| ANSI | American National Standards Institute |
| ARP | Address Resolution Protocol |
| AS | Autonomes System |
| ASIC | Application Specific Integrated Circuit |
| ATM | Asynchronous Transfer Mode |
| B2B | Business to Business |
| B2C | Business to Consumer |
| BGP | Border Gateway Protocol |
| BPDU | Bridge Protocol Data Unit |
| CDDI | Copper Distributed Data Interface |
| CIDR | Classless Inter-Domain Routing |
| CRC | Cyclic Redundancy Check |
| CSMA/CD | Carrier Sense Multiple Access/ Collision Detect |
| DIX | Dec/Intel/Xerox |
| DMZ | Demilitarisierte Zone |
| DNS | Domain Name System |
| EGP | Exterior Gateway Protocol |
| FAT | File Allocation Table |
| FDDI | Fiber Distributed Data Interface |
| Fdx | Full Duplex |
| FTP | File Transfer Protocol |
| FW | Firewall |
| HA | High Availability |
| Hdx | Half Duplex |
| HE | Höheneinheiten |
| HSRP | Hot Standby Routing Protocol |
| HTTP | Hyper Text Transfer Protocol |
| ICMP | Internet Control Message Protocol |
| ID | Identification |
| IEEE | Institute of Electrical and Electronic Engineers |
| IETF | The Internet Engineering Taskforce |
| IGP | Interior Gateway Protocol |
| IHL | IP Header Lenght |
| IMUX | Invers-Multiplexer |
| IP | Internet Protocol |
| IPv4/6 | Internet Protocol Version 4/6 |
| IS-IS | Intermediate System to Intermediate System |
| ISP | Internet Service Provider |
| ISO | International Standards Organisation |
| L2/3/4 | Layer 2/3/4 |
| LAN | Local Area Network |
| LANE | Local Area Network Emulation |
| LB | Load Balancing |
| LLC | Logical Link Control |
| LS | Load Sharing |
| MAC | Media Access Control |
| MSS | Maximum Segment Size |
| NAPT | Network Address Port Translation |
| NAT | Network Address Translation |
| NIC | Network Interface Card |
| OSI | Open Systems Interconnected |
| OSPF | Open Shortest Path First |
| PA | Provider assigned |
| PI | Provider Independent |
| PPP | Point to Point Protocol |
| QoS | Quality of Service |
| RAID | Redundant Array of Independent/Inexpensive Disks |
| RAM | Random Access Memory |
| RFC | Request for Comment |
| RIP | Routing Information Protocol |
| RIPE | Réseaux IP Européens |
| SLB | Server Load Balancing |
| SMTP | Simple Mail Transfer Protocol |
| SNA | Systems Network Architekture |
| SNMP | Simple Network Management Protocol |
| SPoF | Single Point of Failure |
| SPS | Standby Power System |
| TCP | Transport Control Protocol |
| ToS | Type of Service |
| TR | Token Ring |
| TTL | Time to Live |
| UDP | User Datagram Protocol |
| UPS | Uninterruptable Power Supply |
| USV | Unterbrechungsfreie Stromversorgung |
| VIP | Virtuelle IP-Adresse |
| VLAN | Virtual Local Area Network |
| VLSM | Variable Length Subnet Mask |
| VRID | Virtual Router Identifier |
| VRRP | Virtual Router Redundancy Protocol |
| VS | Virenscanner |
| WAN | Wide Area Network |