Understanding Computer Networks

Explain the main purpose of the OSI model.

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What is the primary function of the Physical layer?

• To manage network protocols and data formats.

• To transmit raw bits over a physical medium.

• To encrypt data for secure transmission.

• To provide error detection and correction.

Differentiate between circuit switching and packet switching.

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Define the Data Link Layer and its importance in networking.

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What are LRC, VRC, and CRC used for?

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What is line discipline in networking?

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Describe flow control and its significance in data transmission.

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What is error control and how is it implemented?

• Error control is a technique for detecting and correcting errors in data transmission and storage, implemented using methods like checksums, parity bits, and error-correcting codes.

• Error control is only for software applications.

• Error control is a method for increasing data storage capacity.

• Error control is irrelevant in modern data transmission.

Define multiple access in the context of network communication.

• Multiple access is a technique for increasing network speed.

• Multiple access is a method that enables multiple users to share the same communication channel in network communication.

• Multiple access refers to a single user controlling the entire channel.

• Multiple access is a method for encrypting data in communication.

What is random access and how does it work?

• Random access means accessing data in a specific order.

• Random access is the ability to access data at any location in a storage medium directly.

• Random access requires data to be stored in a linear format.

• Random access is only possible in sequential storage systems.