Which term describes two categories of tunneling protocols based on how tunnels are established?

Which term describes two categories of tunneling protocols based on how tunnels are established?

• A. PPTP and IPsec
• B. Layer 2 and Layer 3
• C. Voluntary and Compulsory
• D. Secure and Nonsecure

Answer: (C)

Tunneling protocols can be categorized by how the tunnel is created: whether the endpoints establish it by choice or the network forces it. This distinction is described as voluntary versus compulsory. Voluntary tunneling means the tunnel is initiated by the endpoints or the user, and it’s used for specific sessions or traffic as needed. Compulsory tunneling means the network enforces the tunnel for all traffic (or a defined set of traffic), regardless of user action, to ensure that data flows through the tunnel for security, policy enforcement, or monitoring. This framing fits the concept of establishing tunnels, rather than naming specific protocols, layers, or security states.

Tunneling protocols can be categorized by how the tunnel is created: whether the endpoints establish it by choice or the network forces it. This distinction is described as voluntary versus compulsory.

Voluntary tunneling means the tunnel is initiated by the endpoints or the user, and it’s used for specific sessions or traffic as needed. Compulsory tunneling means the network enforces the tunnel for all traffic (or a defined set of traffic), regardless of user action, to ensure that data flows through the tunnel for security, policy enforcement, or monitoring.

This framing fits the concept of establishing tunnels, rather than naming specific protocols, layers, or security states.