Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 176

What is a key benefit of using a GRE tunnel to provide connectivity between branch offices and headquarters?

Answer options

• A. authentication, integrity checking, and confidentiality
• B. less overhead
• C. dynamic routing over the tunnel

Correct answer:

Explanation

The primary benefit of a GRE tunnel is that it provides authentication, integrity checking, and confidentiality, which ensures secure communication between the offices. While less overhead and dynamic routing are also advantages of GRE tunnels, they do not specifically highlight the key security features that are crucial for connectivity between branch offices and headquarters.