单项选择题

According to the passage, "hacker" is ______.

A．highly recognizable names behind many of the computer technologies used today
B．the negative connotation of those computer users
C．a game, employing the tools that are readily available via the Internet
D．people who break into computer systems

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单项选择题

What is the most important one among the realities listed in the passage

A．New vulnerabilities will be introduced into your environment every day.
B．The manager educates employees about properly configuring firewalls and intrusion detection systems for their PCs.
C．Managers have more responsibility than ever.
D．Security managers are asked to support increasing degrees of network availability and access.

单项选择题

We can learn from the passage that navigation computers ______.

A．will greatly promote sales of automobiles
B．may help solve potential traffic problems
C．are likely to be accepted by more drivers
D．will soon be viewed as a symbol of luxury