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IPX/SPX Programming Manual

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HP NonStop IPX/SPX Programming Manual—528022-001
A-1
A
Well-Known IP Protocol Numbers
Table A-1 provides a list of commonly used IP protocol numbers, together with the
names you can use for them in your application programs. These protocols are
provided in the file $SYSTEM.ZTCPIP.PROTOCOL. For other protocol numbers, refer
to RFC 1010, “Assigned Numbers.”
Table A-1. Commonly Used IP Protocol Numbers
Protocol
Number C Name Protocol Full Name
0 ip IP Internet Protocol (pseudoprotocol number)
1 icmp ICMP Internet Control Message Protocol
3 ggp GGP Gateway-to-Gateway Protocol
6 tcp TCP Transmission Control Protocol
12 pup PUP PARC Universal Packet Protocol
17 udp UDP User Datagram Protocol