Quick Answer: What Is Mac In Data Link Layer?

The data link layer (Layer 2) of the OSI model actually consists of two sublayers: the Media Access Control (MAC) sublayer and the Logical Link Control (LLC) sublayer.

The MAC sublayer controls device interaction.

The LLC sublayer deals with addressing and multiplexing..

The data link layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking. … The data link layer provides the functional and procedural means to transfer data between network entities and might provide the means to detect and possibly correct errors that may occur in the physical layer.

The data link layer takes the data bits and “frames,” and creates packets of the data to guarantee reliable transmission. This layer adds source and destination addresses to the data stream as well as information to detect and control transmission errors. The data link layer has two sublayers.

For effective data communication between two directly connected transmitting and receiving stations the data link layer has to carry out a number of specific functions as follows:Services provided to the network layer: … Frame synchronisation: … Flow control. … Error control: … Addressing: … Control and data on same link:More items…

Data Link Layer Design IssuesProviding services to the network layer.Framing.Error Control.Flow Control.

Bluetooth low energy (BLE) is a short-range communication network protocol with PHY (physical layer) and MAC (Medium Access Control) layer.

What are the 2 main functions of the MAC sublayer?

The MAC sublayer has two primary responsibilities: Data encapsulation: Includes frame assembly before transmission, frame parsing upon reception of a frame, data link layer MAC addressing, and error detection.

What is the function of MAC sublayer?

The MAC sublayer emulates a full-duplex logical communication channel in a multipoint network. This channel may provide unicast, multicast, or broadcast communication service. The MAC sublayer uses MAC protocols to prevent collisions.

What is MAC Media Access Control and why is it important?

A media access control is a network data transfer policy that determines how data is transmitted between two computer terminals through a network cable. … The essence of the MAC protocol is to ensure non-collision and eases the transfer of data packets between two computer terminals.

A data link is the means of connecting one location to another for the purpose of transmitting and receiving digital information (data communication).

For the most part, the link layer is implemented in a network adapter, also sometimes known as a Network Interface Card (NIC).

The main service provided is to transfer data packets from the network layer on the sending machine to the network layer on the receiving machine. … In actual communication, the data link layer transmits bits via the physical layers and physical medium.