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Subnetting:

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by freemindneo

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I'm currently trying to pass my Net+ Certification exam. On one of the practice exam quetions I was completely stumped! PLEASE ... HELP!
The question reads:
A network has been assigned the IP address 201.180.150.0, it will be subnetted and it will have a minimum of 120 hosts on the whole network.
What is the maximum number of hosts possible on the whole network?

I did eventually find out the what the right answer was, but what I really need to know is EXACTLY to determine the right way to find out the maximum number of hosts possible for any IP address with ANY variant of minimum host, etc.
Thank you VERY much for your help!

6 replies

by oldefar

In case you don't have a Cisco router to do your calculations -

Class Network Range MSB
A 1.0.0.0 thru 127.0.0.0 0xxx xxxx
B 128.1.0.0 thru 191.255.0.0 10xx xxxx
C 192.1.1.0 thru 223.255.255.0 110x xxxx

Class Network Mask(Default) BinaryNetwork Host
A 255.0.0.0 1111 1111 0000 0000 0000 0000 0000 0000
B 255.255.0.0 1111 1111 1111 1111 0000 0000 0000 0000
C 255.255.255.0 1111 1111 1111 1111 1111 1111 0000 0000

by zen11453

A year later, I'm hoping you found the answer to your question. You haven't got back to anyone here who answered which is a bit rude considering they've taken the time out to reply ! are you just a leech ! anyway, the answer is 126 if i'm not mistaken.

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