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# CS601 Data Communication Assignment # 04 Due Date: 4 Feb-2016

Assignment No. 04

Semester: Fall 2015
Data Communication-CS601

Total Marks: 15

Due Date: 4 /02/2016

Instructions:

• You will submit your assignment before or on due date on VU-LMS.
• Assignment sent via Email will not be replied and accepted/graded in any case.
• If the submitted assignment does not open or file is corrupt, it will not be graded.
• Assignment should be completed by your own efforts it should not be copied from internet, handouts or books.
• You will submit solution only in the Microsoft Word File.
• Assignment is covered from lectures 29 to 34.

For any query about the assignment, contact at cs601@vu.edu.pk

Assignment Questions

Questions:                                                                                                                                Marks 15

Question. 1                                                                                                                             (5 Marks)

(A) Consider a sender wants to send a message “FRAME”, you are required to fill the empty column by using VRC even parity technique against given ASCII codes in following table.

 Character ASCII CODES VRC parity bit F 01000110 R 01010010 A 01000001 M 01001101 E 01000101

(B)  Calculate CRC,Quotient and No of Extra bits which will be added by using Module-2 Division Where  Divisor=110011 , Message= 11100011                                    (5 Marks)

Question. 2                                                                                                                          (5 Marks)

Four channels, each with a 50-kHz bandwidth, are to be multiplexed together. What is the

minimum bandwidth of the link if there is a need for a guard band of 20 kHz between the

channels to prevent interference?

Best of Luck

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### Replies to This Discussion

Question # 1. k part (B) mai kis lecture ko follow karna ha???

ye ap ny kis lecture ko follow kr k solve kia ha???

Cs601 Assignment No-04

Data Communication

2/4/2016

Mc150402462

Mustansar Ali

Question. 1                                                                                                                             (5 Marks)

(A)  Consider a sender wants to send a message “FRAME”, you are required to fill the empty column by using VRC even parity technique against given ASCII codes in following table.

 Character ASCII CODES VRC parity bit F 01000110 1 R 01010010 1 A 01000001 0 M 01001101 0 E 01000101 1

B)

Calculate CRC,Quotient and No of Extra bits which will be added by using Module-2 Division Where  Divisor=110011 , Message= 11100011

110011        111000110000

110011

101111

110011

111000

110011

101100

110011

111110

110011

Crc  =  11010

Crc =10110

Quotient = 10010110

No of Extra Bits = 5

Question. 2

Four channels, each with a 50-kHz bandwidth, are to be multiplexed together. What is the

minimum bandwidth of the link if there is a need for a guard band of 20 kHz between the

channels to prevent interference?

Total channels = 4

Total Ferquency of single channel = 50

Total guard band=3

Guard Band Ferquency = 20

Bandwidth = Freq of chanel * total channel + guard band freq * total guard band

Bandwidth = 50*4+20*3

Bandwidth=  260 KHz

Complete and final solution By  BaY NaAM LoG (MIT)

Attachments:

CS601 assignment 4 solution 2016

Attachments:

Question # 1. k part (B) mai kis lecture ko follow karna ha???

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