Vicidial network setup question. Easy question. please help!

Hi everyone i am very new to vicidial, i am planning to install vicidialnow on to a Intel core 2 server comp which i built myself. i also have 5 other p4 comps which will be for my outbound agents.
My question is in regards to the setup and routing of the network. I installed a second lan card into the server comp because someone told me i need that. if someone could just tell me how to route the network cables??? starting at the inet modem to the server and all the comps. also what kind of hardware i will need? such as router or switch or something?
we r starting with 5 seats but will be expanding from there to 40 or more.
My question is in regards to the setup and routing of the network. I installed a second lan card into the server comp because someone told me i need that. if someone could just tell me how to route the network cables??? starting at the inet modem to the server and all the comps. also what kind of hardware i will need? such as router or switch or something?
we r starting with 5 seats but will be expanding from there to 40 or more.