Data Communication/Networks

Today, data communications and networking are the fastest growing technologies in the world. Professions that make use of technologies are increasing rapidly. A network can be described as a collection of entities wanting to share and have a conversation or the exchange of messages,information or data through physical sources. It can also be defined as resources or facilities that make the conversation possible. Internet is the largest wide area network in the world. It is not a single network, but a collection of thousands of computer networks throughout the world. These are either LAN (Local Area Network), covering an office block or University campus, or  a WAN (Wide Area Network) connecting computers over a wide geographical area,
even over several countries.