Website Architecture Design
Layer Leader of Solutions
Firewall Cisco
Core Switch(L3) Cisco
Router(Optional) Cisco
Load Balancer(Including SNAT) F5 Big-IP
Cache Server Squid(Reverse)
Web Server Apache
Application Server WebLogic/WebSphere/JBoss for JEE or Apache/Nginx for PHP
Firewall Cisco
Database Server Oracle/DB2/M$ SQL/MySQL/PostgreSQL

See Also

Software Loadbalancer cn