Re: [aclug-L] Subnet Mask Problem

[John Goerzen <jgoerzen@xxxxxxxxxxxx>]

There's an easier way.

There is a network 10.*.*.* that is one of these ones that is
guaranteed never to be used.

You can say something like this:

10.0.subnet.host

Let's say you have, then, 10.0.5.100.  Your subnet is 5 and the host
is 100.

Your fully-qualified netmask, then, is 10.0.5.0/255.255.255.0.

The first number is the network base address, and the second one is
the netmask.

If you really don't need to segment up your network into separate
subnets (you probably don't if you're just running at home), just grab 
10.*.*.*:

10.0.0.0/255.0.0.0

and start allocating numbers from in there however you like.

John

"tkwo" <tkwo@xxxxxxxxxxxxxx> writes:

>       I try to figure out a subnet mask question, I hope someone can help
> me. Thanks.
> I have a subnet mask 255.255.255.192, and I can have 4 subnets and 64 hosts
> in each subnet according to the book. The question I couldn't figure is how
> can I assign the subnet and host number to each machine. For example. I
> have 4 possible subnets, and 64 hosts using the subnet mask metioned above.
> I use Class C, and they are
> 
>        192.168.#subnets.#hosts
>         
>         1) Do I have to give #subnet number from 1 to 4 OR I can choose any
> numbers from 0 to 255 and                         then make up total 4
> subnets?    
>         2) I have the similar question on #hosts. Can I choose any numbers
> from 0 to 255 and then make             up total 64 host except the 255
> number I can not choose? Is there any except number from 0 to              
>            255 I have to pay attention on it? After exception, how many
> possible hosts on each subnet? I             eagerly know the answer.
> 
> Thank again.
> 
> Kong Wo
> e-mail: tkwo@xxxxxxxxxxxxxx
> 
>            
>        
>        
>        
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-- 
John Goerzen   Linux, Unix consulting & programming   jgoerzen@xxxxxxxxxxxx |
Developer, Debian GNU/Linux (Free powerful OS upgrade)       www.debian.org |
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