Automatic Cartridge System, the name of the circular StorageTek robot tape devices in the Mesa Lab computer room.
ACT
Active module. One of several secondary card
states that may be reported by a "show equipment" command in an ADVA
RayExpress optical switch. On a switch with 2 SP modules, "ACT"
indicates that the module is the active module.
ACU
Aironet Client Utility
ACUTA
Association of College and University Telecommunications Administrators
AD
Active Directory
ADAG
Active Directory Advisory Group
Adams State
ADams State College, was a secondary FRGP member behind UCDHSC until May 2007, when they elected not to join the new UPoP.
address mask
A bit mask used to select bits from an Internet address for subnet addressing. The mask is 32 bits long and selects the network portion of the Internet address and one or more bits of the local portion. Sometimes called subnet mask.
address resolution
A means for mapping Network Layer addresses (like an IP address of 128.125.1.45) onto media-specific addresses (like an Ethernet address of 8:0:20:9:42:c0). See ARP.
address
A number or name that uniquely identifies a computer in a network. Usually, an address uniquely identifies a specific interface on a computer (some computers have multiple connections to networks). To make addresses easy for humans to use, names are usually assigned to addresses, and network software converts the names to numbers.
In the client-server model, the part of the system that performs information preparation and exchange on behalf of a client or server application. See NMS.
AGS+
A gateway/router/bridge manufactured by Cisco Systems. It can have various interfaces, including AUI ports, FDDI ports and serial ports (T1 and/or T3 (HSSI)).
Active Internet End-to-end Performance Measurement
AIP
ATM Interface Processor
AIS
Alarm Indication Signal
Alantec
A company that makes hubs that were once used by NCAR.
AMI
Alternative Mark Inversion
AMP
Active Measurement Program
ANAP
Aggregated Network Access Point
ANI
Automatic Number Identification; Asynchronous Network Interface
ANIR
Advanced Networking Infrastructure and Research (NSF/NLANR)
Annex
A terminal server manufactured by Xylogics, which was bought by Bay networks. We used to use Annex terminal servers
ANSI
American National Standards Institute. The U.S. standardization body. ANSI is a member of the International Organization for Standardization (ISO)
ANSI
American National Standards Institute
AO/DI
Always On / Dynamic ISDN
AP
Access Point - a network device that provides wireless access.
AP
Accounts Payable
APC
American Power Conversion (Corporation)
API
Application Program Interface. A set of calling conventions defining how a service is invoked through a software package.
API
Application Programming Interface
APIPA
Automatic Private IP Addressing
APS
American Physical Society
APS
Automatic Protection Switching (SONET)
AR
Accounts Receivable
ARA
AppleTalk Remote Access, a protocol developed by Apple to allow PowerBook and Macintosh users to connect to an AppleTalk network over phone lines.
ARAP
AppleTalk Remote Access Protocol
ARENA
Advanced Research and Education Network Atlas
ARIM
Atmospheric Radiation Investigations and Measurements
ARIN
American Registry for Internet Numbers
ARM
Advanced Resource Management (Cisco)
ARP
Address Resolution Protocol. The Internet protocol used to dynamically map Internet addresses to physical (hardware) addresses on local area networks. Limited to networks that support hardware broadcast.
ARP
Address Resolution Protocol
ARPA
Advanced Research Projects Agency. Now called DARPA, the U.S. government agency that funded the ARPANET.
ARPANET
A packet switched network developed in the early 1970s. The "grandfather" of today's Internet. ARPANET was decommissioned in June 1990.
AS
See Autonomous System.
ASC
Aeronautical Systems Center
ASC
Applications Strategy Council (Internet2)
ASCI
Accelerated Strategic Computing Initiative
ASCII
American Standard Code for Information Interchange. An eight-bit code for character representation (like, "A" is 65, "B" is 66, etc.)
Attachment Unit Interface. An Ethernet transceiver cable, or the connector to which such a cable might attach.
AUP
Acceptable Use Policy
Autonomous System
Internet (TCP/IP) terminology for a collection of gateways (routers) that fall under one administrative entity and cooperate using a common Interior Gateway Protocol (IGP). Each autonomous system has a unique number. The autonomous system number NCAR uses is 194.
AVA
Attribute Value Assertion (HPOV NNM)
AVVID
Architecture for Voice, Video and Integrated Data (Cisco)
