Thank you,

I have read in blogs/books that, when we are setting up mirroring/Log shipping we have to take the both Full backup&Transactional backup and restore them to the secondary server as an initial step.

If the Full backup contains all the completed transactions then what is the benefit of again taking the Transactional backup again?

Even if we take the t-log if that contains not completed transactions those will not be committed over secondary right?

Kindly explain.