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Old 07-28-2005
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Question difference between repeater,hub,switch,etc


i want to get clear information about the differeces between repeater, hub,switch,bridge,router, gateway...

and i also want to know abt at what situation they are implemeted.(used)..

hlp pls
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Old 07-28-2005
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Default Re: difference between repeater,hub,switch,etc


Here is a link that explains the differences.

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Old 08-31-2010
chrisadam chrisadam is offline
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Default Re: difference between repeater,hub,switch,etc

A repeater is specific hardware designed to overcome signal attenuation, it usually has only two ports and is designed to pure boost or amplify a signal.

A hub is very similar to a repeater. It allows for multiple machines to connect to the same network, by broadcasting traffic to all of its ports. ie traffic from a machine on port 1 going to a machine on port 3 will also be sent to any device connected to ports 2, 4, and 5. The most practical implication of this is that only one device can send data at a time, otherwise a collision occurs. Hubs implement a collision detection multiple access method to detect when two machines attempt to send data at the same time.

So far, both a repeater and a hub work at the physical layer of the network. A switch classically works at layer 2 or the data-link layer of a network (although multi-layer switches exist).

A switch works by keeping track of which MAC addresses are attached to each port. It inspects traffic and only sends it to the port that the destination device is on (based on the destination MAC address). A switch had a finite amount of memory in which it can store MAC addresses, smaller switches such as ones intended for desktop use have less memory then larger ones that may form part of an enterprise networks backbone. When a switches memory becomes full of active MAC addresses it will often revert to functioning like a hub and broadcast traffic to all ports.

So in summary, a repeater boosts signal, a hub connects multiple network devices by broadcasting all traffic down all ports, and a switch connects multiple network devices by intelligently sending traffic to the ports that require it.
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Last edited by Jerry K : 08-31-2010 at 11:50 AM.
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Old 03-09-2012
jeffreyrogers jeffreyrogers is offline
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Default Re: difference between repeater,hub,switch,etc

as far as i understand the difference between Repeater,hub,bridge, switch,router & gateway are as follows , how correct is my understanding ?


Forwards every frame it receives
it is a generator,not an amplifier(i.e it removes noise & regenerates signal )
Bi-directional in nature
Useful in increasing ethernet size/length
Maximum of 5 Repeaters in an Ethernet


basically a multiport repeater
can be used to divide a single LAN into multiple levels of Hierarchy


connect similar/dissimilar LANS
Designed to store and forward frame
Protocol independent
Transparent to End Stations
Operates in Layer-1 & Layer-2
uses a table for filtering/routing
does not change the Mac address in the frame
two types of bridges are there Transparent/source routing


A fast Bridge.
Common forwarding approaches used include Cut through,collission free & Fully buffered


Links dissimilar n/ws
not transparent to end stations
acts on a network layer frame
isolates LAN to subnets to manage & control traffic


uses Layer -7 Relay
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