it is all in MT reference manual see there, there are many questions answered about routeros configuration. if you have test router even better - you can test everything yourself.
please read manual, and then ask questions.
if there is no or little information provided please follow links to RFC or Google about technology you are interested in. usually there is an answer in simple networking documentations, if you do not know basics most probably you wont be able to configure your routerOS correctly and will eventually have problems.