What are PAC files used for？（） 

A. the destination was manually added to the block list
B. the malware category is set to blocking mode
C. the transaction was blocked because of application or object properties
D. the transaction was manually blocked by the administrative user

A.time of day
B.user agent
C.proxy port
D.usage quotas

A. the proxy blocked an outbound request because the client is infected with malware
B. the proxy blocked access to a site with a low reputation score
C. the proxy blocked access to a site because of a suspicious server response
D. your appliance or the WBRS key is out of support