I have the 2 family computers, 1 work computer, and my xbox hooked up to my router so my router has no more ports for anything else. I am currently building a new computer for myself but will have no way to hook it up for internet connection. So my question is would I be able to use this http://www.newegg.com/Product/Product.aspx?Item=N82E16833122363&cm_sp=Specials-_-33-122-363-_-12012012_1 for my computer? Also would the connection be slower if I have a switch connected to my computer? And if somebody could, can you give me a brief explanation on what a switch actually does?