A network segment is a portion of the computer network where in every device it communicates using the same physical layer. Devices that extend the physical layer, such as repeaters or network hubs, are also considered to extend these segments. However, devices that operate at the data link layer level or higher create new physical layers and thus create rather than extend segments.Ethernet
In the context of Ethernet networking, the network segment is also as the collision domain. This comprises the group of devices that are being connected to the same bus, and that can make CSMA/CD collisions with each other, and sniff their packets in promiscuous mode. It also includes devices connected to the same hub, which also can have collisions with each other.
Other uses of the term 'network segment'
- The term network segment is also sometimes used to refer to the portion of a computer network in which computers can access each other using a data link layer protocol. In this case, it is synonymous with broadcast domain.
- Occasionally, the term refers to a subnetwork.
- It is also applied to a language space within the Internet, such as Runet or Kaznet.
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