0 echo Echo Reply
3 dest Destination Unreachable
4 src-quench Source Quench
5 redirect Redirect
8 echo-req Echo Request
9 router-ad Router Advertisement
10 router-sol Router Solicitation
11 time-exceed Time Exceeded for a Datagram
12 param-prob Parameter Problem on a Datagram
13 time-req Timestamp Request
14 time-reply Timestamp Reply
15 info-req Information Request
16 info-replay Information Replay
17 addr-mask Address-Mask Request
18 addr-reply Address-Mask Reply