| ACK | Acknowledge |
| ARP | Address Resolution Protocol |
| ASN-1 | Abstract Syntax Notation One |
| BSD | Berkeley Software Distribution |
| CCITT | International Telephone and Telegraph Consultative Committee |
| CLNP | Connectionless Network Layer Protocol |
| CMIP | Common Management Information Protocol |
| CRC | Cyclic Redundancy Check |
| CSMA/CD | Carier Sense Multiple Access met Collision Detection. |
| DF | Don't Fragment |
| DNS | Domain Name System |
| DOD | Department Of Defence |
| EGP | Exterior Gateway Protocol |
| FDDI | Fiber Distributed Data Interface |
| FIN | No more data from sender |
| FO | Fragment Offset |
| FTP | File Transfer Protocol |
| HDLC | High-level Data Link Control |
| ICMP | Internet Control Message Protocol |
| IEN | Internet Experiment Note |
| IGMP | Internet Group Management Protocol |
| IHL | Internet Header Length |
| IP | Internet Protocol |
| ISN | Initiële Sequentie Nummer |
| ISO | International Organisation for Standardization |
| LAN | Local Area Netwerk |
| MF | More Fragment |
| MIB | Management Information Base |
| MSL | Maximum Segment Lifetime |
| MTU | Maximum Transmission Unit |
| NFS | Network File System |
| ORG | Organisation |
| OS | Operating System |
| OSI | Open System Interconnection |
| PDU | Protocol Data Unit |
| POP | Point Of Presence |
| PPP | Point-to-Point Protocol |
| PSH | Push function |
| RARP | Reverse Address Resolution Protocol |
| RFC | Request For Comment |
| RST | Reset the connection |
| SACK | Selective Acknowledge |
| SEQ | Sequence |
| SLIP | Serial Line Internet Protocol |
| SMI | Structure of Management Information |
| SMTP | Simple Mail Transfer Protocol |
| SNMP | Simple Network Management Protocol |
| SYN | Synchronize sequence numbers |
| TCP | Transmission Control Protocol |
| TFTP | Trivial File Transfer Protocol |
| TOS | Type Of Service |
| TP 4 | class 4 Transport Protocol |
| TTL | Time To Live |
| UDP | User Datagram Protocol |
| URG | Urgent Pointer field significant |
