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Whats the Diff Between a Switch & Hub



Can someone here explain me this.. I mean --- my buddy brings over his hub and comp to my place all the time... So I went out and bought a Switch thinking it was a hub..

there I was all worried I wouldint be able to get online with himand such but I am...

so whats the diff between the two?


Inside the hub, all ports are connected to others. The network via hub connects all stations together, sharing the same path with much possibility of collision. It means that when 5 PCs connected to a 100Mbps hub, these 5 PC will share the 100Mbps and each PC could obtain 20Mbps bandwidth. Also, when one port in a hub receives a data frame, it will copy this frame to all ports in that hub. The features will cause serious collision when the traffic increases.

Inside the switch, the ports are connected to each other only when addressed. The network via switch connects stations only when they access each other. Each port on a 100Mbps switch has dedicated 100Mbps bandwidth. A switch will learn the attached PC's MAC address. When receiving a data frame, it will check MAC table. If the switch finds the MAC address in the table, it will transfer the data directly to that port instead of copy to all ports. That's why there is seldom collision in a switch.


Sweet! Thanks :)

So it looks like I made myself a good job of 'making a mistake' by purchasng a switch over a hub !!
Welcome to NTFS.org MikieLikesIt!

Originally posted by PseudoKiller
[...] each PC could obtain 20Mbps bandwidth.
This isn't really true. Each computer can obtain 100Mbit, just not at the same time. Only if all 5 computers would use the network as much as they could, they would get about 20Mbps each (minus collisions).

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