Security+ Question of the Week: Intranet Defense

securityQOW02External hackers often seek to discover the size and configuration of your intranet. Which of the following is a defense against this type of reconnaissance?

A. Install a host IDS on each server.
B. Keep malware scanners updated.
C. Use MAC filtering on border firewalls.
D. Block inbound TCP 53.

Related Courses
Security+ Prep Course (SY0-401)
Security+ Certification Boot Camp (SY0-401)

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