Which Front End Optimization technique can a Citrix Engineer enable on the Citrix ADC to remove all excess whitespace from a file?

Which feature of Learning should a Citrix Engineer configure to direct Citrix Web App Firewall to learn from specific sessions?

Which Front End Optimization technique overcomes the parallel download limitation of web browsers?

Which Front End Optimization technique causes the Citrix ADC to resize images before sending them to the client?

A Citrix Engineer needs to prevent an attack against insecure operating-system or web-server software.
The attack can cause the system to crash or behave unpredictably when it receives a data string that is larger than it can handle.
Which security check on the Application Firewall can the engineer enable to prevent such attacks?