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Text B: Network classifications

In the past, a great diversity of network technologies existed as engineers pioneered various ideas to make data transport faster, more efficient, and more secure. Today, networks are becoming more standardized.

To understand network classifications and make sense of the network options available for your computer, think of a network as composed of several layers of technology. The most important network technology layers are geographical scope, organizational structure, physical topology, network links, bandwidth and communications protocols.

From a geographic perspective networks can be classified as PANs, NANs, LANs, MANs and WANs.

A PAN(personal area network) is a term sometimes used to refer to the interconnection of personal digital devices within a range of about 30 feet (10 meters) and without the use of wires of cables.

A NAN(neighbourhood area network ) provides connectivity within a limited geographical area, usually spreads over several buildings.

A LAN(local area network) is a data communications network that typically connects personal computers within a very limited geographical area – usually a single building.

A MAN(metropolitan area network) is a public high-speed network capable of voice and data transmission within a range of about 50 miles(80km).

A WAN(wide area network) covers a large geographical area and usually consist of several smaller networks, which might use different computer platforms and network technologies.

The Internet is the world’s largest WAN.

Mark the following statements as True or False.

1. There are different kinds of networks.

2. From a geographic perspective networks can be classified only as PANs.

3. A WAN consists of one huge network.

4. LANs use a variety of wired and wireless technologies, standards and protocols.

5. Geographical scope is an area in which network devices are located.

Put the letters in the following words into the correct order.

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