Windows 7 (specifically SP1 64-bit versions).
While users search for "11", common stable versions found in repositories include 7.35.317.3 , 6.34.223.5 , and 5.100.196.15 . Where to Find the Driver broadcom 80211n network adapter driver windows 7 64 bit 11
802.11n (Wi-Fi 4), often backwards compatible with 802.11a/b/g. Windows 7 (specifically SP1 64-bit versions)