Cyclic Redundancy Check (CRC) - Part 2

Computer Networks: Cyclic Redundancy Check in Computer Networks
Topics Discussed:
1) Cyclic Redundancy Check (CRC).
2) Operation of CRC at the receiver side.
3) Homework problem on CRC.
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#ComputerNetworksByNeso #ComputerNetwork #ErrorDetection #CRC

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[@nsbofficial3908]

Sir plzzz explain part 1 answer

[@Gymboy805]

My exams are near and i didn't took a single class at the univerisity. Thanks to all the youtubers like yo. You guys make itso easy for backbencher students like me

[@manish__g]

Divisor-1001 Divided-11001001000 Crc- 011 Then message has to transfer-11001001011 Then remainder after currupt the 3rd bit- 100

[@Mr.CineCentral]

bro the remainder after corrupting the 3rd bit is 111 the remainder before corrupting is 011 and quotient is 11010011 - before corrupting quotient is 11110111 - after corrupting

[@parasusainikhil4521]

yup same.

[@siddharthrajesh8345]

@@Mr.CineCentral dude this is wrong. After corruption, the remainder is 100 only... The corrupted code is 11101001011

[@vidhanrathore5954]

Thankyou

[@thalafan9288]

Yes it's correct same answer 👍🏼

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Well explained...

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[@techmoon_]

SENDER'S SIDE : DATA = 11001001 DIVISOR = 1001 AFTER BINARY DIVISION : QUOTIENT= 110100000(extra l-1 bits appended) REMAINDER = 011 DATA TRANSMITTED = 11001001011 RECEIVER'S SIDE : DATA RECEIVED = 11101001011(3rd bit corrupted) DIVISOR = 1001 QUOTIENT = 11110111 REMAINDER=100 So error DETECTED...

[@bhargavigrandhi1247]

At receivers side why did u took divisor 11110111?

[@techmoon_]

@@bhargavigrandhi1247 I've changed it actually quotient I guess

[@oldmos9428]

i got same result as you in the receiver side but in the remainder i got 111 and u got 100? lol

[@rockybrother921]

@@oldmos9428 i am also getting 100

[@wajih7307]

@@rockybrother921 me too

[@mohamedkanu66]

The homework would produce 100 as remainder of the division after corrupting the data. The presence of the 1 thus demonstrated the data was corrupted in transit. The generated CRC code before corrupting the data is 011. Anybody got the same solution?

[@mdmuquimakhter5145]

Same

[@jenjacob8631]

Yup... I got the same answer

[@vikteur5465]

Shouldn't the reminder of the division be "0" if there have not been any errors? I've gotten the same result as you (011) but this means that there have been errors in the transmission, no?

[@akagaming6926]

I got same result too

[@gamer-zy1uj]

I got 010 as crc 😭😭 someone help me🙏🙏

[@nicolemagume5495]

This was really helpful thank you so much

[@younsookim4790]

thanks man. it help a lot

[@dinkarkumar02]

Wow amazing studying Sir ji

[@hemasundarkasturi5439]

Perfectly cleared Thank you 🙏🙏👌👌💕💗

[@nigelkundaigatsi205]

Thank you for providing this good stuff ,it's lit 🔥

[@daxeshsoni3838]

Before corrupt the data: Divisor:1001 Dividend:11001001000 Quotient: 11010011 Remainder(CRC):011 After corrupt the data: Divisor:1001 Dividend:11101001011 Quotient: 11110111 Remainder(CRC):100 How many agree with this answer?

[@kiranchakrala5895]

Yes it's correct

[@anupamtiwary4265]

How is the divisor 1001. Could you please explain?

[@yBazo82]

yo this is very helpful bro

[@cryptofreak3429]

Can you do the CRC without simplication in last step? Can't understand that simplication

[@sanjeevanibhandari5652]

CRC : 011 Transmitted message: 11001001011 Corrupted message : 11101001011 Remainder of corrupted message : 100

[@varunreddy2383]

Yeah I got the same

[@varunreddy2383]

@sanjeevani bhandari where are u from? I mean from which university you are?

[@manish__g]

Rut

[@techmoon_]

Correct

[@allspirituality8471]

I got the same answer.

[@bhavya2301]

For the last question you mean to say we need to perform CRC for uncorrupted data? and then change 1 bit among it into error and then perform CRC again to check error? isn't it?

[@bhargavigrandhi1247]

Yes

[@shikkalandar2611]

I love your English

[@siasecurityprogramming7007]

thank you

[@kiranchowdary3867]

What if CRC that is sending from sender is corrupted..? And by any chance ,the divison operation done by reciever with corrupted CRC gives remainder 0,how will this receiver handle...?

[@mandhgames232]

thanks a lot

[@aimannaim9790]

thank god you help me alot

[@kainuisp358]

Thank you so much

[@valtinryu8147]

I'm sure this depends on the application, but what are some examples of what happens when the receiver detects corrupted data? Is the sender notified? Is the corrupted data simply thrown out?

[@rajeshprajapati4863]

It can be handled in two ways : - Receiver can have the Sender re-transmit the entire data unit. - The Receiver can use an error correcting code, which automatically corrects certain errors.

[@gradientO]

Awesome

[@preetichib9568]

Thanks a lot !!!! 🙏🙏🙏

[@sindhujalingampally6066]

Sir my doubt is , In the 1 pb before data transmission when u got 2 0's(0110) their u took (0000) at the bottom, But comming to after transmission when u got two 0's (0011)again but here u took both the 0and 1 from transmitted data at a time, but y it is different in both cases....🤔🤔 Sir can you please help me to understand this.....

[@alwayslakshmipathi2532]

There is no difference. you can try the same by yourself as he did previously

[@andythomson2227]

Really worth.....

[@vanamabhinaytinku6552]

Tq very much sir tq

[@ajeetstationajeet]

the division he is using here is called the modulo 2 binary division it is performed by xoring not by subtracting

[@rocky5817]

And why you not added three zeroes at end

[@yahyaabulhaj6840]

successfully transmitted !!

[@bgmpremier8947]

Thank you sir

[@shivambhatt9005]

what's the performance of CRC ?

[@Vanshika-tz8gv]

how many bits should be taken in the divisor?

[@allspirituality8471]

I get it in the receiver side the remainder finally 100 =>>there is error

[@bhargavmarathe8920]

Receiver knows that data is corrupt, is it possible to know exactly which bit is correct at rx side...?

[@narendharkompelly4731]

Pls add videos as early as possible

[@venkatsai5149]

Tq

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[@saisravani2625]

remainder at receiver end is 100

[@gouthams1074]

i'm having a doubt in this video you mentioned polynomial long division but performed binary long division is there any differnce are both are the same

[@ezgiyazar5447]

they are same. the point is to look only at the first digit at every step.

[@sagaradhikari2893]

Can you lz provide solution..i cant understand the homework?

[@damareswaramaddepalli9714]

Home work problem answer sender side transmitted data = 1101001101 receiver side received data =1111001101 . . . reminder = 110 => reminder is non zeros hence the data is rejected

[@dailymemes2512]

Wrong

[@damareswaramaddepalli9714]

@@dailymemes2512 then comment correct answer , it will help others

[@duchoang1074]

Crc is 011.

[@allspirituality8471]

CRC: 011 Remainder: 100

[@gamersstop585]

homework ans i got crc remainder : 011 reciver side remainder is 100 so there is a corruption in data anybody got same ans?

[@sagarmanda5161]

Crc :001 Data Transmitted:11001001011 At receiver side the remainder is 0000 so no corruption

[@wawan_ikhwan]

Can we just use 1 or just 0 as divisor? Or 1 bit divisior?

[@abhijeetsingh271]

Yes you can but it will become a very lengthy division also kind of defeat the purpose of CRC since we won't be able to calculate the CRC that is supposed to be L-1 bits which is zero.

[@animemoments7777]

Divisor : 1001 Remainder : 011 data after is 11001001011 Remainder : 000 conclusion : no data error

[@syedharoon2332]

Someone inform me please what's the divisor for homework prblm.thanks in advance ❤️

[@nbk330]

to know about the divisor..please watch the last lecture and then do the homework problem of that lecture..THAN ONLY U WILL SOLVE THIS HOME WORK PROBLEM..

[@premsainoolu8290]

1001

[@vgovindh1496]

i dont understand y u take 0 at the queoficient???

[@daniellai696]

i got 010 for the homework crc remainder help ;(

[@niteshmodi5468]

Facing problem on the homework problem, go to the next lecture.

[@dailymemes2512]

What if remainder is 1000 for 3 crc bits

[@karthikchowdary8444]

We can calculate if divisior is of 4 digits but if they given like 11001 as a divisior how can we do

[@luxurylifestytle]

put 4 zeros after the message or data and then divide it

[@p.tejeshreddyp.tejesh]

divisor is 1001

[@anmol_seth_xx]

Polynomial divisor is not clear

[@1dhdh]

Tx side: Dividend:1100100100 Divisor:1001 CRC:011 Rx Side:(altering left 3rd most bit) Dividend:11101001011 Divisor:1001 CRC:100 hence not equals to zero Thus,Rx will detects an error

[@SymonsChasel-f7w]

Gonzalez Amy Martin Sandra Perez Jason

[@papaikarmakar84]

Remainder is 100 hence error detected

[@SakshamSagar-ss5fe]

1 day before exam 🥲

[@harshbhansali1327]

same

[@SakshamSagar-ss5fe]

@@mn_lol Bahut achha

[@DevAbdoTolba]

help me i am under the water

[@ViratKohli-zg1nk]

😂

[@Healingfrompast]

Crc=111

[@mafujmolla5069]

produce remainder 100

[@harsh00721]

solve toh krna sikha do polynomial vale question

[@dharini2475]

8/7/21 02:09 am

[@b2_15_showptikdas7]

Remainder is 101 and not 000 therefore there is an error.

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[@davidesefinchese6090]

Hall William Martin Elizabeth Clark Matthew

[@msbanda2123]

👍

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❤❤🙏🙏

[@Techskoool]

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[@Amir_Fadhil]

.

[@popukuttansvlog1106]

♥️👍

[@anaghchandran]

🥰🥰

[@animemoments7777]

test

[@charanbodhanapati]

thank you

[@noony31122009]

Awesome

[@SuprajV-g5r]

❤❤🙏🙏

[@SuprajV-g5r]

❤❤🙏🙏

[@SuprajV-g5r]

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