[多选] Which three of these statements regarding 802.1Q trunking are correct？（）

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.

一方因重大误解订立了合同，他（）。可以单方宣布合同无效。可以拒绝履行合同。必须履行合同。可以向法院请求撤销合同。在（）阶段实施价值管理对目标实现影响最大。前期决策和设计阶段。施工阶段。运行阶段。报废阶段。无票乘车时，补收（）起至到站止车票票价，并加收已乘区间应补票价百分之五十的票款。自发现的前方站。自列车始发站。发现站。自乘车站（不能判明时自始发站）。下列哪所学校可以购买学生票（）。职工大学。军事学校。业余广播大学。函授大学。 When configuring Cisco IOS login enhancements for virtual connections， what is the "quiet period"？（） The period of time in which virtual login attempts are blocked， following repeated failed login attempts。 The period of time in which virtual logins are blocked as security services fully initialize。 A period of time when no one is attempting tolog in。 The period of time between successive login attempt。 Which three of these statements regarding 802.1Q trunking are correct？（）

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[多选] Which three of these statements regarding 802.1Q trunking are correct？（）

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