| AAP | Address Allocation Protocol |
| AD | Area Director |
| ADSL | Asymmetric Digital Subscriber Line |
| API | Application Programming Interface |
| APNIC | Asia Pacific Network Information Centre |
| ARIN | American Registry for Internet Numbers |
| ARP | Address Resolution Protocol |
| AS | Autonomous System |
| ASN | Autonomous System Number |
| ASP | Application Service Provider |
| ATM | Asynchronous Transfer Mode |
| AfNOG | African Network Operations Group |
| AfriNIC | African Network Information Centre |
| BCP | Best Current Practices |
| BGP | Border Gateway Protocol |
| BoF | Birds of a Feather |
| CDN | Content Distribution Network, Content Delivery Network: a network of servers |
| CGN | Carrier Grade NAT (Network Address Translation) |
| CPE | Customer Provided Equipment |
| DARPA | Defense Advanced Research Projects Agency |
| DDoS | Distributed Denial of Service |
| DHCP | Dynamic Host Configuration Protocol |
| DHT | Distributed Hash Table |
| DNS | Domain Name System |
| DNSSEC | Domain Name System Security Extensions |
| DOCSIS | Data over Cable Service Interface Specification |
| DSL | Digital Subscriber Line |
| DTN | Delay-Tolerant Networking |
| EPP | Extensible Provisioning Protocol |
| FAQ | Frequently Asked Questions |
| FTP | File Transfer Protocol |
| HIP | Host Identity Protocol |
| HMAC | Hash Message Authentication Code |
| HTTP | Hypertext Transfer Protocol |
| IAB | Internet Architecture Board |
| IAD | IETF Administrative Director |
| IANA | Internet Assigned Numbers Authority |
| IAOC | IETF Administrative Oversight Committee |
| IASA | IETF Administrative Support Activity |
| ICANN | Internet Corporation for Assigned Names and Numbers |
| ICMP | Internet Control Message Protocol |
| ID | Internet Draft |
| IDN | Internationalized Domain Name |
| IDNAbis | Internationalized Domain Name in Applications (Revised) |
| IEEE | Institute of Electrical and Electronics Engineers |
| IESG | Internet Engineering Steering Group |
| IETF | Internet Engineering Task Force |
| IP | Internet Protocol |
| IPR | Intellectual Property Rights |
| IPsec | Internet Protocol Security |
| IPv4 | Internet Protocol version 4 |
| IPv6 | Internet Protocol version 6 |
| IRSG | Internet Research Steering Group |
| IRTF | Internet Research Task Force |
| IS-IS | Intermediate system to intermediate system |
| ISOC | Internet Society |
| ISP | Internet Service Provider |
| ITU-T | International Telecommunication Union-Telecommunication Standardization Sector |
| IXP | Internet Exchange Point |
| JWT | Joint Working Team |
| L2TP | Layer 2 Tunnelling Protocol |
| LACNIC | Latin American and Caribbean Network Coordination Centre |
| LDAP | Lightweight Directory Access Protocol |
| LDP | Label Distribution Protocol |
| LIR | Local Internet Registry |
| LTE | Long Term Evolution is a project of the |
| MAC | Message Authentication Code |
| MD5 | Message Digest Algorithm |
| MPLS | Multiprotocol Label Switching |
| MPLS | TE Multiprotocol Label Switching Traffic Engineering |
| MPLS-TP | Multiprotocol Label Switching-Transport Profile |
| MTU | Maximum Transmission Unit |
| NAT | Network Address Translation |
| NAT-PMP | Network Address Translation-Port Mapping Protocol |
| NAT-PT | Network Address Translation-Protocol Translation |
| NOC | Network Operations Centre |
| NREN | National Research and Education Network |
| NSF | National Science Foundation |
| NSRC | Network Startup Resource Centre |
| NomCom | Nominations Committee |
| OASIS | Organization for the Advancement of Structured Information Standards |
| OECD | Organisation for Economic Co-operation and Development |
| OS | Operating System |
| OSI | Open Systems Interconnection Reference Model |
| OSS | Open Source Software |
| P2P | Peer-to-Peer |
| PI | Provider Independent |
| PIM | Protocol Independent Multicast |
| PIM-SM | Protocol Independent Multicast-Sparse Mode |
| PKIX | Public-Key Infrastructure |
| POP | Point of Presence |
| QoS | Quality of Service |
| RFC | Request For Comments |
| RFID | Radio-Frequency Identification |
| RFP | Request For Proposals |
| RG | Research Group |
| RIPE | Réseaux IP Européens (French for "European IP Networks") |
| RIR | Regional Internet Registry |
| SDO | Standards Development Organization |
| SDP | Session Description Protocol |
| SHA-1 | Secure Hash Algorithm |
| SIP | Session Initiation Protocol |
| SNMP | Simple Network Management Protocol |
| SSH | Secure Shell (protocol) |
| STUN | Simple Traversal of User Datagram Protocol [UDP] Through |
| T-MPLS | Transport-Multiprotocol Label Switching |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TLD | Top-Level Domain |
| TLS | Transport Layer Security |
| TTL | Time To Live |
| UDP | User Datagram Protocol |
| UNDP | United Nations Development Programme |
| UPnP | Universal Plug and Play |
| URI | Uniform Resource Identifier |
| URL | Uniform Resource Locator |
| VPN | Virtual Private Network |
| VSAT | Very Small Aperture Terminal |
| VoIP | Voice over Internet Protocol |
| W3C | World Wide Web Consortium |
| WG | Working Group |
| WLAN | Wireless Local Area Network |
| WPAN | Wireless Personal Area Network |
| XML | Extensible Markup Language |
| XML-RPC | Extensible Markup Language – Remote Procedure Call |
| ccTLD | country code Top-Level Domain |
| gTLD | generic Top-Level Domain |
