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Which of the following is by far the most common prevention system from a network security perspective?
A. Firewall
B. IDS
C. IPS
D. Hardened OS
E. Tripwire
F. None of the choices.
Correct Answer: A
Explanation/Reference:
User account access controls and cryptography can protect systems files and data, respectively. On the other hand, firewalls are by far the most common prevention systems from a network security perspective as they can shield access to internal network services, and block certain kinds of attacks through packet filtering.
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