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Re: HOWTO: Understand Binary and Subnetting
by Lou M on Monday June 17, @02:46PM
This is an excellent explanation of a subject that confounds many new and novice Sys Admins. What I am wondering about though is:

The host addresses will fall between the network numbers, so we will have 30 hosts per network. You're probably wondering why it's not 31? The answer is that the last address of each subnet is used as the broadcast address for that subnet.

So if I understand this correctly by creating a subnet mask of 255.255.255.224 I haven't limited myself to 32 IP adresses (which is what I always thought.)

So what have I done? I have created several 30 IP networks?

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    Re: HOWTO: Understand Binary and Subnetting
    by Jason on Monday June 17, @05:06PM
    Yes, six of them in your example. Here are the six network numbers you get from a class-c subnet mask of 255.255.255.224. The first three octets are arbitrary and could be any valid class-c address.

    192.168.1.32
    192.168.1.64
    192.168.1.96
    192.168.1.128
    192.168.1.160
    192.168.1.192
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    • Re: HOWTO: Understand Binary and Subnetting
      by sib on Tuesday March 18, @02:19PM
      so this means that for class A I srart with 8 and class b with 16 i see here that for a class c address u started off by 32
      [ Reply to this ]
    Re: HOWTO: Understand Binary and Subnetting
    by gene on Tuesday October 04, @06:06PM
    I'm just learning this stuff but I believe you have created 6 subnetworks with 30 usable addresses apiece:33-62,65-94,97-126,129-148,151-180,183-213.This gives you 180 usable numbers instead of the 254 not subnetting would give you.
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