What is the difference between IPsec tunnel and transport mode?
A. Tunnel mode uses encryption and transport mode uses TCP as the transport protocol.
B. Tunnel mode uses encryption and transport mode uses UDP as the transport protocol.
C. Transport mode protects upper-layer protocols, such as UDP and TCP, and tunnel mode protects the entire IP packet.
D. Tunnel mode protects upper-layer protocols, such as UDP and TCP, and transport mode protects the entire IP packet
