Data Link Layer (DLL) is the second layer of the OSI model which takes services from the Physical layer and provides services to the network layer. DLL transfers the data from a host to a node or a node to another node. The main task of the data link layer is to take a raw data from transmission facility and transform it into a line that appears free of transmission errors to the network layer. Data packets are encoded and decoded into bits. These are called frames. The Fun<wbr>ctions of the Data Link Layer are Framing, Frame synchronisation, Error Handling Flow Regulation, Addressing and Access Control. The data link layer is divided into two sublayers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sublayer controls how a computer on the network gains access to the link resources and grants permission to transmit it. The LLC layer controls frame synchronisation, flow control and error checking

What is the main task of the data link layer?

To provide services to the physical layer

To transfer data from a host to a node

To transform raw data into error-free frames for the network layer

To control how computers on the network gain access to link resources

What are data packets called in the data link layer?

Bits

Frames

Packets

Segments

What are the functions of the data link layer?

Framing, flow regulation, and addressing

Error handling, frame synchronisation, and access control

All of the above

None of the above

How is data encoded and decoded in the data link layer?

Into segments

Into packets

Into bits

Into frames

What are the two sublayers of the data link layer?

The Physical and Network layers

The Media Access Control (MAC) and Logical Link Control (LLC) layers

The Transport and Session layers

The Presentation and Application layers

What does the MAC sublayer control?

Frame synchronisation, flow control, and error checking

Addressing and access control

How a computer gains access to link resources and permission to transmit

None of the above

What does the LLC sublayer control?

How a computer gains access to link resources and permission to transmit

Frame synchronisation, flow control, and error checking

Addressing and access control

None of the above

What is framing in the data link layer?

The process of encoding and decoding data into frames

The process of controlling how computers gain access to link resources

The process of dividing a stream of bits into manageable units

None of the above

What is flow regulation in the data link layer?

The process of controlling how computers gain access to link resources

The process of synchronising frames between sender and receiver

The process of managing the rate of data transmission

None of the above

What is error handling in the data link layer?

The process of controlling how computers gain access to link resources

The process of detecting and correcting errors in transmitted data

The process of synchronising frames between sender and receiver

None of the above

What is addressing in the data link layer?

The process of controlling how computers gain access to link resources

The process of identifying the source and destination of a frame

The process of synchronising frames between sender and receiver

None of the above

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