-A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. -Each of the devices on the network can be thought of as a node; each node has a unique address. -Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Example: -Some networks also provide names that humans can more easily remember than numbers. Example: , corresponding to the above numeric address. Internet address Consists of 4 bytes separated by periods Example: -The R first bytes.
