ACK (ACKnowledgment) TCP header confirm mark API (Application Programming Interface) application programming interface ARP (Address Resolution Protocol) ARP AR PA NET (Defense Advanced Research Project Agency NETwork) (US) Department of Defense Advanced Research Projects Agency AS ( Autonomous System Autonomous System ASCII (American Standard Code for Information Interchange) USA Information Exchange Standard Code ASN.1 (Abstract Syntax Notation ONE) Abstract Syntax Notes 1 BER (Basic Encoding Rule) Basic Code Rules BGP (Border Gateway Protocol) Boundary Gateway agreement BIND (Berkeley Internet Name domain) Berkeley I nternet domain BOOTP (bOOTstrap protocol) bootstrap protocol BPF (BSD packet filter) BSD packet filter CIDR (Classless InterDomain Routing) Classless inter-domain Routing CIX (commercial Internet Exchange) commercial Internet exchange CLNP (ConnectionLessNetwork protocol) connectionless network protocol CRC (cyclic redundancy Check) a cyclic redundancy check CSLIP (compressed SLIP) compressed SLIP CSMA (carrier Sense multiple access) carrier Sense multiple access DCE (Data Circuit-terminating Equipment) Data circuit termination device DDN (DEFENSE DATA NETWORK) National Defense Data Network DF (Don't Fragment) IP Head Differential Sign DHCP (Dynamic Host ConfigurationProtocol) Dynamic Host Configuration Protocol D LPI (Data Link Provider Interface Data Link Provider Interface DNS (Domain Name System) Domain Name System DSAP (Destination Service Access Point) Destination Service Access Point DSLAM (DSL Access Multiplexer) Digital User Line Access Multiplexer DSSS (Direct Sequence Spread Spectrum) Direct Sequence Spread Spectrum DTS (Distributed Time Service) Distributed Time Services DVMRP (Distance Vector Multicast Routing Protocol) Distance Distance Position Protocol EBONE (European IP Backbone) European IP Sninding Network EOL (End of Option List) option Inventory EGP (External Gateway Protocol) External Gateway Protocol EIA (Electronic Industries Association) US Electronics Industry Association FCS (FRME CHECK SEQUENCE) Frame Check Sequence FDDI (Fiber Distributed Data Interface) Fiber Distributed Data Interface FIFO (First in,
First OUT Advanced FIN (FINISH) TCP First End Sign FQDN (FULL Qualified Domain Name "full qualified domain name FTP (File Transfer Protocol) File Transfer Protocol HDLC (High-Level Data Link Control) Advanced Data Link Control HELLO routing protocol IAB (Internet architecture Board) Internet architecture Board IANA (Internet assigned numbers Authority) Internet assigned numbers Authority ICMP (Internet control message protocol) Internet control message protocol IDRP (interDomain Routing protocol) inter-domain routing protocol IEEE ( Institute of electrical and Electronics Engineering) (United States) electrical and Electronics IEN (Internet experiment Notes) Internet test Notes IESG (Internet Engineering Steering group) Internet Engineering Steering group IETF (Internet Engineering Task Force) specialized group of the Internet Engineering IGMP (Internet group Management Protocol Internet Group Management Protocol IGP (Interior Gateway Protocol) Internal Gateway Protocol IMAP (Internet Message Access Protocol) Internet Packet Acquisition Protocol IP (Internet Protocol) Internet Protocol I RTF (Internet Research Task Force) Internet Research Expert Group IS-IS ( Intermediate TO Intermediate Syste MPROTOCOL) Intermediate System to Intermediate System ISN (Initial Sequence Number) Initial Number ISO (INTERNATION) Al Organization for Standardization Lifo (Last IN,
First OUT Backward LLC (LOSE Source and Record Route) Loose Source Station and Record Route MBONE (Multicast Backbone on The Internet "multicast main network MIB on the Internet (Management Information Base) Manage Information Library MIME (MULTIPURPOSE Internet Mail Extensions) Universal I NTERNET Mail Expansion MSL (Maximum Segment Lifetime) News Section Maximum Surplus Time MSS (Maximum Segment Size) Maximum News Segment Length M TA ( Message Transfer Agent) Packet Transfer Agent MTU (Maximum Transmission Unit) Maximum Transmission Unit NCP (Network File System) Network File System NIC (Network Information Center) Network Information Center NIT (Network Interface TAP) Network interface plug (a program of S Un Company) NNTP (NetWork News Transfer Protocol) Network News Transfer Protocol NOAO (National Optical Astronomy Observatories) Country Optical Optical Observatory NOP (No Operation) No NSFNET (National Science Foundation Network) National Science Fund Network NSI (NASA Science Internet) (USA) NASA I NTERNET NTP (Network Time Protocol) Network Time Protocol NVT (Network Virtual Terminal) Network Virtual Terminal OSF (Open Software Foudation) Open Software Fund OSI (O pen Systems Interconnection) Open Systems Interconnection OSPF (Open Shortest Path First) Open Shortest Path First PAWS (Protection Against Wrapped Sequence number) to prevent wraparound number PDU (Protocol Data Unit) protocol data unit POSIX (Portable Operating System Interface) Portable Operating System Interface PPP (Point-to-Point Protocol) Point-to-Point Protocol PSH (PUSH) TCP First Emergency Sign Rarp (Reverse Address Resolution Protocol) Inverse Address Resolution Protocol RFC (Request for Comments) Internet Document, with a small number of standards Document RIP (ROUTING INFORMATION PROTOCOL) Routing Information Protocol RPC (Remote Procedure Call) Remote Procedure Call RR (Resource Record) Resource Record RST (RESET) TCP header Reset flag RTO (RoundMission Time OUT) Re-transfer Timeout RTT (Round-Trip TIME) Round-trip time Sack (Selective Acknowledgment) Select Confirm SLIP (Serial Line Internet Protocol) Serial Line I NTERNET Protocol SMI (STRU
