802.3cq-2020 IEEE Std 802.3cq-2019 (Amendment to IEEE Std 802.3-2018 as amended by IEEE Std 802.3cb-2018, IEEE Std 802.3bt-2018, IEEE Std 802.3cd-2018, IEEE Std 802.3cn-2019, and IEEE Std 802.3cg-2019)