220-802 Question #1004: Real Exam Question with Answer & Explanation

The correct answer is A: Enable MAC filtering on the router. MAC (Media Access Control) filtering allows the router to maintain an allowlist of approved device hardware addresses, blocking any device whose MAC address is not on the list. This directly addresses the concern about unauthorized devices. Removing patch cables only prevents wir

Question

A small business owner is concerned about any non-business owned devices being connected to their network. Which of the following actions would be the MOST secure way to ensure that only business owned devices can connect?

Options

AEnable MAC filtering on the router
BRemove all extra patch cables from open ports
CSecure the router and switches in a locked room
DDisable the DHCP service on the router

Explanation

MAC (Media Access Control) filtering allows the router to maintain an allowlist of approved device hardware addresses, blocking any device whose MAC address is not on the list. This directly addresses the concern about unauthorized devices. Removing patch cables only prevents wired connections in specific ports but does not stop wireless or other wired access. Locking the router and switches in a room secures the hardware from physical tampering but does not control which devices can connect logically. Disabling DHCP prevents automatic IP assignment, but a determined user can still set a static IP and gain access - it is not a true access control mechanism.

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