Below is a video that describes and show the different types of replication that you need to know, when you want to try the Exam 70-462. To get full benefit from this blog you must have the book for the Training Kit 70-462 (ISBN: 978-0-7356-6607-8).
Some of the keypoints to the exam is:
- Understand the replication architecture (page 200)
- Understand the replication types (snapshot, transactional, peer-to-peer, Merge). Page 302 and forward
- Understand the replication monitor (page 315)
I also think it is important to understand what an agent is (at least the snapshot and log reader agent) and that all agents just are implemented by using SQL Server Agent jobs.
So.. Here is the video that hopefully helps you understanding replication