Application of which of the following Institute of Electrical and Electronics Engineers (IEEE) standards will prevent an unauthorized wireless device from being attached to a network?

Question

Options

• AIEEE 802.1F
• BIEEE 802.1H
• CIEEE 802.1Q
• DIEEE 802.1X

• A
  6% (2)
• C
  3% (1)
• D
  90% (28)

Explanation

IEEE 802.1X is a port-based Network Access Control (NAC) standard that requires devices to authenticate before being granted access to a network, effectively preventing unauthorized wireless (or wired) devices from connecting. It works by acting as a gatekeeper at the network port level, requiring credentials to be verified by an authentication server (such as RADIUS) before allowing any traffic through.

Why the distractors are wrong:

• 802.1F is not a widely recognized or relevant IEEE standard in this context
• 802.1H relates to MAC bridging for Ethernet networks and has no authentication function
• 802.1Q is the standard for VLAN tagging, which segments network traffic but does not authenticate or block unauthorized devices

Memory Tip: Think of the "X" in 802.1X as a big red "X" blocking unauthorized users - it's the eXclusion standard that keeps unwanted devices out of your network. If you remember "X = eXclude unauthorized access," you'll never confuse it with 802.1Q (which is for QVLAN/tagging).

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