Data Link Layer Design Issues | computer Networks and its Responsibilities
Data Link Layer Design Issues | computer Networks and its Responsibilities
In this video explains Data link layer in computer Networks and its Responsibilities.
The data-link layer is responsible for receiving data bits from the physical layer and formatting these bits into groups, called data-link frames. Different data-link standards have varying data-link frame formats and definitions, but in general this layer reads the bit fields of these frames to ensure that entire frames are received, that these frames are error free, that the frame is meant for this device by using the physical address retrieved from the networking hardware on the device, and where this frame came from.
Data-link layer is the second layer after the physical layer. The data link layer is responsible for maintaining the data link between two hosts or nodes.
Before going through the design issues in the data link layer. Some of its sub-layers and their functions are as following below.
The data link layer is divided into two sub-layers :
Logical Link Control Sub-layer (LLC) –
Provides the logic for the data link, Thus it controls the synchronization, flow control, and error checking functions of the data link layer. Functions are –
(i) Error Recovery.
(ii) It performs the flow control operations.
(iii) User addressing.
#computernetwork #cnc #network #computerscience