tunneling related questions
Tunneling- October 24, 2008 at 18:10 pm by Rajmeet Ghai
What is Tunneling?
Tunneling is a mechanism provided to transfer data securely between two
networks. The data is split into smaller packets and passed through the tunnel.
The data passing through the tunnel has 3 layers of encryption. The data is
encapsulated. Tunneling can be approached by Point to Point tunneling protocol.
What are voluntary and compulsory tunnels?
Voluntary Tunneling
Users computer is an end point of the tunnel and acts as tunnel client. Here
the client or user issues a request to configure and create a voluntary tunnel.
They require a dial up or LAN connection. Example of dial up connection is
internet at home where a call is made to the ISP and connection is obtained.
Compulsory tunneling
In compulsory tunneling, instead of the user a vpn remote access server
configures and creates a tunnel. Hence, the end point is the Remote sever not
the user.
Explain static and dynamic tunnels.
Tunnels that are created manually are static tunnels. Tunnels that are auto
discovered are dynamic tunnels. In dynamic tunneling, tcp connections can be
checked dynamically. If no connections exist that are routed through the
tunnel, a check for more suitable gateway can be done. Static tunneling may at
times require dedicated equipments.
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