Unverified50% confidenceFactExact time
VLAN 通过在以太网帧头部添加802.1Q标签，在数据链路层实现逻辑网络分割
1
Sources
50%
Confidence
Long-term
Relevance
7/9/2026
First Seen
Sources
腾达路由器固件隐藏认证后门曝光，多版本受影响用户须警惕
hackernewshackernews7/8/2026
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