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