Long description

There are four machines placed from left to right connected to a common network. The four machines are labeled Machine 1 to Machine 4. All four machines have two horizontal partitions and the lower partition is labeled kernel. The top partitions of Machine 1, 2, 3, and 4 are labeled Client, File server, Process server, and Terminal Server, respectively. A backward arrow labeled message from a client to server from machine 1 Client points to machine 2 file server. There are dots marked on both sides between four machines that depict that several machines follow the same pattern.