network debugging packets!

routes. ICMP packets are important 

can be sent using shorter internetwork 

gateway informs the node that IP packets 

cannot reach its destination or when the 

may be generated when an IP packet 

Control Message Protocol (ICMP) packet 

IP packet. For example, an Internet 

node on the network that transmitted an 

information between an IP gateway and a 

This packet is carrying diagnostic 

DoD ICMP