Protocol Numbers Protocol Numbers * 0 HOPOPT IPv6 Hop-by-Hop Option * 1 ICMP Internet Control Message * 2 IGMP Internet Group Management * 3 GGP Gateway-to-Gateway * 4 IP IP in IP (encapsulation) * 5 ST Stream * 6 TCP Transmission Control * 7 CBT CBT * 8 EGP Exterior Gateway Protocol * 9 IGP any private interior gateway (used by Cisco for their IGRP) * 10 BBN-RCC-MON BBN RCC Monitoring * 11 NVP-II Network Voice Protocol * 12 PUP PUP * 13 ARGUS ARGUS * 14 EMCON EMCON * 15 XNET Cross Net Debugger * 16 CHAOS Chaos * 17 UDP User Datagram * 18 MUX Multiplexing * 19 DCN-MEAS DCN Measurement Subsystems * 20 HMP Host Monitoring * 21 PRM Packet Radio Measurement * 22 XNS-IDP XEROX NS IDP * 23 TRUNK-1 Trunk-1 * 24 TRUNK-2 Trunk-2 * 25 LEAF-1 Leaf-1 * 26 LEAF-2 Leaf-2 * 27 RDP Reliable Data Protocol * 28 IRTP Internet Reliable Transaction * 29 ISO-TP4 ISO Transport Protocol Class 4 * 30 NETBLT Bulk Data Transfer Protocol * 31 MFE-NSP MFE Network Services Protocol * 32 MERIT-INP MERIT Internodal Protocol * 33 SEP Sequential Exchange Protocol * 34 3PC Third Party Connect Protocol * 35 IDPR Inter-Domain Policy Routing Protocol * 36 XTP XTP * 37 DDP Datagram Delivery Protocol * 38 IDPR-CMTP IDPR Control Message Transport Proto * 39 TP++ TP++ Transport Protocol * 40 IL IL Transport Protocol * 41 IPv6 Ipv6 * 42 SDRP Source Demand Routing Protocol * 43 IPv6-Route Routing Header for IPv6 * 44 IPv6-Frag Fragment Header for IPv6 * 45 IDRP Inter-Domain Routing Protocol * 46 RSVP Reservation Protocol * 47 GRE General Routing Encapsulation * 48 MHRP Mobile Host Routing Protocol * 49 BNA BNA * 50 ESP Encapsulating Security Payload * 51 AH Authentication Header * 52 I-NLSP Integrated Net Layer Security TUBA * 53 SWIPE IP with Encryption * 54 NARP NBMA Address Resolution Protocol * 55 MOBILE IP Mobility * 56 TLSP Transport Layer Security Protocol using Kryptonet key management * 57 SKIP SKIP * 58 IPv6-ICMP ICMP for IPv6 * 59 IPv6-NoNxt No Next Header for IPv6 * 60 IPv6-Opts Destination Options for IPv6 * 61 any host internal protocol * 62 CFTP CFTP * 63 any local network * 64 SAT-EXPAK SATNET and Backroom EXPAK * 65 KRYPTOLAN Kryptolan * 66 RVD MIT Remote Virtual Disk Protocol * 67 IPPC Internet Pluribus Packet Core * 68 any distributed file system * 69 SAT-MON SATNET Monitoring * 70 VISA VISA Protocol * 71 IPCV Internet Packet Core Utility * 72 CPNX Computer Protocol Network Executive * 73 CPHB Computer Protocol Heart Beat * 74 WSN Wang Span Network * 75 PVP Packet Video Protocol * 76 BR-SAT-MON Backroom SATNET Monitoring * 77 SUN-ND SUN ND PROTOCOL-Temporary * 78 WB-MON WIDEBAND Monitoring * 79 WB-EXPAK WIDEBAND EXPAK * 80 ISO-IP ISO Internet Protocol * 81 VMTP VMTP * 82 SECURE-VMTP SECURE-VMTP * 83 VINES VINES * 84 TTP TTP * 85 NSFNET-IGP NSFNET-IGP * 86 DGP Dissimilar Gateway Protocol * 87 TCF TCF * 88 EIGRP EIGRP * 89 OSPFIGP OSPFIGP * 90 Sprite-RPC Sprite RPC Protocol * 91 LARP Locus Address Resolution Protocol * 92 MTP Multicast Transport Protocol * 93 AX.25 AX.25 Frames * 94 IPIP IP-within-IP Encapsulation Protocol * 95 MICP Mobile Internetworking Control Protocol * 96 SCC-SP Semaphore Communications Sec. Protocol * 97 ETHERIP Ethernet-within-IP Encapsulation * 98 ENCAP Encapsulation Header * 99 any private encryption scheme * 100 GMTP GMTP * 101 IFMP Ipsilon Flow Management Protocol * 102 PNNI PNNI over IP * 103 PIM Protocol Independent Multicast * 104 ARIS ARIS * 105 SCPS SCPS * 106 QNX QNX * 107 A/N Active Networks * 108 IPComp IP Payload Compression Protocol * 109 SNP Sitara Networks Protocol * 110 Compaq-Peer Compaq Peer Protocol * 111 IPX-in-IP IPX in IP * 112 VRRP Virtual Router Redundancy Protocol * 113 PGM PGM Reliable Transport Protocol * 114 any 0-hop protocol * 115 L2TP Layer Two Tunneling Protocol * 116 DDX D-II Data Exchange (DDX) * 117 IATP Interactive Agent Transfer Protocol * 118 STP Schedule Transfer Protocol * 119 SRP SpectraLink Radio Protocol * 120 UTI UTI * 121 SMP Simple Message Protocol * 122 SM SM * 123 PTP Performance Transparency Protocol * 124 ISIS over IPv4 * 125 FIRE * 126 CRTP Combat Radio Transport Protocol * 127 CRUDP Combat Radio User Datagram * 128 SSCOPMCE * 129 IPLT * 130 SPS Secure Packet Shield * 131 PIPE Private IP Encapsulation within IP * 132 SCTP Stream Control Transmission Protocol * 133 FC Fibre Channel * 134 RSVP-E2E-IGNORE * 135-254 Unassigned * 255 Reserved