When talking about networking and Internet, what is a port?

1.	When talking about networking and Internet, what is a port?
A.	An external output device.
B.	An input device.
C.	It's the protocol that e-mail messages have to follow to travel over the Internet.
D.	It's a data connection that allows information transfer to and from a specific server process.
Answer» E.

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When talking about networking and Internet, what is a port?

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