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CN | Flow Control Methods | CSMA/CD | Ravindrababu Ravula | Free GATE CS Classes

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by Ravindrababu Ravula

simple network management protocol

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34 thoughts on “CN | Flow Control Methods | CSMA/CD | Ravindrababu Ravula | Free GATE CS Classes”

  • hey! can anyone tell me that in case a station is checking if the link/medium is free or not and it is doing so by sending some dummy data/package? would that not corrupt the data if another station was sending data and for that station would that be considered a collision?
    Thanks in advance.

  • Is it compulsory to know the proof of efficiency in ETHERNET coming to GATE point of view?

  • Thank you so much. I have been referring your videos for my exams. It's helping me a lot to understand easily 🙂

  • Hello sir,
    You explained efficiency of CSMA/CD, Here In every collision we will waste Tt+2*Tp time but you added only 2*Tp for the contention because in every collision it will also waste Tt.

  • Carrier Sense means "Listen to the media, is another device transmitting? Yes = a carrier has been sensed, wait until transmission has finished. If the answer was NO, then transmit data". Devices do not transmit a carrier signal to test the media before transmitting data.

  • Sir i agree with the condition Tt>2Tp, but i have a doubt, you had said A will detect collision only when it is transmitting the packet so in this condition Tt<Tp if collision occurs by B then A think that packet is successfully transmitted…

  • God Bless you, Thank you so much for everything my lectures dont have any intuition behind things unlike yours which is full of it. This is exactly the way I wish everyone taught

  • Its Geometric distribution not Poisson and expected value of geometric distribution is 1/p

  • Tp – time taken for the last bit of the packet to reach the destination.
    Tt – time take for putting the packet into communication medium.

    Then, how Tt >= 2*Tp is possible. Because, unless the packet is completely transmitted, we can't send the last bit to the reciever.

  • sir Tp time is for transmitting the last bit of the packet to the destination. then why did you say "first bit" in the 3rd example where Tt>=2*Tp ??

  • Thank you Sir always search for your lecture whenever i get confused in books whether these are parsers or nertwork protocols .Thank you

  • Until you get the first head is geometrically distributed.

  • I remembered the song "Aaj exactly 10 am mera break up ho gaya" …jokes apart .. Awesome lecture you are god to us

  • Sir, suppose we have another station E after station D. when station A has completely transmitted the data but the last bit of data is still in the cable. Now station E senes that the carrier is free at its point of contact and sends data to station A. Now, if the last bit of data from A and data from E collides, how will the station A know that the collision has occurred?

  • Small doubt p=1/e. Means one successful transfer in e attempts. So no of collisions are e-1 .isn't my approach correct sir?.. an excellent video sir. A standing ovation by my side sir.

  • Useful time is t.t not t.t+tp why?? I mean why we are not considering propagation time also as useful time ?

  • love your work , <3 . But could you add more engsub on your videos . many thanks

  • The toll gate example is tooooooooooo gooooooood .
    Add this type of examples in every future videos .

  • Thank you..sir for this tutorials..can you please include the tutorials for each layers in iso/osi model design issues in Computer networks

  • why the vulnerable time in ALOHA depends on the frame transmission time (Tfr), but in CSMA it depends on frame propagation time (Tp)?

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