No. A hub is the prostitute of a network. Basically it just allows traffic to travel from computer to computer without any questions. If you have 20 machines connecting through a 10mbps hub, the signals are transported simultaniously to the server. This slow down the connection as it consumes the bandwidth and also allows for collision of packets. The data cannot be directed in any way via the hub - it simply connects a-b and back again. The data is insecure and packets can be intercepted at any point within the network.

Switches are more intelligent, allowing the transfer of data from one specific computer to another. Although similar in operation to a hub, the added control allows more security as the packets are not just wandering everywhere, no packet collission and less degredation of bandwidth. They connect computers together via IP addresses or Mac addresses - this is done by the ARP and rARP protcols.

Switches and routers also allow the assignment of internal IP addresses (NAT or NO-NAT) though the connection of one network to another (internetworking) is the job of a router.

So:

Hub: shares traffc on a network: no security, no assignment of addresses, collission a possibility, bandwidth nightmare - basically a carrier

Switch: Shares traffic intelligently on a network. Connects computers together via IP addresses or Mac addresses. Can assigns IP addresses internally. Is more secure. Stops collissions, bandwidth friendly - bascally a team of loyal carriers

Router: Shares trafffic intelligently accross networks. Usually connects to a switch or hub. IP config, port forwarding, fireall etc etc. - the team who dispach the team of carriers

I hope that made sense to you - my hangover prevents my brain from flowing very well today