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当Access端口收到帧时，如果该帧不包含802.1Q tag header，将打上端口的PVID 当Access端口收到帧时，如果该帧包含802.1Q tag header中的VLANID和端口不一致，则更改tag中的VLANID为PVID 当Access端口发送帧时，剥离802.1Q tag header，发出的帧为普通以太网帧 当Access端口发送帧时，保留802.1Q tag header，发出的帧为带tag的以太网帧
Yes, we would like to do so. Sorry, but we go strictly by the price tag. No, but you may try again. Sure. We'll come to the first floor as soon as possibl
UNTAG，TAG TAG，透传 TAG，翻译 透传，透传
TAG模式下下行:有VLAN tag的按照VID转发到相应的UNI端口，并剥除tag（可能是两层VLANTAG中的外层TAG）无VLAN tag的丢弃。 TAG模式下上行：有VLAN tag的丢弃无VLAN tag的按照端口VID值打上TAG； transparent（透传）模式下对所有的包的vlan都不做处理，直接转发。 translation（交换）模式下上下行都一样无VLAN tag的转发，有VLAN tag且VID在转换表中有的按照列表转换后转发，列表中没有的丢弃。
Trunk端口既可以用来连接网络设备，也可以用来连接主机 Trunk端口允许多个VLAN的帧（带Tag标记）通过 Trunk端口发送出去的帧都带Tag Trunk端口接收到的不带Tag的帧，交换设备会在帧中加上Tag标记
INDEX ON职工号TAG zgh UNIQUE INDEX TO职工号TAG zgh UNIQUE INDEX ON职工号TAG zgh CANDIDATE INDEX TO职工号TAG zgh CANDIDATE
INDEX ON姓名TAG xm UNIQUE INDEX TO姓名TAG xm UNIQUE INDEX ON姓名TAG xm CANDIDATE INDEX TO姓名TAG xm CANDIDATE
DELEATE TAG DELEATE TAG ALL DROP TAG DROP TAG ALL
INDEX ON职工号TAG zgh UNIQUE INDEX TO职工号TAG zgh UNIQUE INDEX ON职工号TAG zgh CANDIDATE INDEX TO职工号TAG zgh CANDIDATE
Yes, we would like to do so. Sorry, but we go strictly by the price tag. No, but you may try again. Sure. We'll come to the first floor as soon as possible.
寻呼 SI中Value Tag SB中Value Tag SIB1中Value Tag
Yes, we would like to do so. Sorry, but we go strictly by the price tag. No, but you may try again. Sure. We’ll come to the first floor as soon as possibl
TAG/UNTAG/不属于，其实可以规为两类操作：属于和不属于 TAG/UNTAG的区别就是对用于转发的PVID字节的处理 配置TAG则从属于该VLAN的端口出去的包剥离该VID字节 UNTAG则保留该VID字节
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