Glossary of Acronyms

AAAA	authentication, authorization, accounting, and allocation
ABR	available bit rate
ACL	access control list
AF	assured forwarding
AH	authentication header
API	application programming interface
AR	acceptance review
ARCP	asynchronous remote copy
ARP	Address Resolution Protocol
AS	autonomous system
ATM	asynchronous transfer mode
AToM	ATM monitoring
BE	best effort
BER	bit error rate
BGPv4	Border Gateway Protocol version 4
BSD	Berkeley Software Distribution
BUS	broadcast/multicast server
CA	certificate authority
CAC	call admission control
CAD	computer-aided design/computer-aided drawing
CBC	cipher block chaining
CBQ	class-based queuing
CBR	constant bit rate
CD	compact disk
CDN	content-delivery network
CDR	critical design review
CF	composite flow
CHAP	Challenge-Response Authentication Protocol
CIDR	classless interdomain routing
CIR	committed information rate
CLI	command line interface
CLR	cell loss ratio
CMIP	Common Management Information Protocol
CMOT	CMIP over TCP/IP
CMR	cell misinsertion ratio
COPS	common open policy services
CORBA	common object request broker architecture
CoS	class of service
COTS	commercial off the shelf
CPU	central processing unit
CRM	customer relationship management
CT	computed tomography
DES	data-encryption standard
DET	deterministic
DHCP	Dynamic Host Configuration Protocol
DiffServ	differentiated services
DMZ	demilitarized zone
DNS	domain name system
DR	default route
DSCP	differentiated services code point
DSL	digital subscriber loop
DSx	digital signal (x 1, 3)
DSU	data service unit
dWDM	dense wavelength division multiplexing
EBGP	external BGP
ECS	engineering compute server
EF	expedited forwarding
EGP	External Gateway Protocol
EMS	element management system
ENET	Ethernet
EOC	extended operational capability
ERP	enterprise resource planning
ESP	encapsulating security payload
f	flow
FA	functional area
FAA	Federal Aviation Administration
FB	flow boundary
FCAPS	fault, configuration, accounting, performance, and security
FCIP	fiber channel over IP
FDDI	fiber distributed data interface
FE	Fast Ethernet
FIFO	first in first out
FMECA	failure modes, effects, and criticality analysis
FTE	full-time equivalent/full-time employee
FTP	File Transfer Protocol
FY	fiscal year
Gb/s	gigabits per second
GigE	Gigabit Ethernet
HDLC	high-level data link control
HiPPI	high-performance parallel interface
HMAC	hash-function message authentication code
HRT	human response time
HTTP	HyperText Transfer Protocol
HVAC	heating, vacuum, air conditioning
HW or H/W	hardware
IBGP	internal BGP
ICD	interface control description
ICMP	Internet Control Message Protocol
ID	identifier
IETF	Internet Engineering Task Force
iFCP	Internet Fiber Channel Protocol
IGP	Interior Gateway Protocol
iLAN	isolation LAN
INTD	interaction delay
IntServ	integrated services
I/O	input/output
IOC	initial operational capability
IP	Internet Protocol
IPSec	IP security
ISP	Internet service provider
IT	information technology
IXC	interexchange carrier
Kb/s	kilobits per second
KB/s	kilobytes per second
L	link
L2F	layer 2 forwarding
L2TP	layer 2 Tunneling Protocol
LAN	local area network
LANE	LAN emulation
LDAP	Lightweight Directory Access Protocol
LEC	LAN emulation client
LECS	LAN emulation connection server
LES	LAN emulation server
LIS	logical IP subnet
LLNL	Lawrence Livermore National Lab
LOH	line overhead
LRU	local repair unit
MAN	metropolitan-area network
Mb/s	megabits per second
MB/s	megabytes per second
MC	mission-critical
MD	message digest
MDR	minimum data rate
MFTP	multiple FTP
MIB	management information base
MIS	management information systems
MPC	MPOA client
MPS	MPOA server
MPLS	multiprotocol label switching
MPOA	multiprotocol over ATM
MRI	magnetic resonance imaging
ms	milliseconds
MTBF	mean-time-between-failures
MTBCF	mean time between mission-critical failures
MTBSO	mean time between service outage
MTTR	mean time to repair
NA or N/A	not available
NAP	network access point
NAPT	network address port translation
NAS	network access server
NAT	network address translation
NBMA	nonbroadcast multiple access
NFS	network file server
NHRP	Next-Hop Resolution Protocol
NIC	network interface card
NM	network management
NMS	network management system
NOC	network operations center
NOS	network operating system
NR	network requirement
OAM	operations, administration, and maintenance
OAM&P	OAM and provisioning
OCx	optical carrier (x 1, 3, 12, 24, 48, 192)
OLTP	online transaction processing
ORR	operational readiness review
OS	operating system
OSPF	Open Shortest Path First routing protocol
OSI	open systems interconnect
OSS	operations support system
P	peering
PADI	PPPoE active discovery initiation
PADO	PPPoE active discovery offer
PADR	PPPoE active discovery request
PADS	PPPoE active discovery session
PAP	Password Authentication Protocol
PC	personal computer
PDA	personal digital assistant
PDP	policy decision point
PDR	peak data rate; preliminary design review
PEP	policy enforcement point
PING	packet internet groper
PKI	public key infrastructure
PM	program management
POH	path overhead
PoP	point of presence
PoS	packet over SONET; point of sale
POTS	plain-old telephone service
PP	patch panel
PPP	Point-to-Point Protocol
PPPoE	PPP over Ethernet
PPTP	Point-to-Point Tunneling Protocol
QoS	quality of service
R&D	research and development
RA	route aggregation
RADIUS	remote access dial-in user service
RBD	reliability block diagram
RC	rate critical
RED	random early detect
RF	route filter
RFC	request for comments
RFI	request for information
RFP	request for proposal
RFQ	request for quote
RIP	Routing Information Protocol
RMA	reliability, maintainability, and availability
RMON	remote monitoring
RO	read only
RPV	remotely piloted vehicle
RSA	Rivest-Shamir-Adleman
RSVP	Resource Reservation Protocol
RT	real-time
RW	read/write
s	seconds
SA	systems administrator
SAN	storage area network
SAR	segmentation and reassembly
SCM	supply chain management
SCSI	small computer system interface
SDR	sustained data rate
SHA	secure hash algorithm
SIP	Session Initiation Protocol
SLA	service-level agreement
SLAPM	SLA performance metrics
SMDS	switched multimegabit data service
SMON	switch monitoring
SMS	special multicast server, subscriber management system
SNMP	Simple Network Management Protocol
SOH	section overhead
SONET	synchronous optical network
SPE	SONET payload envelope
SSH	secure shell
SSL	secure sockets library
ST	stochastic
SW or S/W	software
TCP	Transmission Control Protocol
T&I	test and integration
TFTP	Trivial File Transfer Protocol
ToS	type of service
UBR	unspecified bit rate
UI	user interface
UID	user ID
UPS	uninterruptible power supply
USM	user-based security model
VBR	variable bit rate
VLAN	virtual LAN
VLSM	variable-length subnet mask
VoIP	voice over IP
VPN	virtual private network
VRML	Virtual Reality Markup Language
WAN	wide area network
WDM	wavelength division multiplexing
WFQ	weighted fair queuing
WG	workgroup
WRED	weighted random early detect
xSP	(various) service provider