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1. Define Network?
Explanation: A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes.

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2. What is a Link?
Explanation: At the lowest level, a network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Link.

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3. What is a node?
Explanation: A network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Links and the computer it connects is called as Nodes.

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4. What is a gateway or Router?
Explanation: A node that is connected to two or more networks is commonly called as router or Gateway. It generally forwards message from one network to another.

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5. What is point-point link?
Explanation: If the physical links are limited to a pair of nodes it is said to be point-point link.

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6. What is Multiple Access?
Explanation: If the physical links are shared by more than two nodes, it is said to be Multiple Access.

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7. What are the advantages of Distributed Processing?
Explanation: a. Security/Encapsulationb. Distributed databasec. Faster Problem solvingd. Security through redundancye. Collaborative Processing

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8. What are the criteria necessary for an effective and efficient network?
Explanation: a. Performance It can be measured in many ways, including transmit time and response time. b. Reliability It is measured by frequency of failure, the time it takes a link to recover from a failure, and the network\'s robustness.c. Security Security issues includes protecting data from unauthorized access and virues.

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9. Name the factors that affect the performance of the network?
Explanation: a. Number of Usersb. Type of transmission mediumc. Hardwared. Software

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10. Name the factors that affect the reliability of the network?
Explanation: a. Frequency of failureb. Recovery time of a network after a failure

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