Published Paper Details:

Data link layer deals with flow control and error control mechanism in networks. in generally there are three protocols are used for flow control and error control mechanism, The efficient transmission of data over unreliable channels that can lose, reorder and duplicate messages due to router or receiver limited buffer space, are retransmitted by the source. If the error detected the receiver can try to obtain the error by using three flow and error control protocol ARQ techniques, Selective repeat protocol gives better transmission efficiency than other protocols. In selective repeat ARQ, only the specific damaged or lost frame is retransmitted. If a frame is corrupted in transit, a NAK is returned and the frame is resent out of sequence .the receiving device must be able to sort the frames, it has and insert the retransmitted frame into its proper place in the sequence, in this paper using ARQ techniques, comparing transmission efficiency of three protocols and selective repeat protocol is ideal.[1][2]