NSE 7 – SD-WAN 6.4 — Question 69

Which two reasons make forward error correction (FEC) ideal to enable in a phase one VPN interface? (Choose two.)

Answer options

• A. FEC is useful to increase speed at which traffic is routed through IPsec tunnels.
• B. FEC transmits the original payload in full to recover the error in transmission.
• C. FEC transmits additional packets as redundant data to the remote device.
• D. FEC improves reliability, which overcomes adverse WAN conditions such as noisy links.
• E. FEC reduces the stress on the remote device jitter buffer to reconstruct packet loss.

Correct answer: C, D

Explanation

The correct answers are C and D because FEC generates additional packets to provide redundancy, which is crucial for error correction (C), and it improves the overall reliability of the connection, particularly in challenging WAN scenarios (D). Options A and B do not accurately represent the primary functions of FEC, while option E is related but does not explain the core benefits of using FEC.