ece6607-Homework 3 - a CRC. Which is done rst by the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 6607 Homework #3 Due on September 30 1. Consider a 128K bits-per-second link carrying 1,500-byte packets over a satellite link. Compute the efficiency of the go-back N protocol for the following values of W s : (i) W s = 1 (the stop-and-wait protocol); W s = 7; and W s = 127. Assume all acks are piggybacked and are sent at the time a frame is received. 2. Consider a data-link layer protocol that does bit stuffing as well as error detection via
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: a CRC. Which is done rst by the sender: bit stung or the CRC? Explain. 3. Why is there an address eld in the HDLC header? After all, the HDLC is a point-to-point protocol. 4. Give three examples of unnumbered control frames in HDLC. Why are they called unnumbered? 5. What is the purpose of the protocol eld in PPP? 1...
View Full Document

This note was uploaded on 10/10/2010 for the course ECE 6607 taught by Professor Staff during the Fall '09 term at Georgia Institute of Technology.

Ask a homework question - tutors are online