Network segment

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A network segment is a portion of a computer network. The nature and extent of a segment depends on the nature of the network and the device or devices used to interconnect end stations.[1]


According to the defining IEEE standards for Ethernet, a network segment is an electrical connection between networked devices.[2]

In the original 10BASE5 and 10BASE2 Ethernet varieties, a segment would therefore correspond to a single coax cable and any devices tapped into it. At this point in the evolution of Ethernet, multiple network segments could be connected with repeaters (in accordance with the 5-4-3 rule) to form a larger collision domain.

By the IEEE definition, on modern twisted-pair Ethernet, a network segment would correspond to the individual connection between end station to network equipment (i.e. repeater, hub or switch) or the connections between different pieces of network equipment.

Although the above definition would indicate that, through the use of repeaters or hubs, it is possible to have multiple network segments within a collision domain, the term is sometimes used as a synonym for collision domain.[3][4]

Token ring[edit]

All end stations connected to the same Media Access Unit for token ring are part of the same network segment.[citation needed]

Token bus[edit]

All end stations connected to the same token bus are part of the same network segment.[citation needed]

Other uses[edit]


  1. ^ "Network Segment Definition". 2 October 2005. Retrieved 2010-09-03. 
  2. ^ "1.4.318", 802.3-2008 Part 3: Carrier sense multiple access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, IEEE, 26 December 2008, segment: The medium connection, including connectors, between Medium Dependent Interfaces (MDIs) in a CSMA/CD local area network. 
  3. ^ "Segment (Network)". Retrieved 2010-09-03. 
  4. ^ "Segment". Retrieved 2010-09-03. 
  5. ^ "What is a Network Segment?". Retrieved 2010-09-03.