Next $($with the packets still sorted by source address$)$ find the series of ICMP TTL$-$exceeded replies sent to your computer by the nearest $($first hop$)$ router. What is the value in the Identification field and the TTL field?

$9.$ Do these values remain unchanged for all of the ICMP TTL$-$exceeded replies sent to your computer by the nearest $($first hop$)$ router? Why?