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Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) · Cisco
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
The correct answer is B. The DF bit has been set. The DF (Don't Fragment) bit is set, and the packet size exceeds the maximum MTU of 1492 bytes, causing the extended ping to fail.
B ist correct. R1 sends the ping with a packet size of 1500 and the DF bit set (=R1 is not allowed to fragment the ping). R2 only accepts packets with the size of 1492. Therefor the ping gets discarded from R2. To solve this, dont set the DF bit or lower the packet size.
You can also reduce the datagram size for the extended ping