Internet Protocol (IP) Address Question:

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What is a Subnet mask?

IP Address Interview Question
IP Address Interview Question

Answer:

A Subnet Mask is an address mask that allows, systems to differentiate between the Network ID from that that of the Host Ids in a IP Address. This is represented very much as how an Ip address is represented.

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How come the systems know to differentiate between Network ID and the HOST ID?What is IPV6?