I used this every day and got really good at subnetting, i could even do the Hex masks in my head after a while...

http://www.kehlet.cx/docs/2004/03/subnet.php

Need to learn the slash notation though. Anyone know of a good way to do this? or do i just memorise them all?

i never really found a good way to memorize them. i work with this stuff daily though so it didnt take long to memorize just based on repeated exposure.

Hi All,

I found this link really good.
You have to pay about $5 to download the pdf but I thought it was well worth it.

http://www.easysubnet.com/

Thanks for that link- that looks very helpful. I've made a spreadsheet in Google Docs for slash /CIDR practice. If you're interested I've attached the xls export. I've been using a Google spreadsheet to practice decimal to binary (and vice versa) and it has been very helpful. HTH

Hi! I can't seem to find any info regarding subnets lower than /8 (e.g. 254.0.0.0 aka CIDR /7).

How do we resolve these types of subnets? Say given a host IP address, how do we get the network and broadcast address if the subnet is a /7 or lower?

Thanks in advance!

no one really uses those but it's the same concept. do the same thing you do to get from a /16 to a /15, only make it a /8 to a /7.

Subnet practice, saw this link recently somewhere not sure where, apologies if repost.

http://faculty.valleycollege.net/rpowell/jscript/subnet2.htm

Where can i get subnetting problems to practice along with their solution.

Thanks ,
Sujith John

http://www.subnettingquestions.com/

and

hehe

Peace,
Dan

_________________
format and reinstall, the way of the pussy.

Thanks Alot Dan !!

One more query !!

Can you explain a problem : an easy method this can be solved.
==================================================
What is the last valid host on the subnetwork 192.168.109.88/29?

==================================================

Thanks ,
SUjith JOhn

look at it this way...

Subnet Address---First Host Address---Last Host Address---Broadcast Address

Solve for any subnet, in that order, over and over and over and over, NO matter what the questions asks, solve for those addresses based on whatever subnet mask it is, in that order Every Time...

And you will get every single one of those questions correct, every time. I guarantee it.

As for how to get there, there are a million ways... I see it as 3 bits short of /32, hence 2^3 = 8 which means groups of 8... etc Some peeps convert to dotted decimal... etc etc

Peace,
Dan

_________________
format and reinstall, the way of the pussy.

Thanks once again !! I'll start working on this.

THANKS everyone for all this helpful links...I need ti master all this sub netting staff soon

for a PDF called "IP Addressing and Subnetting Workbook". It helped me to understand a lot, with some tutorials when I started to study this.

http://pdfmenot.com/view/http://www.uni ... rkbook.pdf

Just a little tid bit that helps me out when working with subnets by hand, your networks and hosts per network are inverse to each other, when one doubles, the other one gets cut in half, and vice versa.

Thanks for this....its awesome!