What is a Switch?
A switch is used in a wired network to connect Ethernet cables from a number of devices
together. The switch allows each device to talk to the others. Switches aren't
used in networks with only wireless connections, since network devices such as
routers and adapters communicate directly with one another, with nothing in
between.
Although you can use the ports on the back of a router or modem
to connect a few Ethernet devices together, depending on the model, switches
have a number of advantages:
v Switches allow dozens of devices to connect.
v Switches keep traffic between two devices from getting in the
way of your other devices using the same network.
v Switches allow control of who has access to various parts of the
network.
v Switches allow you to monitor usage.
v Switches allow communication (within your network) that's even
faster than the Internet.
v High-end switches have pluggable modules to tailor them to
network needs.
Switch- A network
switch is a small hardware
device that joins multiple computers together within one local area network (LAN). Technically, network switches operate at
layer two (Data Link Layer) of the OSI model.
HUB - A hub is a small, simple, inexpensive device
that joins multiple computers together.
ROUTER A router is used to interconnect multiple
networks.
DIFFERENT BETWEEN SWITCH & HUB
Switch |
Hub |
|
Ø In
switch Each Port having own collision Domain. Avoid collision.
Ø Switch is a layer-2
device, in this data transmission in the form of
frames.
Ø Switch operates on data
link layer.
Ø Switch one time
broadcast after that unicast the signals.
Ø Its speed is 10-100
mbps.
Ø switch based on
star topology
|
Ø Hubs
have limited ports compare to switch.
Ø Its
speed is slow because more collision.
Ø Hub is a layer-1
device, in this data transmission in the form of
bits.
Ø HUB operates on
physical layer.
Ø Hub broadcasts the
signals.
Ø Its speed is 10
mbps.
Ø Hub internally
based bus topology.
|
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