Hi Andy,

On Tue, May 19, 2009 at 3:32 PM, Andy Goldschmidt <
[email protected]> wrote:

>  In this topic :
> 109.1  Demonstrate an understanding of network masks
>
> Does that mean we need to know what a class A, B and C network is ?
>     e.g. Class C is 255.255.255.0 or /24
>
> Should we know that in CIDR /25 equals to  netmask 255.255.255.128 ?
>
>
> Do we need to be able to work out the Network Address if we are given the
> IP and Netmask ?
> What about working out the Broadcast address ?
>    The above involves converting to binary and then doing addition etc to
> work out the answer.
>

I would say yes to all the question. Those are quite common tasks for a
network administrator. You can also add: find the number of IP available for
a given mask.

Note:  255.255.255.0 or /24 does not imply class C, you have to check the
first bit(s) of the IP to know the class.

Regards,
Benjamin
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