As I noted over on the VOIPSA blog today, I've made available some slides I used for a "SIP, UC and Security" talk last month. Readers of the book will recognize some of the diagrams. ;-)
SIP, Unified Communications (UC) and Security
View more presentations from Dan York.
P.S. If you would like me to give a presentation like this to an audience within your organization or at an event you organize, I am always open to considering new places to speak.