Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 46

Which TCP setting is tuned to minimize the risk of fragmentation on a GRE/IP tunnel?

Answer options

• A. MSS
• B. MTU
• C. MRU
• D. window size

Correct answer: A

Explanation

The correct answer is A, MSS (Maximum Segment Size), as it specifies the largest segment of data that TCP can send, helping to prevent fragmentation. While MTU (Option B) also relates to packet size, it is more about the maximum transmission unit for the entire packet, not specifically for TCP segments. MRU (Option C) and window size (Option D) do not directly address fragmentation risk in the context of TCP over GRE/IP tunnels.