What does the 802.3bz standard describe?

What does the 802.3bz standard describe?

• A. 2.5Gb and 5Gb Ethernet ports
• B. 60 W and 90W PoE
• C. AP directed roaming between APs
• D. 60 GHz point-to-point Wi-Fi

Answer: (A)

Multi-gig Ethernet over copper is what this standard enables. IEEE 802.3bz defines two higher-speed Ethernet PHYs—2.5GBASE-T and 5GBASE-T—that run over existing copper twisted-pair cabling (Cat5e or better) and use the same RJ45 connectors. This provides 2.5 Gbps or 5 Gbps Ethernet ports while remaining backward compatible with 1 Gbps devices, allowing network upgrades without new cabling. The other options describe technologies outside this standard: PoE power levels are defined by separate PoE standards, wireless AP roaming is a wireless feature, and 60 GHz point-to-point Wi-Fi is a different wireless technology.

Multi-gig Ethernet over copper is what this standard enables. IEEE 802.3bz defines two higher-speed Ethernet PHYs—2.5GBASE-T and 5GBASE-T—that run over existing copper twisted-pair cabling (Cat5e or better) and use the same RJ45 connectors. This provides 2.5 Gbps or 5 Gbps Ethernet ports while remaining backward compatible with 1 Gbps devices, allowing network upgrades without new cabling. The other options describe technologies outside this standard: PoE power levels are defined by separate PoE standards, wireless AP roaming is a wireless feature, and 60 GHz point-to-point Wi-Fi is a different wireless technology.