+ Reply to Thread
Results 1 to 3 of 3

Thread: Help !

  1. Junior Member Registered Member
    Join Date
    Dec 2014
    Posts
    1
    #1

    Default Help !

    Help! i doesn't know how to do this question.
    192.168.25.0 , approximately 55 nodes per subnet. How i know the number of hosts per subnet?
    Reply With Quote Quote  

  2. SS -->
  3. Senior Member
    Join Date
    Oct 2013
    Location
    Denver, CO
    Posts
    2,325

    Certifications
    MS: Information Security, CISSP, GCIH, CEH, CHFI, CCNA: S, CCNA: R&S, VCP6-DTM, Linux+, Project+, VCA6-DCV
    #2
    So you know that your bit increments are 1, 2, 4, 8, 16, 32, 64, 128. There are 8 bits in each octet representing the former numbers. The subnet has to be in increments of one of those numbers, so which we would use? 32 and anything under is too small, 128 is too large, so we'd use a 64 bit increment.

    Assuming your subnet mask for 192.168.25.0 is 255.255.255.0 you would use the first two bits in that last octet. 128+64 = 192. So your subnet mask would be 255.255.255.192. Your first subnet would look like

    192.168.25.0 - 192.168.25.63
    192.168.25.64 - 192.168.25.127
    etc.

    This would allow for 62 hosts per subnet (64 minus two because one is your network and one is your broadcast).
    Reply With Quote Quote  

  4. Member
    Join Date
    Nov 2014
    Location
    Ontario, Canada
    Posts
    83

    Certifications
    Network +
    #3
    x+y = 8
    2^y-2 = 55 therfore 2^y>57
    in this situation the answer for Y is 6, 2^6 = 64 and the number for subnets would be 2^x, therefor the subnets are 2^2 = 4
    Reply With Quote Quote  

+ Reply to Thread

Social Networking & Bookmarks