Will give !

which of the following defines a protocol?

systems used to control access to a network
nodes used to ensure that messages are sent and received at their proper places
rules that check the reliability of data within a network
rules for organizing data sent through a communications network

rules for organizing data sent through a communications network

Explanation:

a set of rules or procedures for organizing and transmitting data between electronic devices, such as computers. In order for computers to exchange information, there must be a preexisting agreement as to how the information will be structured and how each side will send and receive it.

hope this helps

Rules for organizing data sent through a communications network

Explanation:

I would agree with this answer. Refer to the definition of protocol.

"the official procedure or system of rules governing affairs of state or diplomatic occasions."

Therefore that narrows it down to the last two options that deal with "rules." And the rules that check the reliability of data within a network doesn't really connect with the definition of protocol.

So the answer has to be the last option.

the answer is d. splog