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I was given a question. A company needs 3 networks. Given IP address is 176.0.0.0

Network A: 300 hosts

Network B: 5 hosts

Network C: 75 hosts

So Network A should be having a subnet of /23 and therefore having maximum assignable IP addresses of 510. So there would be a wastage of 210 hosts since 510-300=210.

My question is can I use those 210 IP addresses for Network B and Network C?

Thanks.

Community
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Boon
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1 Answers1

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Off topic, but I'll answer anyway.

No. Any assigned network space can only be used by that network.

The only way to use the "wasted" addresses for networks B and C would be to split network A into two or more smaller networks that only use the part of the /23 space that they really need. That goes against the requirements in the original question, though.

Andrew Cooper
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  • Thanks. That means those 210 unassigned IP addresses can only be used by Network A for future additional devices, right? – Boon Apr 02 '13 at 05:06