When two actions from the initial value of the TTL?

Refer to the exhibit.

Which troubleshooting a routing issue, an engineer issues a ping from S1 to S2.

When two actions from the initial value of the TTL? (Choose two.)
A . The packet reaches R3, and the TTL expires
B . R2 replies with a TTL exceeded message
C . R3 replies with a TTL exceeded message.
D . The packet reaches R2 and the TTL expires
E . R1 replies with a TTL exceeded message
F . The packet reaches R1 and the TTL expires.

Answer: A,D

Explanation:

Source MAC in the capture is VMWare, MAC is Cisco. Routers first check the TTL before any further process, subtract 1 at R1. Send to R2, subtract and you have ZERO. Discard packet and reply with ICMP Time Exceeded message from that point, don’t even bother checking the Route table for further processing.

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