Léa LOPEZ

Léa LOPEZ, Telecom System Administrator, Ambala College of Engineering and Applied Research, Ambala (INDIA)

25 thoughts on “CCNA 3 Chapter 2

  • August 5, 2021 at 8:50 am
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    Cheers, it was very useful, just a small mistake in Catalyst 2960 default configuration explanation. It places the link on hold if it doesn't receive any for 6 BPDUs not 6 seconds. It means 6*2=12 seconds.

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  • August 5, 2021 at 8:50 am
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    I understand that you did not upload lectures on CCNA1, but could you point me to a channel that has, but with the quality that you've performed with in this playlist?
    CCNA builds off of previous lessons and sometimes I forget certain things. It would be nice to have access to a good refresher like this.

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  • August 5, 2021 at 8:50 am
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    Thank you so much! I am in my 3rd out of 4 CCNA classes. My instructor flies through the PowerPoints, and then tells me that I should already know the answers to any questions I ask in class. As you can imagine, his responses are of absolutely NO help to me! However, your videos have been extremely valuable to me, and you explain the material in a way that I can understand. Thank you again, and I will be searching for other videos of yours as I continue my journey with learning networking.

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  • August 5, 2021 at 8:50 am
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    Yeah as the others say, youre a true hero Johnny mac thanks for taking youre time doing these videos they get me through so much easier im really bad at reading 300 pages of small line words this is helping me Alot.

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  • August 5, 2021 at 8:50 am
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    currently doing this at uni and your supplementary explanation of topics really helps me consolidate my understanding – thanks so much for the uploads, what else do you teach in info tech field?

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  • August 5, 2021 at 8:50 am
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    Hello Jonny Mac, Is there a reason chapter 1 is not being treated? Sorry for my english i don't know the correct word im looking for.
    Greetings.
    IOCTOPUSI

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  • August 5, 2021 at 8:50 am
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    Johnny Mac- I cant thank you enough for all the time you spend making these videos. You do an excellent job in condensing these chapters to focus on the most pertinent information. Well done!

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  • August 5, 2021 at 8:50 am
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    These Videos are helping me to pass a 20% exam for my BSC
    Thanks man, you describe it better than most!

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  • August 5, 2021 at 8:50 am
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    The reason why the BID increments by 4,069 is because 16 bits are used to identify the extended system ID and bridge priority, in the BID, where it used to be the whole 16 bits for just the bridge priority and the extended system ID didn't used to exist, I believe. Now the bridge priority uses the 4 bits at the left end of the binary code, while the extended system ID uses 12 bits:

    2 Bytes
    ———————————
    4 bits 12 bits
    —– ————————
    0001 000000000000 = 4,096 (2^13)

    1111 000000000000 = 61,440 (2^16)

    Which is why the range is 0 – 61,440, too. There's another 48 bits, which are recognised as separate code, that make up the BID, which is the MAC address.

    It is useless to know, but that is why.

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  • August 5, 2021 at 8:50 am
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    Ty for these courses, they are imo the best you can find on the internet!

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