what is swith,hub and router?

Answer Posted / amandeep singh

All the mentioned are the networking devices for connecting
different computers, other peripheral devices (printers,
scanners), different network with each other.

SWITCH:

Switch is a device to connect different computers with each
other in the same network. One advantage of switch over hub
is it do not multicast the data/message. It is due to MAC
Table maintained by Switch. Works on Layer 2 of OSI Model.

HUB:

Hub is also a network device but comparing to Switch its
data transfer speed is slow because it multicast the data
in the network and after getting the destination host it
deliver the data. Works on Layer 1 of OSI Model.

ROUTER:

Mainly used to connect different networks which have
different IP address range. From its name its clear that it
route one network to other network to make communication.
One good advantage of router is that is also works as
firewall in your network.

A router may create or maintain a table of the available
routes (networks) and their conditions and use this
information along with distance and cost algorithms to
determine the best route for a given packet, so data
transfer is fast. Works on Layer 3 of OSI Model.

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