CS642 - Networks and Data Communication CS642 Fall 2006 Assignment 3 1 Is the data link layer protocol necessary even if there were no bit errors

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Networks and Data Communication CS642, Fall 2006 Assignment # 3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1- Is the data link layer protocol necessary even if there were no bit errors or losses at the physical layer? Why or why not? Yes, it is needed. It provides many services other than handling bit errors. 1- It provides the service interface to the network. 2- It prepares the frames to be sent and received. 3- Control the flow of the frames. 2- Given the frame 10011101, what is the checksum bit assuming odd parity? - Repeat the above question if the even parity is used. Odd parity: checksum bit is 1. Even parity: checksum bit is 0. 3- A generator function for polynomial detection technique is given as X 5 + X 2 + 1. a- What is the generator function in binary form? G(x)= 100101 b- What is the checksum for the following frame in binary and in polynomial forms? 1 0 0 1 0 1 1 0 1 1 1 2
Background image of page 2
4- Assuming a framing protocol that uses bit stuffing, answer the following questions: a- Show the bit sequence transmitted over the link and mark the stuffed
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/30/2008 for the course CS 643 taught by Professor Dr.fergany during the Fall '06 term at New Haven.

Page1 / 7

CS642 - Networks and Data Communication CS642 Fall 2006 Assignment 3 1 Is the data link layer protocol necessary even if there were no bit errors

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online