TCP Fast Open

[1] May 9, 2017—KB4016871 (OS Build 15063.296 and 15063.297) - Windows Help ( (2017-05-10 20:08:42 +09:00)) <https://support.microsoft.com/ja-jp/help/4016871/windows-10-update-kb4016871>

Addressed an issue where Microsoft Edge users in networking environments that do not fully support the TCP Fast Open standard may have problems connecting to some websites. Users can re-enable TCP Fast Open in about:flags.

[2] Windows 10 Creators Update (Build 1703) > Microsoft Edge で Google サイトにアクセスできない > パッチが公開された - Qiita ( (2017-05-10 20:09:49 +09:00)) <http://qiita.com/7of9/items/73ff7c09fe2c2a2ec10a>