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?（）

单项选择题The same Web site is visited for the second time using a branch SRX Series Services Gateway configured with SurfControl integrated Web filtering.Which statement is true?（）

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.

单项选择题What is the maximum number of layers of compression that kaspersky-lab-engine (full AV) can decompress for the HTTP protocol?（）

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