A.avoid mentioning the upgrade to the customer
B.schedule a convenient time to upgrade again， backing up the configuration before and after theupgrade
C.contact customer support and ask them to run the upgrade for you
D.immediately show the customer how to run the CLI command upgrade

A.wccp debug enable
B.tailproxylogs
C.tailaccesslogs
D.showswccp

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

A.client reports will display authenticated usernames
B.client reports will display both the username and IP address of the clients
C.client reports are not affected by authentication
D.client reports will display the IP address of the authentication server