Two girls were born to the same mother, on the same day, at the same time, in the same month and the same year and yet they're not twins. How is that possible?

They are not twins but triplets or quadruplets.  

Explanation:

continuous information you receive.

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.