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单项选择题

While using a packet analyzer, you notice four additional bytes being added to the packets in the  Company network. 
Which protocol inserts a four byte tag into the Ethernet frame and recalculates  CRC value?  ()

A. DTP
B. VTP
C. 802.1Q
D. ISL
E. None of the other alternatives apply

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单项选择题 You need to configure a new Company switch for trunking.  Which switch command enables a  trunking protocol that appends a four byte CRC to the packet?()

单项选择题 Switch R1 has been configured with DTP using the desirable option.  Which statement describes  Dynamic Trunking Protocol (DTP) desirable mode?()

多项选择题 The core Company switches are configured to use 802.1Q trunks.  Which three statements are  correct with regard to the IEEE 802.1Q standard?()

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