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myCBSEguide.com, A Complete guide for CBSE students, , CBSE Class 12 Computer Science (Python), Computer Networks and Devices, , Revision Notes, Start here in points., Anetwork is a collection of interlinked computers by means of a communication, system., , The networks facilitate resource sharing, increased reliability, reduced costs, and, increased and fast communication., , On the basis of geographical spread, networks can be classified into LAN (Local Area, Netowrk), and WAN (Wide Area Network)., , Small computer networks that are confined to a localised area e.g., an office, a, building etc., are called LANs., , A WAN is a group of computers that are separated by large distance and tied together., It can even be a group of LANs that are spread across several locations and connected, together to look like a big LAN., , On the basis of component roles, networks can be classified into: a peer-to-peer, network and a client-server network., , A Client computer (or a client) is a computer or other device on the other device on, the network that requests and utilizes network resources., , A Server is a computer on network, dedicated to processing client requests., , In a peer-to-peer network, all computers are equal; each can double up as a client as, well as a non-dedicated server., , A client/server network has computer(s) designated as server(s) and these are, dedicated servers. Clients do own job and the servers serve the requests of the clients., A hub is a hardware device used to connect several computers together. Hubs can be, either active hubs or passive hubs., , A switch is a device that is used to segment networks into different sub-networks, called subnets or LAN segments., , A bridge is a device that links two networks together., , A router is a device that works like a bridge but can handle different protocols., , A gateway is a device that connects dissimilar networks., , Material downloaded from myCBSEguide.com. 1/2

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& myCBSEguide.com, , A Complete guide for CBSE students, , e Anaccess point (AP), also called wireless access point (WAP), is a hardware device, that establishes connection(s) of computing devices on wireless LAN with a fixed wire, network., , e The cloud is a generic term for the Internet., , e JOT is a phenomenon that connects the smart devices to the Internet over wireless, connections., , e IOT technology uses other technologies like RFID, sensors, smart technologies like, controllers and specialized software., , Material downloaded from myCBSEguide.com. 2/2