What are the differences between using a service versus using an application for Security Policy match

Option D.

Explanation:

In the question, there is some information of the question is missing that is Options of the question.

Using a "service" helps the firewall to act immediately according to the 1st packet detected, depending on port details. Using "application" helps the firewall to act immediately unless the port used here is a part of the normal port set of programs. So, the following are the variations between the use of a service and the use of a security policy match application

answer; i believe the correct answer is (b) by using a multimeter;