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.

View Answer

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.