You wrote that this is for an exam revision, and that makes it an education question.

As it says in What topics can I ask about here?:

Network Engineering Stack Exchange is for asking questions about professionally managed networks in a business environment.

Also, under Off-Topic: "education, certification, or homework" questions.

The problem with those type of questions is that the course material may not agree with what happens in the real world, which is what we answer about here. Many such questions which have popped up here over the years have typos in either the question or answer, or someone's instructor was giving out information (which could be tested) that doesn't match the answers which would be given here.

The community has decided not to accept those types of questions. This has been the case from the very early days. See this question and the accepted answer.

You wrote that this is for an exam revision, and that makes it an education question.

As it says in What topics can I ask about here?:

Network Engineering Stack Exchange is for asking questions about professionally managed networks in a business environment.

Also, under Off-Topic: "education, certification, or homework" questions.

The problem with those type of questions is that the course material may not agree with what happens in the real world, which is what we answer about here. Many such questions which have popped up here over the years have typos in either the question or answer, or someone's instructor was giving out information (which could be tested) that doesn't match the answers which would be given here.

The community has decided not to accept those types of questions. This has been the case from the very early days. See this question and the accepted answer.