Subnetting Cisco CCNA -Part 5 The Magic Number

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  • Опубліковано 24 гру 2024

КОМЕНТАРІ • 68

  • @shardagovender4465
    @shardagovender4465 3 роки тому +2

    I have watched so many UA-cam explanations, I finally experienced the AHA moment.

  • @samantha8178
    @samantha8178 5 років тому +3

    Excellent videos. I've been in class for days with my eyes crossing and my brain melting. You are explaining it in a simple way I can understand. My instructor was all over the place making it way more complicated than necessary.

    • @ivanpiro999
      @ivanpiro999 5 років тому

      this "magic number" thing sure helps a lot, I'm starting to digest it and finally connecting the dots! or should I say.. _connetting the nets_ ? HAHA

  • @holychewbacca
    @holychewbacca 11 років тому +1

    Lights are going off all over my brain. So this is subnetting!? I don't wish to speak ill of others but I am being pushed to learn CCNA on my own and you have made subnetting much easier than people said it was. Thank you. Have all of the likes!

  • @kevinb6546
    @kevinb6546 7 років тому +2

    This entire series on subnetting is ridiculously good man, keep it up, thanks a ton.

  • @brianabbott2418
    @brianabbott2418 5 років тому

    I just did 40 minutes of cardio on a bike while watching your videos. I understand the material a lot better. Thanks dude.

  • @dustblaaze
    @dustblaaze 12 років тому

    im amazed by this channel and video. just subscribed because you explain it better in 45 minutes than my professor did in my class

  • @alfatourist
    @alfatourist 14 років тому

    Thank you Dan. You make complex things look easy with your teaching.

  • @Smuds
    @Smuds 12 років тому +1

    great lessons. I've been waiting for the light to go off in my head, and the magic number method did that for me. However, I'm having trouble applying this to Class B networks, with a CIDR of /22 or /23 for example. Do you mind showing an example like this? It would be the missing piece to my puzzle

  • @kidroys
    @kidroys 12 років тому

    great tutorial, understood the whole subnetting after looking ur videos, great job

  • @jontyadams8573
    @jontyadams8573 11 років тому

    Great work!! I've been struggling with subnetting for a while now, you really helped me...from now on I only follow your posts :-)

  • @RemixPicture
    @RemixPicture 13 років тому

    Yay, I knew the answer before you started explaining. :P
    Great tutorial man, part 6 here I come!

  • @vincentlivera2948
    @vincentlivera2948 6 років тому

    you are a great teacher. well done Dan

  • @niharikagangahar2794
    @niharikagangahar2794 8 років тому +1

    I am confused why other subnet masks not considered? Its only 192 one?

  • @thom8448
    @thom8448 11 років тому

    Great set of videos. Thanks.
    Only thing i would say is you need to mention earlier the "Useable hosts" is two less than magic number, if people only watched the first couple of vids they could trot off with erroneous info. Cheers
    Keep em coming

  • @osvaldoposta9072
    @osvaldoposta9072 5 років тому

    Best subnetting tutorials. Thanks a lot man

  • @naliali
    @naliali 9 років тому

    Dan thank you for these video regarding majic numbers, I do have one question , all your example are in class C, what is the mask for in class B , like /22 , then how do to do the majic #...

  • @ScottFinnell
    @ScottFinnell 13 років тому

    Thank you for your video, Can you use the magic number to find the first and last valid host, or do a video on this. I am having a very hard time with it, and I can't find anything on it.

  • @kwanzanator
    @kwanzanator 11 років тому

    Awesome video! You just made subnetting so much easier!

  • @ScottFinnell
    @ScottFinnell 13 років тому

    Does this only work with masks in the last octet? I am doing a problem where I need to find, "which subnet does host 178.16.20.208 belong to. I don't get the right answer when I use your formula. Please advise.

  • @danscourses
    @danscourses  12 років тому

    see my CCNA1 playlist on my youtube channel and look for my class A and class B subnetting tutorials :)

  • @abhishek_m89
    @abhishek_m89 9 років тому

    Your tutorials are awesome man.!
    It made me answer confidently in my interview. Thanks

  • @BortolanAlexandre
    @BortolanAlexandre 8 років тому +1

    Now, the "minimum" answer here is B, but in a "real world" situation would that be a good idea? what if i need to add computers to the faculty network, wouldn't i be screwed then?

    • @microprocessclockspeed1501
      @microprocessclockspeed1501 8 років тому +1

      +Alexandre Bortolan In such as case then you wold use Variable Length Subnet Mask (VLSM). This would help for scalability of your network. Just check Cisco topic on VLSM it will help.

  • @singhgurpreet2040
    @singhgurpreet2040 9 років тому +1

    what if you don't want to "waste" ip address? i mean media and library can easily fit in 1 subnet (12+22

  • @gensoumusic9882
    @gensoumusic9882 9 років тому

    In a real life environment, you would want to go with 128/126 usable hosts since there is room for expansion correct? IF you go with 64 IRL you will rin out if you need more IP's. Correct me if im wrong?

  • @5h4m0n3
    @5h4m0n3 12 років тому

    It is now way easier than it was. Thanks.

  • @necipbattal1126
    @necipbattal1126 5 років тому

    what is magic number? Still not understand ! is it assuming a number?

  • @joedarvish70
    @joedarvish70 10 років тому

    This is contradictory to your previous video #4. There you had Teachers and admins and you created one network. Here you are creating 4 network?

    • @sethsiedna2541
      @sethsiedna2541 10 років тому +2

      In the previous video he created a /25 network because the Teacher's network required 120 hosts and only two networks were required, in this example the Faculty's network (being the largest group) required 60 hosts and a total of four networks were required. A /26 would give four networks of 64 each but of course the first and last of each "sub-network" is reserved and can't be used by a host. So the sub-networks would have 62 usable hosts each whether they needed that many or not.

  • @Pho3nixbeyond
    @Pho3nixbeyond 8 років тому

    thanks for the video! you made it so much simpler than at the academy!

  • @fmartinez004
    @fmartinez004 3 роки тому +1

    I can figure this out now in my mind without even jotting down 0s and 1s, 192 gives you 4 networks and the mn is 64 blocks and no of hosts - 2

  • @sarahchua2811
    @sarahchua2811 5 років тому

    Any idea when to stop counting the networks? I mean he stopped at 192 and it goes like this 0,64,128,192 how will you know when to stop ate 192? Sometimes i stop at 256. Hope someone can help. Thanks

    • @danscourses
      @danscourses  5 років тому

      Hi Sarah. If you have gone to 256 you have gone too far. The highest number for 8 bits is 255

    • @sarahchua2811
      @sarahchua2811 5 років тому

      @@danscourses oh thank you for your reply Dan. But how can I know when to stop counting the networks? Like in this video you stop at 192 , shouldn't it be always at 255? I really learned a lot from your video tutorial thanks again.

    • @mangimusa3175
      @mangimusa3175 5 років тому

      @@sarahchua2811 you need to know first how subnets you have to create, eg. in this example there were only 4 subnets to be created, so this made him to stop at 192, because if you count from subnet 1 which is 0 to subnet 4 which is 192,, there are only 4subnets. ie 0,64, 128,192

    • @sarahchua2811
      @sarahchua2811 5 років тому

      mangi Musa Oh I got it!!! Thank you so much for your help. 👍👍👍

  • @ndiguide
    @ndiguide 5 років тому

    Thanks a lot , your videos are excellent and very well explained ,this really helped me !

  • @انامسلموكفى
    @انامسلموكفى 2 роки тому

    4 networks means 2 bits coz 2 ² is 4 then 2 bits from host to network will giv us 24+2 =26 thts mean 192 just 2 bits get one(1 value )

  • @samimahammed6241
    @samimahammed6241 10 років тому +1

    how he got usable host 62

  • @andresgonzalezmadrigal5902
    @andresgonzalezmadrigal5902 4 роки тому

    Last part of the video is way easier to me with the subnet table... Like you just go and check that /26 has 64 IPS and 62 usables.
    You have to learn it but is easy

  • @obs54
    @obs54 11 років тому +1

    thanks alot man this is an amazing tutorial i understand it so much more.. :)

  • @pamelabute3992
    @pamelabute3992 5 років тому

    so helpful for a last minute revision

  • @cortarelva
    @cortarelva 8 років тому

    I got carried away and did the exercise using vlsm. Flsm wastes a lot of IP addresses.

  • @mohamedzubiar7045
    @mohamedzubiar7045 12 років тому +2

    god showed me this channel

  • @masudimusonda5748
    @masudimusonda5748 6 років тому +1

    awesome simplified and well explained

  • @achangezi
    @achangezi 10 років тому

    That was awesome man. I learned a lot. Thanks

  • @shakirmohammed7890
    @shakirmohammed7890 11 років тому

    Thanks its very simple and easy to understand

  • @naliali
    @naliali 9 років тому

    Nevermind I found your class B... Many thanks

  • @gameshhh5646
    @gameshhh5646 3 роки тому

    YOU ARE AMAZING BRO

  • @banditlegal7452
    @banditlegal7452 Рік тому

    I can get the magic number 3:37 by pick the highest number of hosts in the biggest network

  • @slayer515O
    @slayer515O 5 років тому

    Hello Dan,
    Thank you very much. I know have moved past my road block in IPV4.
    Best,
    Rt

  • @raidakram-uk1ds
    @raidakram-uk1ds 7 місяців тому

    Thank so much ❤

  • @jibnathgautamhy1280
    @jibnathgautamhy1280 4 роки тому

    Greatwork

  • @morganbargeron1179
    @morganbargeron1179 8 років тому

    Holy crap thank you! This helped so much!

  • @pedrogsantamaria5271
    @pedrogsantamaria5271 2 роки тому

    Thanks 😊

  • @bteambrian5055
    @bteambrian5055 6 років тому

    thanks buddy.....that was simplified

  • @TROOP3RAK47
    @TROOP3RAK47 7 років тому +1

    Many thanks!

  • @wojciechniznam9255
    @wojciechniznam9255 10 років тому

    I can solve this in less then 10 sec:)!
    Maybe I will do some tutorial one day? Anyway, thank you:)

  • @EhhGala
    @EhhGala 7 років тому

    LEGEND Thanks brooo

  • @kcdara18
    @kcdara18 11 років тому

    Orkun

  • @GaroCARP
    @GaroCARP 12 років тому

    255.255.255.0

  • @ScottFinnell
    @ScottFinnell 13 років тому

    Does this only work with masks in the last octet? I am doing a problem where I need to find, "which subnet does host 178.16.20.208 belong to. I don't get the right answer when I use your formula. Please advise.