### ACRONYMS

ACK | acknowledgment flag, TCP header
API | application program interface
ARP | Address Resolution Protocol
ARPANET | Advanced Research Projects Agency network
AS | autonomous system
ASCII | American Standard Code for Information Interchange
ASN.1 | Abstract Syntax Notation One
BER | Basic Encoding Rules
BGP | Border Gateway Protocol
BIND | Berkeley Internet Name Domain
BOOTP | Bootstrap Protocol
BPF | BSD Packet Filter
BSD | Berkeley Software Distribution
CIDR | classless interdomain routing
CIX | Commercial Internet Exchange
CLNP | Connectionless Network Protocol
CRC | cyclic redundancy check
CSLIP | compressed SLIP
CSMA | carrier sense multiple access
DCE | Distributed Computing Environment
DDN | Defense Data Network
DF | don't fragment flag, IP header
DHCP | Dynamic Host Configuration Protocol
DLPI | Data Link Provider Interface
DNS | Domain Name System
DSAP | Destination Service Access Point
DTS | Distributed Time Service
DVMRP | Distance-Vector Multicast Routing Protocol
EBONE | European IP Backbone
EGP | Exterior Gateway Protocol
EOL | end of option list
FCS | frame check sequence
FDDI | Fiber Distributed Data Interface
FIFO | first in, first out
FIN | finish flag, TCP header
FQDN | fully qualified domain name
FTP | File Transfer Protocol
HDLC | high-level data link control
HELLO | routing protocol
IAB | Internet Architecture Board
IANA | Internet Assigned Number Authority
ICMP | Internet Control Message Protocol
IDRP | Interdomain Routing Protocol
IEEE | Institute of Electrical and Electronics Engineers
IEN | Internet Experiment Notes
IESG | Internet Engineering Steering Group
IETF | Internet Engineering Task Force
IGMP | Internet Group Management Protocol
IGP | interior gateway protocol
IP | Internet Protocol
IRTF | Internet Research Task Force
IS-IS | Intermediate System to Intermediate System Protocol
ISN | initial sequence number
ISO | International Organization for Standardization
ISOC | Internet Society
LAN | local area network
LBX | low bandwidth X
LCP | link control protocol
LFN | long fat network
LIFO | last in, first out
LLC | logical link control
LSRR | loose source and record route
MBONE | multicast backbone
MIB | management information base
MILNET | Military Network
MIME | multipurpose Internet mail extensions
MSL | maximum segment lifetime
MSS | maximum segment size
MTA | message transfer agent
MTU | maximum transmission unit
NCP | Network Control Protocol
NFS | Network File System
NIC | Network Information Center
NIT | network interface tap
NNTP | Network News Transfer Protocol
NOAO | National Optical Astronomy Observatories
NOP | no operation
NSFNET | National Science Foundation network
NSI | NASA Science Internet
NTP | Network Time Protocol
NVT | network virtual terminal
OSF | Open Software Foundation
OSI | open systems interconnection
OSPF | open shortest path first
PAWS | protection against wrapped sequence numbers
PDU | protocol data unit
POSIX | Portable Operating System Interface
PPP | Point-to-Point Protocol
PSH | push flag, TCP header
RARP | Reverse Address Resolution Protocol
RFC | Request for Comment
RIP | Routing Information Protocol
RPC | remote procedure call
RR | resource record
RST | reset flag, TCP header
RTO | retransmission time out
RTT | round-trip time
SACK | selective acknowledgment
SLIP | Serial Line Internet Protocol
SMI | structure of management information
SMTP | Simple Mail Transfer Protocol
SNMP | Simple Network Management Protocol
SSAP | source service access point
SSRR | strict source and record route
SWS | silly window syndrome
SYN | synchronize sequence numbers flag, TCP header
TCP | Transmission Control Protocol
TFTP | Trivial File Transfer Protocol
TLI | Transport Layer Interface
TOS | type-of-service
TTL | time-to-live
TUBA | TCP and UDP with bigger addresses
Telnet | remote terminal protocol
UDP | User Datagram Protocol
URG | urgent pointer flag, TCP header
UTC | Coordinated Universal Time
UUCP | Unix-to-Unix Copy
WAN | wide area network
WWW | World Wide Web
XDR | external data representation
XID | transaction ID
XTI | X/Open Transport Layer Interface