Without proper
safeguards,every part of a network is vulnerable to a security breach or
unauthorized activity from（ ）,competitors,or even employees.Many of
the organizations that manage their own
（ ）network security and use
the Internet for more than just sending/receiving e-mails experience a
network（本题）—and more than half of these companies do
not even know they were attacked.Smaller
（ ）are often complacent,
having gained a false sense of security.They usually react to the last virus
or the most recent defacing of their website.But they are
trapped in a
situation where they do not have the necessary time and（ ）
to spend on security.
A.attack
B.collapse
C.breakdown
D.virus

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