Implementing Cisco SD-WAN Solutions (ENSDWI) — Question 255

What are the two reasons a customer chooses to use IPsec tunnels over GRE? (Choose two.)

Answer options

• A. IPsec failure detection is faster.
• B. Generally, they provide a higher bandwidth for tunnel connection.
• C. CFlowd is required.
• D. A WAN Edge router is behind NAT.
• E. IPsec is more secure.

Correct answer: A, E

Explanation

The correct answers are A and E because IPsec provides faster failure detection mechanisms compared to GRE, and it is designed to offer greater security through encryption and authentication. Options B, C, and D do not accurately reflect the primary advantages of IPsec over GRE, as bandwidth is not inherently higher, CFlowd is not a requirement, and NAT traversal can be handled by both protocols.