The W3C estimate quickly beneath helps make distinct that this isn't the case; alternatively, the no-cache header just ensures that the response have to be revalidated ahead of becoming reused to provide subsequent requests. Even if you are working with nocache, the ETag header is not taken off, because it https://letsbookmarkit.com/story20949599/%E4%BB%AE%E6%83%B3%E9%80%9A%E8%B2%A8%E3%82%AB%E3%82%B8%E3%83%8E-%E3%81%8A%E3%81%99%E3%81%99%E3%82%81-an-overview