Understanding Computer Networks

Explain the main purpose of the OSI model.

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.

Define the Data Link Layer and its importance in networking.

What are LRC, VRC, and CRC used for?

What is line discipline in networking?

Describe flow control and its significance in data transmission.

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.