Re: subnetting (helps security)


"new guy" <new guy@xxxxxxxxxxxxx> wrote in message
news:aP2bg.173153$7a.104097@xxxxxxxxxxx

I am studying subnetting and I have a few question, if you do not mind.

1. why will the network number be 0 if we borrow just 1 bit?

Ok, I guess I have to expand on my questions, but if you do not have
anything nice to say, please do not reply to my post at all.

I will take as an example the network address, 192.168.1.0 The default
subnet mask is 255.255.255.0
The host addresses will be 192.168.1.1 up to 192.168.1. 254 where
192.168.1.255 is the broadcast.

If I borrow 1 bit (subnet mask 255.255.128.0) the result is:
126 usable hosts: 192.168.1.1 to 126; and 2 subnets as follows:
Subnetwork ID broadcast ID
192.168.1.0 192.168.1.127
192.168.1.128 192.168.1.255

The ID of the first Subnetwork (0) is the same as the original network and
the broadcast ID of the second subnetwork (1) is the same as the broadcast
of the original network. However, I am missing something simple ( as it's
always the case:) and hoped somebody would give me at least a hint.

new guy :)



.

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