| A | B |
|---|
| AAA | authentication, authorization, and accounting |
| ACK | acknowledgement |
| ACL | access control list |
| AES | Advanced Encryption Standard |
| AF | Assured Forwarding |
| AH | authentication header |
| ANSI | American National Standards Institute |
| AM | amplitude modulation |
| AP | Access Point |
| API | Application program interface |
| APIPA | Automatic Private IP Addressing |
| ARP | Address Resolution Protocol |
| AS | authentication service |
| ATA | analog telephone adapter |
| ATM | Asynchronous Transfer Mode |
| BGP | Border Gateway Protocol |
| BNC | Bayonet Neil-Concelman (Or British Naval Connector) |
| BOOTP | Bootstrap protocol |
| BRI | Basic Rate Interface |
| BSS | basic service set |
| BSSID | basic service set identifier |
| CCIE | Cisco Certified Internetwork Expert |
| CCNA | Cisco Certified Network Associate |
| CHAP | Challenge Handshake Authentication Protocol |
| CIDR | Classes Interdomain Routing |
| CIFS | Common Internet File System |
| CIR | committed information rate |
| CN | common name |
| CO | central office |
| CSMA/CD | Carrier Sense Multiple Access with Collision Detection |
| CSMA/CA | Carrier Sense Multiple Access with Collision Avoidance |
| CRC | Cyclic redundancy check |
| CSU | channel service unit |
| DES | Data Encryption Standard |
| DHCP | Dynamic Host Configuration Protocol |
| DMZ | demilitarized zone |
| DN | distinguished name |
| DNAT | Dynamic Network Address Translation |
| DNS | Domain Name System or Domain Name Server |
| DS0 | Digital signal, level 0 |
| DSL | digital subscriber line |
| DSLAM | DSL access multiplexer |
| DSSS | direct sequence spread spectrum |
| DSU | data service unit |
| DTE | data terminal equipment |
| DWDM | dense wavelength division multiplexing |
| EAP | Extensivle authentication protocol |
| ECC | error correction mode |
| EF | Expedited forwarding |
| EIA | Electronics Industries Alliance |
| EIGRP | Enhanced Interior Gateway Routing Protocol |
| EMI | electromagnetic interference |
| ESS | extended service set |
| ESSID | extended service set identifier |
| FCS | frame check sequence |
| FDM | frequency division multiplexing |
| FHSS | frequency hopping spread spectrum |
| FM | frequency modulation |
| FoIP | fax over IP |
| FTP | File Transfer Protocol |
| HFC | Hybrid fiber-coax |
| HTTP | Hypertext Transfer Protocol |
| HTTPS | HTTP over Secure Sockets Layer |
| IAB | Internet Architecture Board |
| IANA | Internet Assigned Numbers Authority |
| ICA | Independent Computing Architecture |
| ICANN | Internet Corporation for Assigned Names and Numbers |
| ICMP | Internet Control message Protocol |
| ICS | Internet Connection Sharing |
| IDF | Intermediate distribution frame |
| IDS | Intrusion Detection System |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| IGMP | Interent Group Management Protocol or Internet Group Multicast Protocol |
| IKE | Internet Key Exchange |
| IMAP | Internet Message Access Protocol |
| IP | Internet Protocol |
| IPS | Intrusion-prevention system |
| IPSec | Internet Protocol Security |
| IPTV | IP Television |
| IRC | Internet Relay Chat |
| IRQ | Interrupt request |
| ISA | Industry Standard Architecture |
| L2TP | Layer 2 Tunneling Protocol |
| LLC | Logical Link Control |
| LOS | line of sight |
| lpd | line printer daemon |
| MAC | Media Access Control |
| MCSE | Microsoft Certified Systems Engineer |
| MCU | multipoint control unit |
| MDF | main distribution frame |
| MGC | media gateway controller |
| MGCP | media gateway control protocol |
| MIB | Management Information Base |
| MMF | multimode fiber |
| MPLS | multiprotocol label swiching |
| MRTG | multi router traffic grapher |
| MS-CHAP | Microsoft Challenge Handshake Authentication Protocol |
| mtr | my traceroute |
| MT-RJ | mechanical transfer-registered jack |
| MTU | maximum transmission unit |
| NAS | network attached storage |
| NAT | Network Address Translation |
| NEXT | near end cross talk |
| NFS | network file system |
| NIC | network interface card |
| NIU | network interface unit |
| NNTP | Network News Transfer Protocol or Network News Transport protocol |
| NOS | network operating system |
| NSP | network service provider |
| OSPF | Open shortest path first |
| OSI | Open Systems Interconnection |
| OTDR | optical time domain reflectometer |
| OU | organizational unit |
| P2P | peer to peer |
| PAN | personal area network |
| PAT | Port address translation |
| PBX | private branch exchange |
| PCI | Peripheral component interconnect |
| PCMCIA | Personal Computer Memory Card International Association |
| PD | powered device |
| PDU | protocol data unit |
| PKI | public key infrastructure |
| PoE | Power over Ethernet |
| POP | Post office protocol |
| PPPoE | Point to Point Protocol over Ethernet |
| PPTP | Point to Point tunneling Protocol |
| PRI | Primary Rate Interface |
| PSE | power sourcing equipment |
| PSTN | Public Switched Telephone Network |
| PVC | permanent virtual circuit |
| QoS | Quality of Service |
| RADIUS | Remote Authentication Dial-in User Service |
| RAID | Redundant Array of Independent (or Indexpensive) disks |
| RARP | Reverse Address Resolution Protocol |
| RAS | Remote Access Service |
| RDN | relative distinguished name |
| RDP | Remote Desktop Protocol |
| RIP | Routing Information Protocol |
| RIR | Regional Internet Registry |
| RRAS | Routing and Remote Access Service |
| RSVP | Resource Reservation Protocol |
| RTCP | Real-time Transport Control Protocol |
| RTP | Real-time Transport Protocol |
| RTS/CTS | Request to Send/Clear to Send |
| RTT | round trip time |
| SAN | storage area network |
| SC | subscriber connector or standard connector |
| SCP | Secure CoPy |
| SDH | Synchronous Digital Hierarchy |
| SFD | start-of-frame delimeter |
| SFTP | Secure File Transfer Protocol |
| SIP | Session Initiation Protocol |
| SLIP | Serial Line Internet Protocol |
| SMB | Server Message Block |
| SMF | single-mode fiber |
| SSH | Secure Shell |
| SSID | service set identifier |
| SSL | Secure sockets layer |
| SYN | synchronization |
| SVC | switched virtual circuit |
| SYN-ACK | Sychronization-acknowledgement |
| TA | terminal adapter |
| TACACS | Terminal Access Controller Access Control System |
| TCP | Transmission Control Protocol |
| TCP/IP | Transmission Control Protocol/Internet Protocol |
| TDM | time division multiplexing |
| TE | terminal equipment |
| TFTP | Trivial File Transfer Protocol |
| TGS | Ticket-granting service |
| TIA | Telecommunications Industry Association |
| TKIP | Temporal Key Integrity Protocol |
| TLD | top-level domain |
| TLS | Transport Layer Security |
| TTL | time to live |
| UPN | user principal name |
| UTP | unshielded twisted pair |
| VLAN | virtual local area network |
| VNC | virtual network computing |
| VoIP | voice over IP |
| VPN | virtual private network |
| WAN | wide area network |
| WEP | wired equivalent privacy |
| WLAN | wireless LAN |
| WPA | Wi-Fi Protected Access |
