A、目的地址和Type字段之间
B、Type字段之前
C、802.1QVLAN Tag之前
D、Type字段和Data字段之间
更多“QinQ帧和802.1Q帧是有区别的，QinQ帧是有两层VLAN Tag的，相比802.1Q帧多的是在（）插入4B长度的VLAN Tag”相关的问题
A、IEEE802.1Q是一种中继标准，支持标签帧和无标签帧 B、接入链路和中继链路必须支持IEEE802.1Q协议 C、标签帧可在支持IEEE802.1Q的交换机之间传送 D、如果不支持IEEE802.1Q的PC收到标签帧，该帧会被丢弃
A、A.802.1Q本地VLAN帧未标记的默认 B、B.802.1Q中继端口，也可以是安全的端口 C、C.802.1Q中继可以使用10Mb/s以太网接口 D、D.802.1Q中继需要全双工，点对点连接 E、E.802.1Q中继应该两头的本地VLAN是相同的
A、A.802.1q是Cisco专有协议。 B、B.802.1q帧通过MAC地址映射到VLAN C、C.802.1q不需要重新计算原始帧的FCS D、D.802.1q对通过接入端口转发出去的帧不会执行操作
A、在源MAC地址字段和协议类型字段之间加入4字节的802.1Q的TAG B、在目的MAC地址字段和协议类型字段之间加入4字节的802.1Q的TAG C、封装802.1Q帧的目的MAC地址使用的是0X01-00-0C-00-00 D、封装802.1Q帧不改变原有帧的目的MAC地址
A、802.1Q native VLAN frames are untagged by default. B、802.1Q trunking ports can also be secure ports. C、802.1Q trunks can use 10 Mb/s Ethernet interfaces. D、802.1Q trunks require full-duplex, point-to-point connectivity. E、802.1Q trunks should have native VLANs that are the same at both ends.
A、802.1Q native VLAN frames are untagged by default. B、802.1Q trunking ports can also be secure ports. C、802.1Q trunks can use 10 Mb/s Ethernet interfaces. D、802.1Q trunks require full-duplex, point-to-point connectivity. E、802.1Q trunks should have native VLANs that are the same at both ends.
A、802.1Q native VLAN frames are untagged by default. B、802.1Q trunking ports can also be secure ports. C、802.1Q trunks can use 10 Mb/s Ethernet interfaces. D、802.1Q trunks require full-duplex, point-to-point connectivity. E、802.1Q trunks should have native VLANs that are the same at both ends.
A、目前支持802.1q的交换机，都支持QinQ B、支持QinQ的交换机，支持4K×4K个vlan C、灵活QinQ支持的vlan数量要多于基本的QinQ支持的vlan数量 D、QinQ就是VPLS另外一种说法
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