# /etc/protocols - protocol name database
#
# This file consists of three, whitespace separated fields.  They are
# id, number and name.  Often there is a fourth, commented field that
# gives a brief decription of the protocol.  Any text that is preceded
# by hash marks is considered to be a comment.
#
# This file was constructed using information from the Internet Assigned
# Numbers Authority. See http://www.iana.org/assignments/protocol-numbers
# for more information about registered protocols.
#
# A few of the commonly used IP protocols are listed below.

ip      0     IP          # IPv4
icmp    1     ICMP        # Internet Control Message
tcp     6     TCP         # Transmission Control
udp    17     UDP         # User Datagram