network question

[titanmiller]

If I have a network setup like this, and computers 1-5 are talking to each other (never to 6-10) and utilizing 100% of the avialable bandwidth, how much bandwidth will computers 6-10 have?
If the hubs are switched out for switches (pun...haha) and computers 1-5 are once again utilizing 100% of the bandwidth (again never talking to 6-10) will computers 6-10 be able to communicate to each other (never to 1-5) at 100% of the capacity on their side of the switch? In other words if all of the components are 100mbit/sec will the total throughput be 200mbit/sec?
Sorry if it is hard to understand by how I said it.

 

[Genx87]

If you use hubs you just created a 10 node collision domain. That means in an ethernet network when one computer broadcasts a frame for a certain mac addy every computer will recive that frame. You wont get 100% bandwidth. In fact with hubs I think the best you will do is half duplex.

If you replace those hubs with switches then you can have 1-5 and 6-10 in thoery never talk to each other if you never have a frame broadcasted to the other switch. Then they wouldnt even know they were there. As for bandwidth? Switches always provide full duplex within the collision domain(that being the wire between the switch and the computer) As for 100% once you leave the collision domain and are switched to the appropriate port? I believe that is also 100% full duplex.

I hope this helps to answer your question a bit.

 

[titanmiller]

Thanks, So assuming switches are being used and there is no overhead ect.. I could be transfering a file from 1 to 5 at 100mbit/sec and at the exact same time be transfering a file from 6 to 10 at 100mbit/sec with out affecting the transfer rate of the computers attached to the other switch.
Thats what I thought just checking.

 

[Smilin]

yep, further more you could also transfer a file from 5 to 1 at 100mbit (full duplex remember). Full duplex and hubs are bad tho...other devices on the same hub just see a broadcast storm and everything goes to sh1t.

 

[gunrunnerjohn]

Switches are dirt cheap now, and there's really almost no reason to use a hub anymore.