NSE 7 – SD-WAN 6.4 — Question 61

Which two benefits from using forward error correction (FEC) in IPsec VPNs are true? (Choose two.)

Answer options

• A. FEC transmits the original payload in full to recover the error in transmission.
• B. FEC reduces the stress on the remote device buffer to reconstruct packet loss.
• 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.

Correct answer: C, D

Explanation

Answer C is correct because FEC sends redundant packets to help recover lost data, while answer D is accurate as FEC increases reliability in challenging WAN environments. Answers A and B are incorrect because A implies FEC does not send redundant packets, and B misstates the primary function of FEC regarding buffer stress.