Switch

A switch is one of the important devices of a production network. Many of you who are familiar with switch, how it works all that stuff, who are not familiar with a switch I will try to write about the switch.

In technical language, a switch is a layer 2 device. It works on the data-link layer of the OSI model. Switch forwarded traffic base on the MAC address. In the above diagram, I use 48 ports switch, which means 48 host devices are connected with that switch. The switch can have various types of ports as per our requirement, we use.

 Classification:

Base on the operation switch is classified into two types.

  • Layer 2 switch [forwarding base on the MAC address]
  • Layer 3 switch [forwarding base on the IP address] 

Features:

  • Many hosts machine are connected to the network with the help of the switch. A switch is used to form a local area network. In one sentence one subnetwork maintains by a switch.
  • The switch works in full-duplex mode.
  • The switch has a separate collision domain and one broadcast domain.
  • The switch maintains a table called the MAC table.

Disadvantages:

  • The switch communication base on broadcast, a broadcast is a very inefficient communication, which adds latency to a production network.
  • [note: VLAN(virtual local area network) concept come into the picture to solve the above problem]


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