Learn subnetting at http://easysubnet.com

yoda9999

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Jan 23, 2008, 5:38:41 AM1/23/08

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Learn and practice subnetting online:

http://www.easysubnet.com/
http://www.subnettingquestions.com/custom/bren/

Sam Wilson

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Jan 23, 2008, 6:28:31 AM1/23/08

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In article
<e6e87324-0c34-44c7...@d21g2000prf.googlegroups.com>,
yoda9999 <bcho...@gmail.com> wrote:

> Learn and practice subnetting online:
>
> http://www.easysubnet.com/

$3.99 for an e-book with stuff you can find for free on the web (it
could be worth it to save you the searching). Sample contents list
shows lots of obsolete stuff about classful networking - NOT a good plan
to learn that.

> http://www.subnettingquestions.com/custom/bren/

First sample question it gave me was:

Question: How many subnets and hosts can you get from the network
133.117.0.0 255.255.255.0?

The correct answer to that is between 1 subnet with 254 hosts and 64
subnets with 2 hosts. The answer given was:

Answer: 256 subnets and 254 hosts

Which is wrong. That's the answer to the question "How many subnets
with mask 255.255.255.0 can you get from a network with mask
255.255.0.0, and how many hosts are on each?" or "How many /24 subnets
can you get from a /16 prefix, and how many available host addresses are
there in a /24 prefix?".

Sam

Neil Cherry

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Jan 23, 2008, 10:28:00 PM1/23/08

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On Wed, 23 Jan 2008 11:28:31 +0000, Sam Wilson wrote:
> In article
><e6e87324-0c34-44c7...@d21g2000prf.googlegroups.com>,
> yoda9999 <bcho...@gmail.com> wrote:

> First sample question it gave me was:
>
> Question: How many subnets and hosts can you get from the network
> 133.117.0.0 255.255.255.0?
>
> The correct answer to that is between 1 subnet with 254 hosts and 64
> subnets with 2 hosts. The answer given was:
>
> Answer: 256 subnets and 254 hosts

Yipes!

> Which is wrong. That's the answer to the question "How many subnets
> with mask 255.255.255.0 can you get from a network with mask
> 255.255.0.0, and how many hosts are on each?" or "How many /24 subnets
> can you get from a /16 prefix, and how many available host addresses are
> there in a /24 prefix?".

Since this is the Cisco newsgroup it could be 254 subnets each with 1
host. ;-)

--
Linux Home Automation Neil Cherry nch...@linuxha.com
http://www.linuxha.com/ Main site
http://linuxha.blogspot.com/ My HA Blog
Author of: Linux Smart Homes For Dummies

X-Eliminator

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Jan 25, 2008, 8:53:11 PM1/25/08

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Or you can go here for free:
http://www.3com.com/other/pdfs/infra/corpinfo/en_US/501302.pdf

On Wed, 23 Jan 2008 11:28:31 +0000, Sam Wilson <Sam.W...@ed.ac.uk>
wrote:

Sam Wilson

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Jan 28, 2008, 9:56:02 AM1/28/08

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In article <dj4lp3dis9hub56q6...@4ax.com>,
X-Eliminator <blab...@aohell.com> wrote:

> On Wed, 23 Jan 2008 11:28:31 +0000, Sam Wilson <Sam.W...@ed.ac.uk>
> wrote:
>
> >In article
> ><e6e87324-0c34-44c7...@d21g2000prf.googlegroups.com>,
> > yoda9999 <bcho...@gmail.com> wrote:
> >
> >> Learn and practice subnetting online:
> >>
> >> http://www.easysubnet.com/
> >
> >$3.99 for an e-book with stuff you can find for free on the web (it
> >could be worth it to save you the searching). Sample contents list
> >shows lots of obsolete stuff about classful networking - NOT a good plan
> >to learn that.
>
> Or you can go here for free:
> http://www.3com.com/other/pdfs/infra/corpinfo/en_US/501302.pdf

Yes indeed - that's some of the free stuff!

(3Com used to have a very good short description of subnet masking but I
lost track of it - looks like they've expanded their offering.)

Sam