Escape (or back door) in application I/O interface A) allows a user to interrupt a device at any time.
B) allows access to a few additional devices, such as a time-of-day clock and a timer.
C) transparently passes arbitrary commands from an application to a device driver.
D) enables managing of devices with widely varying speeds ranging from a few bytes per second to gigabytes per second.

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.