(redirected from TERC)
Also found in: Dictionary, Medical, Financial, Acronyms.
Related to TERC: TNERC, TREC


(computer science)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


The country code for Turkey.
This article is provided by FOLDOC - Free Online Dictionary of Computing (

Token Ring

An earlier local area network (LAN) access method developed by IBM. Conforming to the IEEE 802.5 standard, the Token Ring access method connects up to 255 nodes in a star topology at 4, 16 or 100 Mbps. All stations connect to a central wiring hub called the "Multistation Access Unit" (MAU) using twisted wire cable. Today, most Token Ring business networks have migrated to Ethernet.

Different than Ethernet
The Token Ring MAU may be a central hub, but it does not function like a shared Ethernet hub. Token Ring is more deterministic, which ensures that all users get regular turns at transmitting. With Ethernet, all users compete to get onto the network.

Type 1 and Type 3
Type 1 Token Rings allow up to 255 stations per network and use shielded twisted pair wires with IBM style Type 1 connectors. Type 3 allows up to 72 devices per network and uses unshielded twisted pair (Cat 3, 4 or 5) with RJ-45 connectors. Like Ethernet, Token Ring is a data link protocol and functions at layers 1 and 2 of the OSI model. See token passing, data link protocol and OSI model.

Token Ring Topology
Token Ring uses a logical ring topology, which provides more equal opportunity for each station to gain access to the network than the broadcast method used by Ethernet. All nodes connect to the MAU.

Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
TERC and TERT gene mutations in patients with bone marrow failure and the significance of telomere length measurements.
As we noted, some participants unfamiliar with the text features used in Everyday Mathematics (UCSMP, 2012) or Investigations (TERC, 2012).
Analyses for mutations in genes known to be associated with DC included sequencing of DKC1 [7] (dyskeratosis congenita 1, dyskerin), TINF2 [TERF1 (TRF1)-interacting nuclear factor 2] exon 6, and TERC (telomerase RNA component).
(Adapted from Investigations in Number, Data and Space (TERC, 2007), Section 3.4, Unit 9) Teachers exploring tasks
For over 20 years, Judy Storeygard has been a senior researcher at TERC, a not-for-profit organization specializing in research, development, and professional development for STEM (Science Technology, Engineering, and Math) education programs.
M2 EQUITYBITES-August 31, 2012-Quest Diagnostics unveils molecular cervical cancer test based on National Institutes of Healtha[euro](tm)s TERC Gene Marker(C)2012 M2 COMMUNICATIONS
The CP524 is also equipped with reliability features such as hitless switching with diversity reception, service fallback and T-VIPS Embedded Redundancy Control (TERC) to ensure 100% uptime even in the case of severe packet or link loss.
Storeygard, (a research associate at TERC, a non-profit research and development organization whose mission is to improve mathematics and science education), joined by ten contributing teachers, present a text for kindergarten through fifth grade teachers, intended as a guide to differentiate mathematics instruction based on the needs of each child.
1984, Mouthon 2001b, Mouthon & Parghentanian 2004), chlorophyll a concentrations in Lake Tahoe range from 0.5-1.5 [micro]g/L (TERC 2010).