Answer / bhisham

Hub:-Layer 1,brodcasting,it perform the inbuilt fuction of
reapeater.port 4-16

Switch:-layer 2,Unicasting,multicolision domain,H/w based
ASIC

Router:-layer 3,used to connect two different network

Answer / venkatesh

HUB - is a non intelligent device. it just broadcat data
what data will come. it doesnt know what is source host
what is the destination. it is just like multiport repeter.
and it is layer1 device.

Switch - it is a intelligent device. it cant do broadcast.
it can done flooding. also done multicats and unicats. it
is work with mac address. so it is a layer 2 device.

Router - it is mainly used to connet two diff networks. it
is work with ip address. it is a layer 3 device.

Answer / darshan wagh

Hubs work at the Physical layer. A hub is a totally dumb
device. If it gets a data signal, it just forwards thesignal
to all devices. It cannot do any kind of filtering or
addressing. Performance is not so good because ahub can't
establish a direct connection from one computer to another.

If a switch gets a data packet, it will try and find the
destination device, and then send it to that device
only,i.e. it establishes a point-to-point connection between
the sending and receiving devices. But the devicesmust be on
the same subnet. A switch won’t send data packet to
computers on different subnets. A switchbreaks up collision
domains but it does not break up broadcast domains unless we
use VLANs.

Routers work at the Network layer and operate on the IP
Address. Router only gets a data packet if the
destination computer isn’t on the same subnet or LAN. The
router then finds the location of the destination
device and then sends it in the right direction. A router
breaks up broadcast domains.

Answer / 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.

Answer / nikunj pujara

SWITCH: It is used to connect all devices on a network so that they can communicate with each other. but first time it will do broadcast and from second time onwards it will do unicast.

HUB: it is generally used to connect all devices on a network so that they can communicate with each other. it always do broadcasting.

ROUTER:router is device which allows communication between two or more different networks present in different geographical locations.

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