36氪获悉，热门中概股美股盘前普涨，截至发稿，蔚来涨超7%，阿里巴巴、爱奇艺涨超2%，拼多多、网易、小鹏汽车涨超1%，京东涨0.82%，百度涨0.72%，理想汽车跌0.45%。下一篇美股大型科技股盘前涨跌不一，特斯拉涨0.56%36氪获悉，美股大型科技股盘前涨跌不一，截至发稿，特斯拉涨0.56%，Meta涨0.4%，亚马逊涨0.09%，微软涨0.04%，英伟达跌0.3%，谷歌跌0.26%，苹果跌0.11%。
The MAC is in the header because the controller needs to identify the device before decrypting. Encryption keys are per-device, assigned during adoption, so the controller has to know which device is talking before it can look up the right key. Not a security oversight, just a practical requirement. But it means you can route inform traffic without touching the encryption at all.
。关于这个话题，91吃瓜提供了深入分析
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