I have a bunch of study materials for the old BSCI exam (642-801). I hear that 642-901 covers OSPF v 3 and multicast routing & pim.
I have learned of some changes to the IPv6 specs since my study materials were published (no more site-local addressing, e.g.).
So do I need to buy all new $60 textbooks, or is there a less expensive way to brush up on the material that's new in 642-901 and not covered in the 642-801 curriculum?