The data link layer. In the OSI (Open Standards Interconnection) model, there are a total of seven layers. Layer 2 is concerned with procedures and protocols for operating the communication lines between networks as well as clients and servers. Layer 2 also has the ability to detect and correct message errors.

The data link layer in the OSI Model. For Ethernet, this applies to the Ethernet frame that contains the Ethernet destination address, Ethernet source address and 802.1Q/1p fields. See also Layer 3.

the data-link layer, defines the rules for sending and receiving information from one node to another between systems.

Covad manages a Layer 2 network, which means that we are able to carry any Layer 3 protocol (IP, IPX, Appletalk) that our customers wish to transport to their clients. It also means that Covad cannot see the Layer 3 packet as it is encapsulated within our Layer 2 ATM cell, making customers' data secure as it travels across the Covad Regional Network. Finally, Covad's Layer 2 network never crosses the public Internet, adding to the security of customer data."

The term used to describe the data link layer of the Open Systems Interconnection (OSI) reference model. See OSI.

Data-link Layer Receives and transmits data over the physical layer

Data Link Layer or MAC Layer. Contains the physical address of a client or server station. Layer 2 processing is faster than Layer 3 processing because there is less information to process.

Layer 2 refers to the data link layer of the commonly referenced multilayered communication model, Open Systems Interconnection (OSI). The data link layer contains the address inspected by a bridge or switch. Layer 2 processing is faster than layer 3 processing, because less analysis of the packet is required.

See Link layer.

Data Link At this layer, data packets are encoded and decoded into bits. It furnishes transmission protocol knowledge and management and handles errors in the physical layer, flow control and frame synchronization. The data link layer is divided into two sub layers: The Media Access Control (MAC) layer and the Logical Link Control (LLC) layer. The MAC sub layer controls how a computer on the network gains access to the data and permission to transmit it. The LLC layer controls frame synchronization, flow control and error checking. Ethernet Token Ring FDDI PPP HDLC Frame Relay ATM

The second, or data-link layer, of the open systems interconnection (OSI) model. The media access control (MAC) layer. Transmits packets across a Layer 1 physical link by reading the hardware or MAC source and destination addresses in each packet. Switching operates at Layer 2. Switches have a forwarding table of the hardware addresses of the devices connected to them. When packets arrive, the switch reads the Layer 2 address and if it matches one in the table, forwards it to that port.

Data link layer of the OSI reference model defined in ITU X.200. It is responsible for point-to-point delivery of a PDU. Layer 2 protocols have two basic classes: reliable (meaning delivery is guaranteed or an error is reported) and unreliable (meaning delivery might not occur with no indication to the upper layers).

Data link layer where packets are encoded and decoded.

In the (OSI) model, the datalink layer is concerned with the optimization of data for transmission.