It is for information only and should not be used for product design or any other application or engineering.

Data link layer is responsible for converting data stream to signals bit by bit and to send that over the underlying hardware. Data Link Layer (2) The data link layer takes the packet from the network layer and breaks it into frames. The data link layer is responsible for encoding bits into packets prior to transmission and then decoding the packets back into bits at the destination. Publication of the current M-Bus specification. The Open Systems Interconnection (OSI) Data Link layer is the lowest layer at which meaning is assigned to the bits that are transmitted over the network.Data link protocols address things like the size of each packet of data to be sent, a means of addressing each packet so that it’s delivered to the intended recipient, and a way to ensure nodes don’t try to transmit data at the same time. The layers include the physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and application layer.
The lower MAC layer defines the media access method, which can be CSMA/CD (carrier sense multiple access/collision detection), token ring, or other IEEE physical interface. The data link layer provides services to the network layer. It is the data link layer that will convert the data into binary digits such as 1 and 0 and then prepare them for the physical layer. It responds to service requests from the network layer above it and issues service requests to the physical layer below it.. It also serves to control the flow of data that will traverse the physical media. The header in this layer provides the source and destination MAC addresses. Data link layer performs the most reliable node to node delivery of data. This documentation reflects the M-Bus specification from the late 1990s. The Data Link PDU is the Frame. its function is to primarily prepare packets for transmission over the physical media. The OSI model is used for understanding the architecture of the network and based on that, the telecommunication products can be designed by taking reference from it. In the OSI model, the data link layer is a 4 th layer from the top and 2 nd layer from the bottom. It also synchronizes the information which is to be transmitted over the data. The data link layer is the second layer in the OSI (open systems interconnection) seven-layer reference model. Data Link Layer: The data link layer is used for the encoding, decoding and logical organization of data bits. ; The communication channel that connects the adjacent nodes is known as links, and in order to move the datagram from source to the destination, the datagram must be moved across an individual link. Data Link Layer. Here is an additional issue in the data link layer with broadcast networks that is how to control access to the shared channel. It forms frames from the packets that are received from network layer and gives it to physical layer. When a packet is travelling in the internet, the data link layer of the node is responsible for delivering a datagram to the next node in the path. Data link layer. The data layer, or layer 2, is the second layer of the seven-layer OSI model of computer networking.This layer is the protocol layer that transfers data between adjacent network nodes in a wide area network (WAN) or between nodes on the same local area network (LAN) segment. Explanation: The data link layer is divided into two sub layers, namely Logical Link Control (LLC) and Media Access Control (MAC). Functions of Data Link Layer. LLC forms a frame from the network layer PDU into a format that conforms to the requirements of the network interface and media. It is used for source and destination addresses. The data link layer's first sublayer is the media access control (MAC) layer. The actual data link layer is split into two sublayers, called the MAC (Medium Access Control) sublayer and the LLC (Logical Link Control) sublayer, as shown in Figure D-11. The physical layer makes certain demands on the data link layer. At the receiving end, Data link layer picks up data from hardware which are in the form of electrical signals, assembles them in a recognizable frame format, and hands over to upper layer. A data link-layer address is the address of the physical address of the card or port, which connects to the network channel. The two main functions performed at this layer include. The data link layer is concerned with local delivery of frames between devices on the same LAN. Data packets are framed and addressed by this layer, which has two sublayers.

The scope of data link layer is node-to-node. It receives services from the physical layer.


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