To determine whether a particular file has a virus by only inspecting a few initial packets before receiving the entire file, which UTM feature do you enable?（）

A. The SRX device sends the URL to the SurfControl server in the cloud and the SurfControl server provides the SRX. 
B. The SRX device sends the URL to the SurfControl server in the cloud and the SurfControl server asks the SRX device previously visited.
C. The SRX device looks at its local cache to find the category of the URL.
D. The SRX device does not perform any Web filtering operation as the Web site has already been visited.

A.1
B.4
C.8
D.16

A. PAT is not supported.
B. PAT is enabled by default.
C. It supports the address-persistent configuration option.
D. It supports the junos-global configuration option.