The protocols database lists the TCP/IP protocols that are installed on your system and their numbers. The Solaris installation program automatically creates the database. This file seldom requires any administration.
The protocols database contains the names of the TCP/IP protocols that are installed on the system. The protocols(4) man page describes the syntax of this database. An example of the /etc/inet/protocols file follows.
# # Internet (IP) protocols # ip 0 IP # internet protocol, pseudo protocol number icmp 1 ICMP # internet control message protocol tcp 6 TCP # transmission control protocol udp 17 UDP # user datagram protocol