A.scanning streaming media for malware
B.scanning multiple downloads at the same time
C.passing pieces of a download to the client while the download is being scanned
D.passing scanned pieces of the file between two different malware-scanning engines

A.a list of proxy servers that are to be bypassed
B.a list of clients and destinations that will bypass the proxy in transparent mode
C.a list of clients and destinations that will bypass the proxy in explicit forward mode
D.a list of user agents exempt from authentication