Arshad Iqbal Jani (Network Devices)

8/3/2019 Arshad Iqbal Jani (Network Devices)

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ARSHAD JANIARSHAD JANI 1105/02/200905/02/2009

Submitted to:Arashad Iqbal (BCS)

SirAsif IqbalDepartment of Computer Science, Abasyn

University of Peshawar, Pakistan.

Presented by :


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Network DevicesNetwork Devices

RepeaterRepeater

BridgeBridge

RouterRouter

HubHub

SwitchSwitch


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SwitchSwitch

Switch is a small hardware device that joins

multiple computers together within one local

area network (LAN).

They are relatively inexpensive and offer

better performance than a hub.


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When the switch receives a data packet, it

forwards the packet directly to the recipient

device by looking up the MAC (media access

control) address.

Switch communication is Unicost (one to

one communication).

It works on Physical Layer.


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Hub

Hub is also joins multiple computers

together.

Hub communication is broad costing (oneto all communication).

It is not an intelligent device.

Hub doesn't have MAC (Media Access

Control) table addresses.


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All Ethernet hubs accept the RJRJ--4545connectors of standard Ethernet cables.

Some years ago, Ethernet hubs offered only

10 Mbps rated speeds. Newer types of hubsoffer 100 Mbps Ethernet.

Some support both 10 Mbps and 100 Mbps

(soso--calledcalled dualdual--speedspeedoror 10/10010/100 hubshubs).


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Repeater

Repeater is a device which is used in

network for the regenerating of signals.

When a signal travels along a cable, it

tends to lose strength.

It is operates only in the physicallayer.


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A repeater receives a signal and,

before it too weak or corrupted,

regenerates the original bit pattern. The

repeater then sends the refreshed

signal.


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A good example of repeater is

Cell (Cell (MobileMobile) boosters.) boosters.


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Bridge

& Bridge is a network device which can

also regenerate signals.

& It operates in both the physical and

data link layer.


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&As a physical layer device, itregenerates the signals it receives.

&As a data link layer device, the bridge

can check the physical (MAC) addresses(source and destination) contained in the

frame.


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RouterRouter

Router is an intelligent device of network.

It main purpose is to connect different

network with each other.

It can select the best path to route a

message, as well as translate information

from one network to another.


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Routers select the best path to route amessage, based on the destination

address and origin.

It is three layers device that routs

packets based on their logical address

(Host-to-Host) address.


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Suppose we have two LANS, one has

suppose 192.168.0.1 IP class and other

has 10.00.1

Then it is not possible to communicate

these two different networks with each

other.

But due to router, it is possible.


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Thank you for attention!Thank you for attention!

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Arshad Iqbal Jani (Network Devices)