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
相关考题
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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？（）
A. CompanySwitch（config-if）#switchport trunk encapsulation dot1q
B. CompanySwitch（config-if）#switchport trunk encapsulation itef
C. CompanySwitch（config-if）#switchport trunk encapsulation fddi
D. CompanySwitch（config-if）#switchport trunk encapsulation isl
E. None of the other alternatives apply -
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？（）
A. The interface actively attempts to convert the link to a trunk link.
B. The interface is put into permanent trunking mode but prevented from generating DTP frames.
C. The interface is put into permanent trunking mode and negotiates to convert the link into a trunk link.
D. The interface is put into a passive mode， waiting to convert the link to a trunk link.
E. None of the other alternatives apply
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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？（）
A. The IEEE 802.1Q frame format adds a 4 byte field to a Ethernet frame
B. The packet is encapsulated with a 26 byte header and a 4 byte FCS
C. The protocol uses point-to-multipoint connectivity
D. The protocol uses point-to-point connectivity
E. The IEEE 802.1Q frame uses multicast destination of 0x01-00-0c-00-00
F. The IEEE 802.1Q frame retains the original MAC destination address
