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Question about calculating network,host and broadcast address's

I would like to say i am new to this forum and I do not know if this is the right place to post this but i am currently in a cisco academy for CCNA and if anyone else is in this class i am stuck @ 6.2.2 in the online cisco material.....

given the following address/prefix of

enter the last octet in binary of the network,

I am totally lost @ how to find the network octet i know /30 means the first 30bits are network and the last 2 are host i also know the last octet is 10101100 or 172

my question how do you get .174 to .172??? if you are wondering how i know the answer --it is in the book i just dont know how to do it on my own :)

thanks much

Cisco Employee

Re: Question about calculating network,host and broadcast addres

A good place to start would be to go through the whitepaper link below.

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