Core 1: 220-1101, Core 2: 220-1102

{'correct_reasoning': 'The 2.4 GHz Wi-Fi band has only three non-overlapping channels (1, 6, and 11 in North America). In a dense environment like an office building with many neighboring networks, all these channels become congested with competing traffic. Additionally, many non-Wi-Fi devices (microwave ovens, Bluetooth, baby monitors, cordless phones) also operate in the 2.4 GHz spectrum, adding to interference. The 5 GHz band offers 23+ non-overlapping channels, greatly reducing congestion.', 'incorrect_a': 'WPA3 security is supported on both 2.4 GHz and 5 GHz bands — security protocol is independent of the frequency band.', 'incorrect_b': '', 'incorrect_c': 'Dual-band routers support both 2.4 GHz and 5 GHz simultaneously; the same router hardware provides both bands and client devices simply connect to the preferred band.', 'incorrect_d': 'While 802.11g was limited to 54 Mbps on 2.4 GHz, modern 802.11n and 802.11ac on 2.4 GHz support much higher speeds. The issue is interference, not a speed cap.'}