Question (a) A CRC is constructed to generate a 4-bit FCS for an 11-bit message. The divisor polynomial is X4 + X3 + 1 (i) Encode the data bit sequence 00111011001 using polynomial division and give the code word. (ii) Assume that 7th MSB in the data bit sequence above gets corrupted during transmission, show how the detection algorithm detects the error. Question (b) What is the difference between Synchronous TDM and Statistical TDM? (c) In respect to HDLC: (i) State the three data transfer modes of operation. (ii) Give the structure of generic HDLC frame. (iii) Explain why HDLC uses 'bit stuffing'. Question (d) With the aid of sketches, explain the difference between the following two transmission modes used with optical fibre: (i) Graded-index Multi-mode and (ii) Mono-mode. Posted Date: 10/18/2013 12:58:56 AM | Location : United States

Ask an Expert

Your posts are moderated

Write your message here..

Related Questions

Caralouer case study: analysis and design techniques, CarALouer provides re... CarALouer provides rental of cars to its customer on a regional basis i.e. a car is attached to a regional home-base which also houses a regional office of the company. Each regi

Syntax conversion, Write down the significance of the syntax conversion . S... Write down the significance of the syntax conversion . Syntax Conversion is described below: Syntax conversion is a significant function carried out in the presentation layer. I

What do you understand by demilitarized zone, Problem 1: What does the ... Problem 1: What does the SNMP access policy show? SNMP community diagram SNMP access policy Problem 2: Does there exist any formal functional specificat

Design a network layout, QUESTION: (a) Below is a capture of an Ethern... QUESTION: (a) Below is a capture of an Ethernet II frame which contains an IPv4 packet and a TCP segment. Give the source MAC address for the frame in hexadecimal; the sourc

Categories of controls-information security, Categories of Controls Cont... Categories of Controls Controlling risk through mitigation, avoidance or transference is accomplished by implementing controls. There are 4 effective approaches to select the co

Man-in-the-middle attacker, - Alice, Bob and Charlie have a secret key a=3,... - Alice, Bob and Charlie have a secret key a=3, b=4, c=5, in that order. - They would like to find a common secret key using Diffie-Hellan key exchange protocol (with g=2, p=5).

Identify possible controls-information security, Identify Possible Controls... Identify Possible Controls For each threat and linked vulnerabilities which have residual risk, create primary list of control ideas. Residual risk is the risk which remains to

Firewalls-information security, Firewalls A firewall in an information s... Firewalls A firewall in an information security program that prevents specific types of information from moving between the outside world and the inside world. The firewall may

Pseudonymous remailers and cypherpunk remailers, Problem (a) As a fore... Problem (a) As a forensic investigator, you are needed to trace the source of an email. It is suspected that the email header has been forged. Show how you would proceed to

Illustrate the term file carving, QUESTION (a) Illustrate the term fil... QUESTION (a) Illustrate the term file carving. (b) What are the basic three main techniques for image steganography? (c) Distinguish between vector graphics and raster