A network switch is a computer networking device that connects network segments.
The term commonly refers to a Network bridge that processes and routes data at the Data link layer (layer 2) of the OSI model. Switches that additionally process data at the Network layer (layer 3 and above) are often referred to as Layer 3 switches or Multilayer switches.
The term network switch does not generally encompass unintelligent or passive network devices such as hubs and repeaters.
The first Ethernet switch was introduced by Kalpana in 1990. [1]
Contents[hide]
1 Function
2 Role of switches in networks
3 Layer-specific functionality
3.1 Layer-1 hubs versus higher-layer switches
3.2 Layer 2
3.3 Layer 3
3.4 Layer 4
3.5 Layer 7
4 Types of switches
4.1 Form factor
4.2 Configuration options
4.2.1 Traffic monitoring on a switched network
4.2.2 Typical switch management features
5 See also
6 References
7 External links
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