| Protocol | Description |
| all | All Internet Protocol including TCP, UDP and ICMP |
| tcp | Transport Control Protocol |
| udp | User Datagram Protocol |
| icmp | Internet Control Message |
| igmp | Internet Group Management |
| ggp | Gateway-to-Gateway |
| ipencap | IP in IP (encapsulation) |
| st | Stream |
| cbt | cbt |
| egp | Exterior Gateway Protocol |
| igp | any private interior gateway |
| bbn-rcc-mon | BBN RCC Monitoring |
| nvp-ii | Network Voice Protocol |
| pup | PUP |
| argus | ARGUS |
| emcon | EMCON |
| xnet | Cross Net Debugger |
| chaos | Chaos |
| mux | Multiplexing |
| dcn-meas | DCN Measurement Subsystems |
| hmp | Host Monitoring |
| prm | Packet Radio Measurement |
| xns-idp | XEROX NS IDP |
| trunk-1 | Trunk-1 |
| trunk-2 | Trunk-2 |
| leaf-1 | Leaf-1 |
| leaf-2 | Leaf-2 |
| rdp | Reliable Data Protocol |
| irtp | Internet Reliable Transaction |
| iso-tp4 | ISO Transport Protocol Class 4 |
| netblt | Bulk Data Transfer Protocol |
| mfe-nsp | MFE Network Services Protocol |
| merit-inp | MERIT Internodal Protocol |
| dccp | Datagram Congestion Control Protocol |
| three-pc | Third Party Connect Protocol |
| idpr | Inter-Domain Policy Routing Protocol |
| xtp | XTP |
| ddp | Datagram Delivery Protocol |
| idpr-cmtp | IDPR Control Message Transport Proto |
| tp-plus-plus | TP++ Transport Protocol |
| il | IL Transport Protocol |
| ipv6 | Ipv6 |
| sdrp | Source Demand Routing Protocol |
| ipv6-route | Routing Header for IPv6 |
| ipv6-frag | Fragment Header for IPv6 |
| idrp | Inter-Domain Routing Protocol |
| rsvp | Reservation Protocol |
| gre | General Routing Encapsulation |
| mhrp | Mobile Host Routing Protocol |
| bna | BNA |
| esp | Encap Security Payload |
| ah | Authentication Header |
| i-nlsp | Integrated Net Layer Security |
| swipe | IP with Encryption |
| narp | NBMA Address Resolution Protocol |
| mobile | IP Mobility |
| tlsp | Transport Layer Security Protocol |
| skip | SKIP |
| ipv6-icmp | ICMP for IPv6 |
| ipv6-nonxt | No Next Header for IPv6 |
| ipv6-opts | Destination Options for IPv6 |
| cftp | CFTP |
| sat-expak | SATNET and Backroom EXPAK |
| kryptolan | Kryptolan |
| rvd | MIT Remote Virtual Disk Protocol |
| ippc | Internet Pluribus Packet Core |
| sat-mon | SATNET Monitoring |
| visa | VISA Protocol |
| ipcv | Internet Packet Core Utility |
| cpnx | Computer Protocol Network Executive |
| cphb | Computer Protocol Heart Beat |
| wsn | Wang Span Network |
| pvp | Packet Video Protocol |
| br-sat-mon | Backroom SATNET Monitoring |
| sun-nd | SUN ND PROTOCOL-Temporary |
| wb-mon | WIDEBAND Monitoring |
| wb-expak | WIDEBAND EXPAK |
| iso-ip | ISO Internet Protocol |
| vmtp | VMTP |
| secure-vmtp | SECURE-VMTP |
| vines | VINES |
| ttp | TTP |
| nsfnet-igp | NSFNET-IGP |
| dgp | Dissimilar Gateway Protocol |
| tcf | TCF |
| eigrp | EIGRP |
| ospfigp | OSPFIGP |
| sprite-rpc | Sprite RPC Protocol |
| larp | Locus Address Resolution Protocol |
| mtp | Multicast Transport Protocol |
| ax25 | AX.25 Frames |
| ipip | IP-within-IP Encapsulation Protocol |
| micp | Mobile Internetworking Control Pro. |
| scc-sp | Semaphore Communications Sec. Pro. |
| etherip | Ethernet-within-IP Encapsulation |
| encap | Encapsulation Header |
| gmtp | GMTP |
| ifmp | Ipsilon Flow Management Protocol |
| pnni | PNNI over IP |
| pim | Protocol Independent Multicast |
| aris | ARIS |
| scps | SCPS |
| qnx | QNX |
| a-or-n | Active Networks |
| ipcomp | IP Payload Compression Protocol |
| snp | Sitara Networks Protocol |
| compaq-peer | Compaq Peer Protocol |
| ipx-in-ip | IPX in IP |
| vrrp | Virtual Router Redundancy Protocol |
| pgm | PGM Reliable Transport Protocol |
| l2tp | Layer Two Tunneling Protocol |
| ddx | D-II Data Exchange (DDX) |
| iatp | Interactive Agent Transfer Protocol |
| stp | Schedule Transfer Protocol |
| srp | SpectraLink? Radio Protocol |
| uti | UTI |
| smp | Simple Message Protocol |
| sm | SM |
| ptp | Performance Transparency Protocol |
| isis | over IPv4 |
| fire | FIRE |
| crtp | Combat Radio Transport Protocol |
| crudp | Combat Radio User Datagram |
| sscopmce | sscopmce |
| iplt | iplt |
| sps | Secure Packet Shield |
| pipe | Private IP Encapsulation within IP |
| sctp | Stream Control Transmission Protocol |
| fc | Fibre Channel |
| rsvp-e2e-ignore | rsvp-e2e-ignore 134 RSVP-E2E-IGNORE |
| mobility | Header |
| udplite | udplite |
| mpls-in-ip | mpls-in-ip |
| manet | manet |
| hip | hip |
