I recently took and passed Cisco CCNP Security FIREWALL (642-618). Unfortunately the test changed from 642-617 to 642-618 while I was in the middle of studying, so I had to study the deltas between the old and new tests using the Cisco Press guide. I used CBT Nuggets video training for 642-617 and the official Cert Guide from Cisco Press for 642-618. The biggest difference is that 642-617 covers ASA OS up to version 8.2, whereas 642-618 covers 8.3 and 8.4. In case anyone is interested, I’ve decided to share the notes I took in preparation.
Pro tip: Cisco made major changes to the way NAT is configured and processed in OS versions 8.3 and later versus 8.2 and before. Know them well.