Switch + Hub = Slow LAN?

Hello.

I have a network of 20 computers, plus one server.

20 computers divided into 2 tables therefore resulting in 10 PCs on each table.

One table has a 16 port 10/100MB switch to which 10 PCs are connected, and the second table has another 10 PCs, but they are connected to a 16 port 10/100MB HUB(not a switch).

Hence switch and hub are connected together, and the switch also is connected to the server(since its closer to the server).

Will having switch and hub working together result in increased latency?
Would it be much better if I replaced the hub with identical switch?
Is it better if I connect two switches through Uplink port? Will it increase LAN's performance? What cable is used(straight-through or crossover)?

Thanks.

16 port 10/100MB HUB

Replace it with a switch. The hub, by the way it works, is killing you.

to wit:
Hubs do not manage any of the traffic that comes through them, and any packet entering any port is broadcast out on every other port. Since every packet is being sent out through every other port, packet collisions result--which greatly impedes the smooth flow of traffic.

If you're going to get a new switch anyway, why not get a 24 or 48 port switch?

Train
-Ok, thanks man.

Midknyte
-I was thinking of it, but then I'll have to find a new spot for it and get rid of the 16 port(If that is what you meant). Hence, I have short cables, so it would be immpossible for all PCs to reach the switch. But still I will think about your suggestion, and redesign the topology to fit the service of one, central 24/48 switch.
-My budget is tight =)

Any suggestions concerning the "uplink" question?

I just plug them into the router in seperate ports. If the router is fast enough.

Other wise one switch is plugged into the router and the other switch is plugged into the first switch.

10/100 router and gigabit switches. It works.

Anytime you put an uplink, you are bottlenecking the network. It won't be so bad with a switch instead of a hub.

Most switches are autosensing nowadays, especially the larger ones.

Okay.
Thanks guys.