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a)very short answer?
1ans:-The National Informatics Centre
2ans:-There are two types of transmission media, namely guided and unguided. Guided transmission media are cables like twisted pair cables, coaxial cables, and fiber optic cables. Unguided transmission media are wireless, such as infrared, radio waves, and microwaves.
3ans:-The internet is the wider network that allows computer networks around the world run by companies, governments, universities and other organisations to talk to one another.
4ans;-Wi-Fi is a wireless networking technology that allows devices such as computers (laptops and desktops), mobile devices (smart phones and wearables), and other equipment (printers and video cameras) to interface with the Internet
Explanation:
b)short answer type questions.
1ans:-A WAN differs from a LAN because it is not restricted by geographic location. As opposed to a LAN which connects local devices to each other, a WAN connects LANs to each other, usually across multiple locations as well as individual devices that connect from a remote distance
2ans:-Peer-to-peer networks connect computers so that each computer shares all or part of its resources. Client-server networks have one or more central computers, or servers, that hold the data and manage resources.
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