| ARP | Address Resolution Protocol |
| AS | Autonomous System |
| BGP | Border Gateway Protocol |
| CIDR | Classless Inter-Domain Routing |
| DNS | Domain Name System |
| EGP | Exterior Gateway Protocol |
| ES | End System |
| FTP | File Transfer Protocol |
| HTML | HyperText Markup Language |
| HTTP | HyperText Transfer Protocol |
| ICMP | Internet Control Message Protocol |
| IGMP | Internet Group Management Protocol |
| IGP | Interior Gateway Protocol |
| IP | Internet Protocol |
| IS | Intermediate System |
| MIB | Management Information Base |
| NNTP | Network News Transfer Protocol |
| NFS | Network File System |
| OSPF | Open Shortest Path First |
| POP | Post Office Protocol |
| PPP | Point-to-Point Protocol |
| RFC | Request For Comment |
| RIP | Routing Information Protocol |
| RPC | Remote Procedure Call |
| RR | Resource Record |
| SLIP | Serial Line Internet Protocol |
| SMTP | Simple Mail Transfer Protocol |
| SNMP | Simple Network Management Protocol |
| TCP | Transmission Control Protocol |
| TCP/IP | See TCP and IP |
| TFTP | Trivial File Transfer Protocol |
| UDP | User Datagram Protocol |
| URL | Universal Resource Locator |