Lesson 1 Terms

Networking - Connecting of any collection of computers, printers, routers, switches, and other devices for the purpose of communication over some transmission medium.

Peripheral - Device connected to a computer to provide auxiliary functions such as printing, added disk space, scanning or CD-ROM.

Protocol - Formal description of a set of rules and conventions that govern how devices on a network exchange information.

Local-area network (LAN):
High-speed, low-error data network covering a relatively small geographic area. LAN's connect workstations, peripherals, terminals, and other devices in a single building or other geographically limited area. LAN standards specify cabling and signaling at the physical and data link layers of the OSI model. Ethernet, FDDI, and Token Ring are widely used LAN technologies.

What is Networking?
Networking is the interconnection of workstations, peripherals, terminals and other devices. One of the most common types of networks is the Local Area Network or LAN.

In networking, it is possible for different types of computers to communicate. It is not important what type of computer is used on a network. It may be a Macintosh computer or a PC or a mainframe. In networking, what is important is that all the devices speak the same language, or protocol.

Why and how did networking start?
Applications written for business helped create the PC industry and early computers were standalone devices. In other words, each computer operated on its own, independent from other computers. It soon became apparent that this was not an efficient or cost effective way for businesses to operate. A solution was needed that would successfully address three problems; duplication of equipment and resources, inability to communicate efficiently, and the lack of network management.

One early solution to these problems was the creation of local area networks, or LANs

Because they connected workstations, peripherals, terminals, and other devices in a single building, LANs made it possible for businesses using computer technology to efficiently share such things as files and printers.

As the use of computers by businesses grew, however, it soon became apparent that even LANs were not sufficient. In a LAN system, each department or business was an electronic island.

What was needed was a way to move information efficiently and quickly from one business to another. The solution was the creation of metropolitan area networks, or MANs, and wide area networks, or WANs. Because WANs connected networks that served users across a large geographic area, they made it possible for businesses to communicate with each other even though they were geographically distant from each other.

Why are networking standards needed?
Early development of LANs, MANs, and WANs was chaotic in many ways. The early 1980s saw tremendous expansion in networking. As companies realized how much money could be saved and how much they could gain in production by using network technology, they began adding networks and expanding existing networks almost as rapidly as new network technologies and products were introduced. By the mid-1980s, growing pains from this expansion were being felt.

Because many of the emerging network technologies were built using different hardware and software implementations, one problem that soon surfaced was that many of the new network technologies were incompatible. Increasingly, it became difficult for networks using different specifications to communicate with each other.