(Echo Reply Message)

 (Echo Message)

 (Source Route Failed)

 (Frag. Needed & DF Set)

 (Port Unreachable)

 (Protocol Unreachable)

 (Host Unreachable)

 (Net Unreachable)

 (Address Mask Reply)

 (Address Mask Request)

 (Info Reply)

 (Info Request)

 (Timestamp Reply)

 (Timestamp)

 (Parameter Problem)

 (Time Exceeded)

 (Router Solicitation)

 (Router Advertisement)

 (Echo)

 

 

 (Redirect)

 (Source Quench)

 (Dest. Unreachable)

 

 

 (Echo Reply)