ARCnet


Also found in: Dictionary, Acronyms, Wikipedia.
Related to ARCnet: ethernet, Fddi

ARCnet

(networking)
A network developed by DataPoint. ARCnet was proprietary until the late 1980s and had about as large a marketshare as Ethernet among small businesses. It was almost as fast and was considerably cheaper at the time.

ARCNET

(Attached Resource Computer NETwork) The first local area network (LAN) introduced in 1968 by Datapoint Corporation. It connected up to 255 nodes in a star topology at 2.5 Mbits/sec over twisted pair or coax. A 20 Mbits/sec version was introduced in 1989. Although not as popular as Ethernet and Token Ring, many ARCNET networks were sold due to their lower-cost adapters. Gateways could connect ARCNET to mini and mainframe networks.

ARCNET is a data link protocol and functioned at the data link and physical levels of the OSI model (1 and 2). It used the token passing access method. See data link protocol and OSI.
References in periodicals archive ?
This section evaluates the performance of BACnet services over ARCNET networks.
Message length of request and reply frames is 25 bytes and 30 bytes, respectively, including frame overhead of the ARCNET protocol.
The performance improvement for ARCNET is much more significant than it was for MS/TP networks (compare Figures 9 and 10 with Figures 5 and 6).
A comparison of Figures 11 and 12 shows a significant difference in performance between ConfirmedCOVNotification and UnconfirmedCOVNotification in ARCNET networks.
In real applications, traffic generation patterns in Ethernet can be different from that in MS/TP or ARCNET.
Comparison with the results in Figure 9 shows that ARCNET networks saturate at a lower value of G than Ethernet networks when the number of nodes increases.
Comparison with the results from ARCNET in Figure 10 shows that the average service delay for Ethernet networks is smaller at light traffic loads, but that Ethernet is saturated at a lower value of G.
Similar to the MS/TP and ARCNET networks, all the nodes in the medium transmit COV notification messages to a central controller node when a COV occurs.
Comparison with the results from ARCNET in Figure 12 shows, once again, that the network resource for ConfirmedCOVNotification service in Ethernet is saturated at higher values of G when the number of nodes increases.
This study examined the delay characteristics of three popular BACnet LANs: MS/TP, ARCNET, and Ethernet.
Sponsors include the ARCNET Trade Association, Contemporary Controls (Downers Grove, Ill.