JKSSB Accounts Assistant Syllabus 2020: Check Exam Pattern & Syllabus|Internet and it's types| Computer Accounts assistant| and Class IV|

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INTERNET 
The Internet is just a series of computers, linked to at least one another round the world, communicating almost instantaneously with each other . It comprises tens and thousands of computer networks (a single network may contains all the computers of an office linked to every other. A larger network may be connecting all the computers within a university premises) communicating with each other like a big net or web! It can be termed as a 'network of networks'. These computer networks are physically linked with each other through telephone. radio, cable lines, satellite, or even fiber optic. The Internet has literally put a world of data at ones fingertips. Computer Networks are available in different types these are: 

Local Area Network (LAN) LAN connects two or more communication devices (like computers and printers) over a comparatively short distance. LANs usually work within an office premises, a factory or a campus where communication devices are connected through a cable, within a distance of 2000 feet. Most LAN networks are shared medium networks, where the workstations shares and waits for its address use a resource like printer, plotter etc. Newer terms like WLAN and Bluetooth Technology also are related to LAN today. Wireless Local Area Network (WLAN) Wireless local area network provides LAN connectivity within a small geographic area, where cabling is either not possible or would very cumbersome, for instance, you may wish ts) provide LAN connectivity in an Open air restaurant! Bluetooth Technology Bluetooth technology may be a wireless medium for sharing information across computers and other electronic devices like mobile phones, Personal Digital Assistants (PDAs) etc., using low power frequency . 

Wide Area Network (WAN) WAN networks span larger areas than a single building or a campus. They are long-haul networks covering wide geographical areas and sometimes require multiple communication connections like leased lines, satellites and microwave radio links to interconnect various LANs. LANs are usually measured in feet, while WANs are measured in miles. 

Metropolitan Area Networks (MAN) a gaggle of LANs connected through a high-speed. seamless interconnection, within a 'metropolitan' area, is termed as a Metropolitan Area Network (MAN). The word 'metropolitan' doesn't necessarily mean a 'city' but are often any area that's opened up , but is treated together entity, e.g. a company having its two buildings on the other sides of the road. MAN connects users with computer resources in a geographic area that is larger than that covered by a LAN but smaller than the area covered in WAN. 

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