Yes you acn use a hub to connect your computers. Just connect a cat5 network cable from each of your computers to the hub. It doesn't matter which port you plug the cat5 cable into on the hub. they are all the same.
Also, if you might be interested in making your own cat5 cables. I have added a link on how to do ths.
A hub or switch must be used to connect 3 PCs together. Two PCs can be connected using a single crossover cable.
I have a PC, laptop and xbox running and i have a modem and router downstairs with a wire leading upstairs then a netgear high speed hub splitting my connection 3 ways to my PC etc , but i don't think u need a hub if your router has multiple ethernet slots.
forget that and use a HUB/Switch or wireless router
A Crossover Cable is used to connect 2 PCs (when a hub or switch is not used) to make the simplest network of all. (6th Edition, Page 852)
A switch or hub is used to connect multiple devices to a modem. Hubs have largely fallen out of use due to their bandwidth-sharing properties that make them undesirable in high-speed local networks.
Crossover
The "Crossover" port. (or MDI-X)
You would need to use a PC to connect to the internet with the modem. Then use a network card to connect to a hub. Use the hub to connect to your Playstation. Then setup the PC as a proxy server.
As long as the Mac in question has a wireless adapter, it should connect.
Yes and no. If you want to just directly connect the two pc's together a cross-over Ethernet cable can do this. Cross-over cables are used to connect 2 like devices. Doing this will most likely require you to disconnect from the internet, unless your computer has 2 NIC's (ethernet ports) If you want to connect both computers together AND still have internet access a hub, or switch, or router is needed. Thus creating your own LAN
If you have an ADSL modem, you connect the ADSL modem to the hub, and you connect cables from the hub to each computer. If you have only a single computer, you need no hub.If instead you want to use a WiFi (wireless) connection, you also need an access point for the wireless connection.
Either use a crossover cable or connect them using a hub, switch, or router.