• Serves as a central device that bridges up all the Host on a Local Area Network (LAN), forwards data packets among the hosts with the use of MAC Address
  • Network switch can only read the MAC Address information from the data it receives, the other information is just a stream of meaningless zeros & ones to the network switch
  • The network switch maintains a MAC Address Table, so it knows which switch port it should forward the data to, avoids forwarding the data to all the switch ports


With the help of network switch, each host just needs to have one single connection to the network switch to communicate with other hosts connected to the network switch.

We just need to use one wire to add in a new host and it is able to communicate all other hosts without the need to make any modifications to other hosts.