A hub is hardware networking device that connects multiple nodes in a network and send and receive data from all the connected nodes. A hub contains multiple ports that are used to connect multiple nodes. A hub is best suitable for creating small home network (LAN). Hubs can be categorized in two types: Active Hub: […]
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Modem plays very important role to connect computer or any other device such as router or switch to the Internet. it converts (modulate) an analog signal from telephone or cable wire to digital data that a computer can recognize. Similarly, it converts (demodulate) digital data from a computer or other device into an analog signal
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Star and bus topology Star topology Bus topology All nodes are connected to central hub All nodes are connected with single cable called backbone It is more expensive It is less expensive Chances of data collision is low Chances of data collision is high Failure of a node may affect entire network Failure of a
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Factors that govern the selection of a topology for a network are listed hereunder: Cost Flexibility Reliability Future Expansion Size of network Security
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Following are the topologies mostly used: Star Topology Star topology: It is one of the most commonly used topology. In a star topology, nodes are not connected to each other, instead are connected to a central device called hub or switch. Information sent by a computer is received by hub/switch, which than determines which node
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Various types of networks are: Local Area Network (LAN) A Local Area Network is a collection of interconnected Computers and its associated devices that are located in a close proximity. Wide Area Network (WAN) A Wide Area Network is a collection of interconnected Computers and its associated devices that are located at different Geographic location
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What is computer network When two or more similar things or objects get connected with each other, it becomes a Network. There are various examples of Network as given below: Computer network Mobile network Social Network Organizational Network such as Bank, Airlines, Railway etc. Goals of network Information sharing Resource sharing Storage sharing Enhanced communication
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Get Sumita Arora Textbook Solution of IP Class 12 Unit 3 Chapter 9 Introduction to Computer Network short questions, Long practical Question Answer Short Question Answer What is a network? What are its goals and applications? Discuss and compare various types of network. Explain various mostly used topologies. Discuss the factor that governs the selection
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Security: Security is the major concern of IoT. Connectivity: Connecting so many different devices of IoT and managing them is also a serious concern of IoT.
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The ‘Internet of things’ is a network of interrelated mechanical and digital devices, computing devices and other objects that have embedded hardware and software to communicate with others on the same network without the need of any human-to-computer or human-to-human interaction. Some potential applications of IoT are- Smart Home security system Smart Cities Smart Wearable
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