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To deliver a message to the correct application program running on a host, the _______ address must be consulted.

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To deliver a message to the correct application program running on a host, the _______ address must be consulted.

(a) IP

(b) MAC

(c) Port

(d) None of the mentioned

This question was posed to me in unit test.

The doubt is from Application Layer in chapter Application Layer of Computer Network

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The correct choice is (c) Port

The best I can explain: IP address lets you know where the network is located. Whereas MAC address is a unique address for every device. Port address identifies a process or service you want to carry on.

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