Bug with the IPv6 compression quiz. | Coursera Community
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Bug with the IPv6 compression quiz.

  • 22 November 2019
  • 15 replies
  • 2614 views

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This quiz is giving me a incorrect answer message when i know it is correct. I have reloaded this quiz several times and there seems to be two what give a false error message. I have went over these addresses and double and triple checked them. After still getting a incorrect answer, I used a web to check my answer and make sure that i wasn’t just missing something and it gave the same answer I came up with in the first place.

 

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Best answer by Laura 25 November 2019, 21:34

Hi @AquaSwrd. You can get help in the Help Center. Here’s a good starting point: Report a problem with a course. Most courses use personalized deadlines so you can always re-set your deadlines without penalty. A prompt will pop up that allows you to do this. You can read about personalized deadlines here: Assignment deadlines.

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15 replies

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The worst part is the deadline is four days away. I have no idea what happens if you don’t finish a assignment in time.

Userlevel 7

Hi @AquaSwrd. You can get help in the Help Center. Here’s a good starting point: Report a problem with a course. Most courses use personalized deadlines so you can always re-set your deadlines without penalty. A prompt will pop up that allows you to do this. You can read about personalized deadlines here: Assignment deadlines.

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Im having the same issue . Did you fine a solution? Ive tried several times and 2 out of 10 are always showing incorrect when i know that i got them right

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i have been having similar issues with the ipv6 compression test, i have tested 3 times a day for all of last week, have checked my answers and know they’re correct but the test still hasn't corrected.  i’ve flagged the exam twice. i’ve copied my answers 3 times,to have as a record and have tried to get in touch with the help center but haven't been able to put in for a request for assistance, today's the last day to submit my exam, which i have taken and gotten the same results.  i was really enjoying the training and very hopeful that this would assist me in getting back to work.

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I've experienced the same problem, 1 of 10 questions is not taking the correct answer

2b06:0000:0000:1f2b:d77f:0000:0000:89ce

It's the IP in question I've tried 2b06::1f2b:d77f::89ce and 2b06:0:1f2b:d77f:0:89ce to no avail, I need this quiz to finish the course, can anyone help

Also I tried different devices and the app, chrome, I've cleared the caches, nothing works, please help

 

I contacted the chat, and I was told to try here...

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Hi @AquaSwrd. You can get help in the Help Center. Here’s a good starting point: Report a problem with a course. Most courses use personalized deadlines so you can always re-set your deadlines without penalty. A prompt will pop up that allows you to do this. You can read about personalized deadlines here: Assignment deadlines.

@Laura After reporting the problem how exactly do you move on with the course? Im experiencing the same problem now and have reported it. When exactly will I know that the issue is fixed and I can move on?

Userlevel 7

Hi @Drchrome and @joeyNeedHelp. Please check the discussion forums for this course. When the support specialist advised posting in your discussion forums, they were referring to your course discussion forums (rather than this, the general Coursera Community). 

I’m guessing there is some workaround as this is a popular course and many people are progressing in the course (i.e., passing the quiz), though I certainly understand your frustration.

I’ve shared this discussion thread with my colleague who liaises with the Google IT teaching team, so hopefully whatever is causing this issue for some people can be addressed soon.

Userlevel 1
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We can’t just keep resetting our deadlines!

This is very problematic considering with the way the quizzes are set up: You get only one wrong-you fail!

 

Isn’t it enough that we have to wait 8 house after 3 attempts?

 

 

Hi @AquaSwrd. You can get help in the Help Center. Here’s a good starting point: Report a problem with a course. Most courses use personalized deadlines so you can always re-set your deadlines without penalty. A prompt will pop up that allows you to do this. You can read about personalized deadlines here: Assignment deadlines.

@Laura After reporting the problem how exactly do you move on with the course? Im experiencing the same problem now and have reported it. When exactly will I know that the issue is fixed and I can move on?

 

Userlevel 1
Badge +2

We can’t just keep resetting our deadlines!

This is very problematic considering with the way the quizzes are set up: You get only one wrong-you fail!

 

Isn’t it enough that we have to wait 8 house after 3 attempts?

 

 

Hi @AquaSwrd. You can get help in the Help Center. Here’s a good starting point: Report a problem with a course. Most courses use personalized deadlines so you can always re-set your deadlines without penalty. A prompt will pop up that allows you to do this. You can read about personalized deadlines here: Assignment deadlines.

@Laura After reporting the problem how exactly do you move on with the course? Im experiencing the same problem now and have reported it. When exactly will I know that the issue is fixed and I can move on?

 

I meant 8 hours.

(I hate autocorrect sometimes, bu that is a different topic. ;)

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We can’t just keep resetting our deadlines!

This is very problematic considering with the way the quizzes are set up: You get only one wrong-you fail!

 

Isn’t it enough that we have to wait 8 house after 3 attempts?

 

 

Hi @AquaSwrd. You can get help in the Help Center. Here’s a good starting point: Report a problem with a course. Most courses use personalized deadlines so you can always re-set your deadlines without penalty. A prompt will pop up that allows you to do this. You can read about personalized deadlines here: Assignment deadlines.

@Laura After reporting the problem how exactly do you move on with the course? Im experiencing the same problem now and have reported it. When exactly will I know that the issue is fixed and I can move on?

 

I meant 8 hours.

(I hate autocorrect sometimes, bu that is a different topic. ;)

Hey, 

 

below is the discussion forum I joined that showed how to fix the issue.

 

https://www.coursera.org/learn/computer-networking/discussions/all/threads/2jlNTO8jRCK5TUzvI1Qi-g

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For those experiencing issues with this module, I would highly recommend using this source to double check your answers. I too was getting the answer wrong repeatedly after doing them by hand multiple times. But the issue was with the number of colons you place. (eg: putting 1 colon where you should put 2). Feel free to use the link as it works with all the questions correctly :)

https://www.countryipblocks.net/ipv6_compression.php

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Use 2 colons to fix the issue, when there are only zeros in IPV6.

 

For example:

Question: xxxx:xxxx:xxxx:0000:xxxx:xxxx:xxxx:xxxx

Answer: xxxx:xxxx:xxxx::xxxx:xxxx:xxxx:xxxx

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Hi Guys, I’ve been experiencing the same problem.

I had 3 answer that were wrong and had to answer them in this way:

 

9930:cafa:0000:0052:04cc:7b7a:0037:27e6
9930:cafa::52:4cc:7b7a:37:27e6

7d2b:00a9:a0c4:0000:a772:00fd:a523:0358
7d2b:a9:a0c4::a772:fd:a523:358

5d66:5ec9:0046:0000:2576:004f:7159:0639
5d66:5ec9:46::2576:4f:7159:639
 

Jonas.

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Hello @AquaSwrd @dareks @iluv2sing4u @reel_neel 

I guess this a technical glitch in validation tool. It can be easily rectified. I found this after going through many discussion forum threads. If your compressed form comes out with a single zero between two colons, remove it and the answer will be correct.

Example - (QS) 5d66:5ec9:0046:0000:2576:004f:7159:0639

                  (ANS) 5d66:5ec9:46:0:2576:4f:7159:639

remove the zero

              (ANS) 5d66:5ec9:46::2576:4f:7159:639

This answer will be marked as correct. The instructor never said this rule and neither any compressing tools i checked gave this answer. 

Hope this helps

Adhil

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I had the same problem but I solved it 

you just have to make your address 5d66:5ec9:0046:0000:2576:004f:7159:0639

5d66:5ec9:46::2576:4f:7159:639

but the zero can be written like that only for the 4 first part

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