If u had a two level house and 4 computers (2 downstairs and 2 upstairs) what equimnet would u use to ge the best connectivty, security, and speed.
Wired will give you the best of all three but is not always possible in a two story home (actually it is but might be extremely difficult). Before you buy any networking hardware at all, carefully study how the house is built and determine exactly how you would get CAT-5 from one floor to the other and from room to room. You may have to run 200 feet of cable to go 10 feet... which is ok since you're allowed 328 feet from each computer to the router. You might need a fish tape to run down walls (which usually have firebreaks inside). If you decide it isn't worth the cost or the hassle then all or partial wireless would be your best option.
I have a single story house with four wired PCs and getting all of the CAT-5 inside the walls was not easy.