The main objective of the Java Security Model ( JSM) is to:
A.
Provide accountability for events
B.
Protect the user from hostile, network mobile code
C.
Protect the local client from user-input hostile code
D.
Protect a web server from hostile, client code
Explanation:
When a user accesses a Web page through a browser, class files for an applet are downloaded
automatically, even from untrusted sources. To counter this possible threat, Java provides a
customizable sandbox to which the applets’ execution is confined. This sandbox provides such
protections as preventing reading and writing to a local disk, prohibiting the creation of a new
process, prevention of making a network connection to a new host and preventing the loading of a
new dynamic library and directly calling a native method. The sandbox security features are
designed into the Java Virtual Machine (JVM). These features are implemented through array
bounds checking, structured memory access, type-safe reference cast checking to ensure that
casting to an object of a different type is valid, and checking for null references and automatic
garbage collection. These checks are designed to limit memory accesses to safe, structured
operations. The other answers are distracters.