To access highest quality Pure Stream available at 80Mbps you must have a minimum internet speed of 115Mbps over Wi-Fi. Ethernet (wired LAN) connections are limited to 100 Mbps due to the TV’s product specifications. Therefore, to enjoy 80 Mbps with Pure Stream functionality, you need to connect to the Internet via Wi-Fi (wireless LAN) that supports minimum IEEE 802.11 n/ac.
https://electronics.sony.com/bravia-core
To access highest quality Pure Stream available at 80Mbps you must have a minimum internet speed of 115Mbps over Wi-Fi. Ethernet (wired LAN) connections are limited to 100 Mbps due to the TV’s product specifications. Therefore, to enjoy 80 Mbps with Pure Stream functionality, you need to connect to the Internet via Wi-Fi (wireless LAN) that supports minimum IEEE 802.11 n/ac.