1# 2# Internet (IP) protocols 3# 4# @(#)protocols 8.1 (Berkeley) 06/09/93 5# 6ip 0 IP # internet protocol, pseudo protocol number 7icmp 1 ICMP # internet control message protocol 8igmp 2 IGMP # internet group management protocol 9ggp 3 GGP # gateway-gateway protocol 10tcp 6 TCP # transmission control protocol 11egp 8 EGP # exterior gateway protocol 12pup 12 PUP # PARC universal packet protocol 13udp 17 UDP # user datagram protocol 14hmp 20 HMP # host monitoring protocol 15xns-idp 22 XNS-IDP # Xerox NS IDP 16rdp 27 RDP # reliable data protocol 17iso-tp4 29 ISO-TP4 # ISO Transport Protocol Class 4 18iso-ip 80 ISO-IP # ISO Internet Protocol 19encap 98 ENCAP # RFC1241 encapsulation 20