"Security Architecture: Design, Deployment and Operations" King, Dalton, and Osmanoglu from RSA Press
"Active Defense: A Comprehensive Guide to Network Security" Brenton and Hunt, from Sybex
And while other Web sites are available, let's not forget to run a query on "network architecture" right here on SearchNetworking.com. There are several items under advice along with other articles that will help guide you.
This was first published in August 2003