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| Information Technology Acronyms |
ACK Acknowledgement
ACL Access control list
ADSL Asymmetric digital subscriber line
AES Advanced Encryption Standard
ANSI American National Standards Institute
API Application Programming Interface
ARP Address Resolution Protocol
ATM Asynchronous Transfer Mode
BGP Border Gateway Protocol (routing protocol)
BSS Basic service set (Wi-Fi)
CAT Category (e.g. CAT-5 cable)
CCITT Standards organization that has been replaced by ITU-T
CHAP Challenge-Handshake Authentication Protocol (PPP)
CIDR Classless Inter-Domain Routing
CIR Committed Information Rate (Frame Relay)
CLI Command line interpreter
CPE Customer premises equipment
CPU Central processing Unit
CRC Cyclical redundancy check
CRC-16-CCITT Cyclical redundancy check (X.25, HDLC)
CRT Cathode Ray Tube
CSMA/CA Carrier sense multiple access / collision avoidance
CSMA/CD Carrier sense multiple access / collision detection
CSU/DSU Channel service unit / data service unit
CMOS Comp metal-oxide semiconductor
DAM Database activity monitoring
DAM Digital asset management
DCE Data communications equipment
DEC Digital Equipment Corporation
DES Data Encryption Standard (obs. See AES)
DHCP Dynamic Host Configuration Protocol
DNS Domain Name System
DRAM Dynamic random-access memory
DSL Digital Subscriber Line
DSLAM Digital Subscriber Line Access Multiplexor
DTE Data Terminal Equipment
DMI Desktop Management Interface
EHA Ethernet Hardware Address (MAC address)
EIA Electronics Industry Alliance
EIGRP Enhanced Interior Gateway Routing Protocol
EOF End Of Frame (HDLC, etc.)
ESS Extended service set (Wi-Fi group)
FCC Federal Communications Commission (US)
FCS Frame check sequence (Ethernet)
FDDI Fiber Distributed Data Interface
FTP File Transfer Protocol
GBIC Gigabit interface converter
gbps Gigabit per second
GEPOF Gigabit Ethernet (over) Plastic Optical Fiber
HDLC High-level Data Link Control
HTTP Hypertext Transfer Protocol
HTTPS Hypertext Transfer Protocol Secure
IANA Internet Assigned Number Authority
ICMP Internet Control Message Protocol
IDF Intermediate distribution frame
IDS Intrusion Detection
IEEE Institute for Electrical and Electronic Engineers
IETF Internet Engineering Task Force
IMAP Internet Message Access Protocol
IP Internet Protocol
IPS Intrusion prevention system
IS-IS Intermediate System to Intermediate System (routing protocol)
ISDN Integrated Services Digital Network
ISP Internet service provider
ITU-T International Telecommunications Union
kbps Kilobit per second
LACP Link Aggregation Control Protocol
LAN Local area network
LAPB Link Access Procedure, Balanced (x.25)
LAPF Link-access procedure for frame relay
LLC Logical link control
MAC Media access control
MAM Media access management (related to Digital asset management)
MAN Metropolitan area network
Mbps Megabits per second
MC Multiple choice
MDF Main distribution frame
MIB Management information base (SNMP)
MoCA Multimedia over Coax Alliance
MPLS Multiprotocol Label Switching
MTU Maximum Transmission Unit
NAC Network access control
NAT Network Address Translation
NBMA Non-Broadcast Multiple Access (e.g. Frame Relay ATM)
NIC Network Interface Card
NRZ Non-return-to-zero
NRZI Non-return to zero inverted
NVRAM Non-volatile RAM
OSI Open System Interconnect (joint ISO and ITU standard)
OSPF Open Shortest Path First (routing protocol)
OUI Organization Unique Identifier
PAP Password authentication protocol
PAT Port address translation
PC Personal computer (host)
PIM Personal information manager
PIM Privileged Identity Management
PCM Pulse-code modulation
PDU Protocol data unit (such as segment, packet, frame, etc.)
POP3 Post Office Protocol, version 3
POP Point of presence
POST Power-on self-test
POTS Plain old telephone service
PPP Point-to-point Protocol
PPTP Point-to-Point Tunnelling Protocol
PTT Public Telephone and Telegraph
PVST Per-VLAN Spanning Tree
RADIUS Remote Authentication Dial-In User Service
RAM Random Access Memory
RARP Reverse ARP
RFC Request for Comments
RIP Routing Information Protocol
RLL Run-Length Limited
ROM Read-Only Memory
RSTP Rapid Spanning Tree Protocol
RTP Real-time Transport Protocol
RCP Royal College of Physicians
SDLC Synchronous Data Link Control
SDN Software Defined Networking
SFD Start-of-frame delimiter (Ethernet, HDLC, etc.)
SFP Small form-factor pluggable
S-HTTP Secure HTTP (rarely used)
SLARP Serial Line ARP (Address Resolution Protocol)
SLIP Serial Line Internet Protocol (obs.)
SMTP Simple Mail Transfer Protocol
SNA Systems Network Architecture (IBM)
SNAP SubNet Access Protocol
SNMP Simple Network Management Protocol
SOF Start of frame
SRAM Static random access memory
SSH Secure shell
SSID Service set identifier (Wi-Fi)
STP Spanning Tree Protocol
SYN (TCP) Synchronization
TCP/IP Transmission Control Protocol/Internet Protocol
TDM Time-division multiplexing
TFTP Trivial File Transfer Protocol
TIA Telecommunications Industry Alliance
TOFU Trust On First Use
UDP User Datagram Protocol
USB Universal Serial Bus
UTP Unshielded twisted pair
VC Virtual circuit
VLAN Virtual local area network
VLSM Variable-length subnet masking
VPN Virtual private network
W3C World Wide Web Consortium
WAN Wide-area network
WEP Wired Equivalent Privacy
Wi-Fi IEEE 802.11 (Wi-Fi Alliance)
WPA Wi-Fi Protected Access
www World Wide Web
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