Relation between port and IP address

Posted by httpinterpret on Stack Overflow See other posts from Stack Overflow or by httpinterpret
Published on 2010-05-30T07:03:19Z Indexed on 2010/05/30 7:12 UTC
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port

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ip

My question is, if machine A have two IP address X,Y.

Can it open port 80 twice,like X:80 and Y:80 ?

Say,is port unique by machine or by IP?

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