Question

During a traceroute, which action does a router perform to the value in the Time To Live (TTL) field?

Answer 1

During a traceroute, a router decrements the value in the Time To Live (TTL) field by 1 before forwarding the packet to the next hop. When the TTL value becomes 0, the router discards the packet and sends an ICMP Time Exceeded message back to the sender.

Step-by-step explanation:

During a traceroute, a router decrements the value in the Time To Live (TTL) field by 1 before forwarding the packet to the next hop. The TTL field is initially set by the sender to a specific value, such as 64 or 128, in order to limit the lifespan of the packet.

Each time the packet is forwarded by a router, the TTL value is decremented until it reaches 0. When the TTL value becomes 0, the router discards the packet and sends an ICMP Time Exceeded message back to the sender, indicating that the packet was dropped due to the TTL expiration.

Answer 2

A router decreases the TTL by one for each hop during a traceroute. When TTL reaches zero, it discards the packet and sends an ICMP 'Time Exceeded' message back to the source.

Step-by-step explanation:

During a traceroute, a router decreases the Time To Live (TTL) value in the packet by one for each hop. When the TTL reaches zero, the router discards the packet and sends an ICMP 'Time Exceeded' message back to the source. This process is used to identify the path packets take through the network from the source to the destination.