Express Learning: Data Communications and Computer Networks

6

Error Detection and Correction

1. Explain various design issues of the data link layer.

Ans: Data link layer is responsible for efficient and reliable transmission of frames between two adjacent nodes connected via a single communication channel. However, sometime, the efficiency of data transfer is significantly affected due to finite data rate of communication circuits, non-zero propagation delay between the sending and the receiving times of a bit, and errors in connection. Thus, to achieve efficient data transmission, all these factors must be kept in mind. Some of the important design issues of data link layer are as follows:

Reliable ...