Which design principle will help me add an element of interest in my poster by avoiding confusion and monotony?

You could add pictures to help convey the viewer, while capturing their attention. It will provide great interest as well.

Explanation:

Me being a viewer, I love to see pictures. They help explain the topic, while keeping my attention.

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.