What technique uses one protocol to carry data from another protocol, effectively tunneling it through a different transport?

What technique uses one protocol to carry data from another protocol, effectively tunneling it through a different transport?

• A. Encapsulation
• B. VPN
• C. Tunneling
• D. Protocol Wrapping

Answer: (C)

Tunneling. In this technique, the payload of one protocol is wrapped inside the packets of another protocol, creating an outer “tunnel” transport that can traverse networks that may not support the inner protocol directly. The inner data is carried through the network by the outer protocol, and at the destination the original protocol’s data is extracted. For example, carrying an IP packet inside a GRE tunnel or using a VPN that encapsulates data for secure transit are practical illustrations. While encapsulation is the broader idea of wrapping data with extra headers, and protocol wrapping isn’t a standard term, the act of using one protocol to transport another’s data across a different transport is specifically tunneling.

Tunneling. In this technique, the payload of one protocol is wrapped inside the packets of another protocol, creating an outer “tunnel” transport that can traverse networks that may not support the inner protocol directly. The inner data is carried through the network by the outer protocol, and at the destination the original protocol’s data is extracted. For example, carrying an IP packet inside a GRE tunnel or using a VPN that encapsulates data for secure transit are practical illustrations. While encapsulation is the broader idea of wrapping data with extra headers, and protocol wrapping isn’t a standard term, the act of using one protocol to transport another’s data across a different transport is specifically tunneling.