Ports Serial and parallel ports, standard on most computers, are the outlets for the external modem, printer, and occasionally peripherals such as digital cameras and MIDI interfaces. Multiple parallel ports would be used if you have more than one printer attached to your computer. Choosing What You Need Pick the type that best suits the space available. Make sure the machine will have ample expansion slots and at least one free drive bay. The physical network wiring is like the nervous system the connections between the parts.
Messages travel from the brain to the organs and limbs to enable the body to work.
A computer network is actually simpler than the body in that the parts of the network can all have equal functions, and can also be as intelligent as the server, the body parts have different functions which work together as a total system. The server is the central repository with more filing space and processing power serving all the computers attached to it. The server controls the speeds and queues on the network, just like the brain controls the body. Users liked their independence, and over a few short years, these independent computers became more powerful, with increasingly more information stored in them. But workers realized they often needed to share information with colleagues, and corporate staff began to realize that they were losing control of the corporate assets, or information.