5. Link and LAN Technologies

Error Control — Quiz

Test your understanding of error control with 5 practice questions.

Practice Questions

Question 1

Which of the following error detection techniques is based on polynomial codes and is highly effective at detecting burst errors?

Question 2

In a Go-Back-N ARQ protocol, if the sender has a window size of $N$ and sends frames $0, 1, 2, \dots, N-1$, and frame $k$ (where $0 \le k < N$) is lost, what will the sender do upon timeout?

Question 3

A data link layer protocol uses a $4$-bit sequence number for its frames. What is the maximum number of unacknowledged frames that can be outstanding in a 'Selective Repeat' ARQ protocol?

Question 4

Which of the following is a key characteristic that differentiates 'Selective Repeat' ARQ from 'Go-Back-N' ARQ?

Question 5

A Cyclic Redundancy Check (CRC) uses a generator polynomial $G(x) = x^4 + x + 1$. If the data to be transmitted is $11010_2$, what is the length of the CRC checksum (FCS) that will be appended to the data?