200-301 Question #735: Real Exam Question with Answer & Explanation

Question

What happens when an 802.11a node broadcasts within the range of an 802.11g access point?

Options

• AThe access point transmits, but the node is unable to receive.
• BA connection occurs
• CBoth the node and the access point are unable to transmit.
• DThe node transmits, but the access point is unable to receive.

Explanation

802.11a and 802.11g networks operate on different frequency bands, making them incompatible for direct communication.

Common mistakes.

• A. The 802.11g access point and 802.11a node operate on different frequency bands, so neither can typically hear or receive transmissions from the other, meaning the AP cannot transmit and be heard by the node.
• B. A connection cannot occur because 802.11a and 802.11g use different radio frequency bands (5 GHz and 2.4 GHz respectively), rendering them fundamentally incompatible for direct communication.
• C. Both devices are capable of transmitting within their respective frequency bands; however, they cannot communicate with each other because they are operating on different, incompatible bands.

Concept tested. 802.11a vs 802.11g frequency bands

Reference. https://www.cisco.com/c/en/us/td/docs/wireless/access_point/802_11ac_deploy/guide/802_11ac_deploy_guide.html

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