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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:

Please read the following instructions carefully before submitting the assignment:

• 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

1st m error found krna h kya????

Complete solution ...........

do mention if anyone finds an error

how to find we CRC,Quotient Ans specilly extra bits anyone explain here?

y apnyy guard bands = 3 ksy leay hn?????

orrr y formula kn say lectr m h?????

ooorrr 1st qstion m CRC , quotient ksy find kia h????

1 minimum guard bands required are 1 less than the total channels
2 formula lectures mein nahi hy mila mujhy b,online help li hy
3 long division se

long division

thanks brother you have done nice job

i check whole assignment and there is no error in this assignment

thanks again

regards

can any one tell me???

Mohsin Bhai ye ap ne CRC kasa kia h .plz is ki jo division ap ne ki h wo dikha dn

Answer of question 1 B:

Quotient = 101101101111
CRC = 00000
No. of bits added = 9

bhai jan are u share the link

FRIENDS humary qustion k mutabiq four (4) bandwidth k liy 3 guard aay gay according to the example. SEE this example and solve the qustion.

and gave ur coments thanks.

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