arshad iqbal jani (network devices)
TRANSCRIPT
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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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ARSHAD JANIARSHAD JANI 2205/02/200905/02/2009
Network DevicesNetwork Devices
RepeaterRepeater
BridgeBridge
RouterRouter
HubHub
SwitchSwitch
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ARSHAD JANIARSHAD JANI 3305/02/200905/02/2009
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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ARSHAD JANIARSHAD JANI 111105/02/200905/02/2009
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!