A router will discard a packet if the TTL value reaches ________.
A)0
B)1
C)128
D)the maximum value in the router's configuration file
E)the minimum value in the router's configuration file

Question

Quizplus · Accepted Answer

When a packet is sent, it has a Time To Live (TTL) value which indicates the maximum number of network hops (routers) it can pass through before it should be discarded. Each router decrements the TTL value by 1 until it reaches 0. At that point, the router will discard the packet and send an ICMP "Time Exceeded" message back to the sender. Therefore, the correct choice is A) 0, because when the TTL value reaches 0, the packet has exceeded its allowed number of network hops and should be discarded.

A Router Will Discard a Packet If the TTL Value