Having troubles grasping subneting.

[Iccy (temp)]

Anyone knowledgeable?

I understand the classes and the first octate/decimal identifier. But breaking down the subnetting i just can seem to grasp. I need to understand the methods of calculating a availible ip range within a subnet. Like in a ip of 203.192.53.0. I cant seem to figure out the equations.

Can anyone help, this is driving me nuts.

[duffman91]

What exactly do you not understand? Do you know how to get started? Have you checked google? The topic is heavily covered in all kinds of websites.

http://ou800doc.caldera.com/en/NET_tcpi ... uters.html

[R00k]

Have you studied ANDing yet? That explains it all at a very basic level.

You can also download SolarWinds Subnet Calculator to help you understand and test with.

Aside from that, can you be a little more specific?

[plained]

well first wipe the grease off your mits

then start out all soothie like as to get it all calmed , then coax it all clser with nice sounds, then grab -on real fast

ok

[tnf]

yea bitwise ands.

[Tormentius]

These are all decent tutorials:

http://www.cramsession.com/articles/fil ... 3-1022.asp

http://www.learntosubnet.com/

http://support.microsoft.com/?id=164015

http://www.gtoal.com/subnet.html

[bork[e]]

http://www.learntosubnet.com/

If you look at any, check this one out. very nice imo.

[andyman]

just try to think 'a net within a net' and you'll be fine

[+JuggerNaut+]

just try to think 'a net within a net' and you'll be fine

ffs

[Iccy (temp)]

Well to start i was really lost cause iin the online stuff they wrote exponential numbers like this . 2x -2 = subnet. Basicly it made me try to figure out how 23 - 2 = 6 lol. Yea i was lost.

Now i been pouring over a cisco book, the sybex book, the learning to subnet site and another tutorial i found. So far this one makes the most sense to me.

http://www.pantz.org/networking/tcpip/subnetchart.shtml


Basicly i undestand the 3 classes, a/b/c. I understand the binary translation of a 8 bit or 1 byte network address. Where im getting stuck is understanding and implimenting the calculations needed to figure out the number of networks i can subnet.


ok, 198.132.123.34.

How do i figure out what available for this. This is what i know so far.


being a ip thats 192+ this puts it into class c which means that our binary data is in the 34 since the class C configuration is net.net.net.node.

now the 32 needs to be broke to binary right? If this is true then the binary subnet if im not mistaken is 11111111.11111111.11111111.00100010


Ok now im losing it. I know that 2x - 2 = the subnet. x = the number of bits used.

So if x = bits then the bits = 2, so 2x2 = 4 - 2 = 2, so i have 2 subnets available?

If so then 2 equates to 128+64 = 192.

So 198.132.123.34 = 198.132.123.34/192




Am i even close so far?

[Iccy (temp)]

Have you studied ANDing yet? That explains it all at a very basic level.

You can also download SolarWinds Subnet Calculator to help you understand and test with.

Aside from that, can you be a little more specific?

I dont know what anding is so ill say no.


Does my post above help clarify my difficulties?

[R00k]

I typed a long post here, but it's been so long since I've worked with nuts and bolts of subnetting I was afraid I'd tell you wrong.

This, sir, is all you need:

http://www.ralphb.net/IPSubnet/

If you have a hard time understanding after reading that, come back and ask some specific questions.