There is no frame send by the data link layer of the sender site until its network layer has a data packet to send. Let us now take a look at the procedure used by the data link layer at both sides(sender as well as the receiver). The procedure used by the data link layer The data link layer also uses the services provided by the physical layer such as signaling, multiplexing, etc for the physical transmission of the bits. The Datalink layers of both sender and receiver mainly provide transmission services for their Network layers. On the Receiver site, the data link layer receives the frame from the physical layer and then extracts the data from the frame, and then delivers the data to its network layer.
The data link layer at the sender side mainly gets the data from the network layer and then makes the frame out of data and sends it. The flow control is not needed by the Simplest Protocol. We can also say that in the case of this protocol the receiver never gets overwhelmed with the incoming frames from the sender. In this, the receiver can immediately handle the frame it receives whose processing time is small enough to be considered as negligible.īasically, the data link layer of the receiver immediately removes the header from the frame and then hand over the data packet to the network layer that also accepts the data packet immediately. The simplest protocol is basically a unidirectional protocol in which data frames only travel in one direction from the sender to the receiver. Simplest Protocol is a protocol that neither has flow control nor has error control( as we have already told you that it lies under the category of Noiseless channels). In this tutorial, we will be covering the Simplest Protocol that lies under the category Noiseless Channels in the Data link layer.
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