This term is slightly confusing because, in different contexts, in means slightly different things. In general, when talking about networksA collection of items like computers, printers, phones, and other electronic items that are connected together by switches and routers. A network allows the connected devices to talk to each other electronically. The internet is an example of an extremely large network. Your home network, if you have one, is an example of a small local network., it refers to that part of the network where devices (computers, printers, etc.) are connected. That’s in contrast to the coreThis can have more than one meaning. When discussing networks, the core is the heart of the network where much of the traffic (or at least that part that has to go a long ways to its destination) moves. This is in contrast to the edge -- the outer part of the network where devices like computers and printers get connected. When discussing computers, you can think of it as the same as a CPU., which is the middle of the network where lots of trafficRefers to any kind of electronic message -- email, web request, streaming video, or anything else -- that travels over a network. gets moved around.