The CCDE written, as published by Cisco, contains 5 major headings for study.
1. IP Routing.
Note: no IPX or Appletalk or anything else. IPv6 basics is a subtopic under ‘generic routing and addressing concepts’ Other than that, no big surprises. I suppose we’ll be concentrating on best practices rather than odd, non-obvious configurations.
There is mention of tunneling non-IP protocols, specifically NetWare IPX.
Nothing specifically relating to Voice/VoIP, just generic requirements for VoIP.
This section is much lighter than the others.
This section is lightest of all (only 5 subheadings)