How to calculate a TCPIP IPv4 subnet mask

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Uploaded by on Jan 24, 2010

Computer training for calculating a TCPIP IPv4 subnet mask.

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Education

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  • likes, 5 dislikes

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Uploader Comments (2arprodlim3)

  • What if you have an Ip of 156.60.x.x and you have 5 bits,6 subnets,9 host?

  • @anuthehigh

    If you start with a IPv4 Class B address then you are borrowing from the third octet. Your increment is in the third octet. First address usable address range would be 156.60.32.1 through 156.60.63.254

  • Thanks alot , your video helped me a tone, I hope you upload more videos soon

    Keep up the great work

  • @blackstorm5000

    Actually I have some stuff I want to do but my video guy is working on the sequel to the Adventures of IT Super Heros and I have to wait till that is done ..

  • You must count over three bits from the left, not from the right or just randomly choose a spot?

    Didn't know that the eight 1's represented those numbers; i.e. 128, 64, etc...I don't see why 32 holds so much importance and why use it to calculate range of network addresses. Seems so arbitrary.

    Phew, hopefully I can find a competent book to explain more of the basics, there are so many bad vague esoteric books on subjects like these.

  • @Markohoppis

    Going from decimal to binary is a bit strange at first. Maybe I should make a video about that. Decimal 1 and binary 1 are the same. Decimal 2 is binary 10. Decimal 3 is binary 11. Decimal 4 is binary 100 ...

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All Comments (68)

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  • great it helped a lot.thank u.

  • thank you

  • wow you made this easy. thanks

  • Thank you for the explanation. I never quite got the grasp of working out subnet masks before.

  • omg my teacher explained this to us in a different languege i think. thankyou so much now i understand it.!!! :) (ihave a ccna exam next week, wish my luck :3)

  • Thanks a lot this was really helpful

  • Thanks a lot this was really helpful

  • This lady explained subnetting the way I needed to hear it. Awesome job madam!

  • Finally I found this video which has really helped me understand subnetting! Thank you!

  • Why Would You Dislike This Video LOL .. 4 Dislikes? 4 Retarded People =\

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