2 # protocols This file describes the various protocols that are
3 # available from the TCP/IP subsystem. It should be
4 # consulted instead of using the numbers in the ARPA
5 # include files, or, worse, just guessing them.
8 ip 0 IP # internet protocol, pseudo protocol number
9 icmp 1 ICMP # internet control message protocol
10 igmp 2 IGMP # internet group multicast protocol
11 ggp 3 GGP # gateway-gateway protocol
12 tcp 6 TCP # transmission control protocol
13 pup 12 PUP # PARC universal packet protocol
14 udp 17 UDP # user datagram protocol
15 idp 22 IDP # WhatsThis?
16 raw 255 RAW # RAW IP interface