Normally it’s the link layers responsibility to encode/decode messages. is a network layer message data as delivered to the link layer, which is encoded according to
Nov 15, 2016 · The data link layer is used for the encoding, decoding and logical organization of data bits. Data packets are framed and addressed by this layer, which has two sublayers. The data link layer's first sublayer is the media access control (MAC) layer. It is used for source and destination addresses. Feb 10, 2015 · The data link layer provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the physical layer. Originally, this layer was intended for point-to-point and point-to-multipoint media, characteristic of wide area media in the telephone system. The data link 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. The data link layer provides the functional and procedural means to transfer data between network entities and Data Link Layer (2) The data link layer takes the packet from the network layer and breaks it into frames. The header in this layer provides the source and destination MAC addresses. 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. Data Link Layer Protocols. Based on Media used, Data link Layer encapsulates IP Packets into HDLC, PPP, Frame Relay, or Ethernet frames, and since Data-Link Layer deals straight with the physical layer that might be different technology on each Hop, Data-Link Layer must use different types of protocols (Or be able to speak each cable language) to reframe/repackage IP packets across different
The data link layer is responsible for a. framing data bits b. providing the physical addresses of the sender/receiver c. data rate control d. detection and correction of damaged and lost frames
The main task of the data link layer is to transform a raw transmission facility into a line that appears free of undetected transmission errors to the network layer. It accomplishes this task by having the sender break up the input data into data frames (typically a few hundred or few thousand bytes) and transmit the frames sequentially. The data link layer provides services to the network layer. It receives services from the physical layer. The scope of data link layer is node-to-node. 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. We encapsulate and decapsulate at each node
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 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 main task of the data link layer is to transform a raw transmission facility into a line that appears free of undetected transmission errors to the network layer. It accomplishes this task by having the sender break up the input data into data frames (typically a few hundred or few thousand bytes) and transmit the frames sequentially. The data link layer provides services to the network layer. It receives services from the physical layer. The scope of data link layer is node-to-node. 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. We encapsulate and decapsulate at each node Data link layer is responsible for converting data stream to signals bit by bit and to send that over the underlying hardware. 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.