Where is an XML firewall most commonly and effectively deployed in the environment? 

Answer options:

A. Between the application and data layers
B. Between the presentation and application layers
C. Between the IPS and firewall
D. Between the firewall and application server

D

An XML firewall is most commonly deployed in line between the firewall and application server to validate XML code before it reaches the application. An XML firewall is intended to validate XML before it reaches the application. Placing the XML firewall between the presentation and application layers, between the firewall and IPS, or between the application and data layers would not serve the intended purpose.