JNCIP-SP: Juniper Networks Certified Professional – Service Provider (2023) — Question 41

You have an L2VPN connecting two CEs across a provider network. The CEs and provider network are configured with the default MTU setting. You use the ping command from one CE to the other CE with a size of 1500 bytes.
In this scenario, which statement is correct when using the ping command?

Answer options

• A. You expect an ICMP message too long error.
• B. You expect an echo reply.
• C. You expect a silent discard.
• D. You expect the ping results to be fragmented.

Correct answer: C

Explanation

The correct answer is C because if the MTU is set to a value smaller than the packet size, the packet will be discarded silently, as there is no fragmentation support in the L2VPN. Options A and B are incorrect because an ICMP error or an echo reply would only occur if the packet could be processed or the MTU allowed it. Option D is wrong since fragmentation does not occur in this scenario.