do u mean physically link them with cable? cos thats definitely not in the ipt textbook and don't know y u'd wanna know anyway. if u just mean topologies then look them up in the text book...they're star (relies on central comp), bus (easy to create,connected in a line, still works if one node fails) and rind (in a circle, if one fails, the whole network fails. slow) ur textbook will have more details. wow i didnt know i still had all this ipt knowledge stored in me. how annoying.