A(n)is the interface used toconnect external devices to the computer.
a. drive
b. expansionhub
c. hub
d. port

D. PORT

Explanation:

A Port is the interface used to connect external devices to  computer.

Ports are of various types based on the type of communication interface:

For example:

Computer peripherals like mouse,keyboard, modem, printer etc connect to the computer via the port which is in accordance with their specified communication interface.

solution:

this situation is called an ip conflict.

data from a server is sent in small bits called packets. in an ip conflict, some packets will end up in one computer while some other packets will end up in another computer.

so…overall none of the computers get the data as the original message or picture being sent by the server cannot be retrieved with only half the packets. so it will show up as an error.

thus the final answer is d.

answer///radio frequency interference (rfi);