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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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
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
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
Refer to the exhibit. On the basis of the output generated by the show commands，
which two statements are true？（）
A. Because it is configured as a trunk interface， interface gigabitethernet 0/1 does not appear in the show vlan output.
B. VLAN 1 will not be encapsulated with an 802.1q header.
C. There are no native VLANs configured on the trunk.
D. VLAN 2 will not be encapsulated with an 802.1q header.
E. All interfaces on the switch have been configured as access ports.
F. Because it has not been assigned to any VLAN， interface gigabitethernet 0/1 does not appear in the show vlan output.
The Company core switches use 802.1Q trunks to connect to each other.
How does 802.1Q trunking keep track of multiple VLANs？ （）
A. It tags the data frame with VLAN information and recalculates the CRC value
B. It encapsulates the data frame with a new header and frame check sequence
C. It modifies the port index of a data frame to indicate the VLAN
D. It adds a new header containing the VLAN ID to the data frame
E. None of the other alternatives apply
最新試題
During routine maintenance， G1/0/1 on DS1 was shutdown. All other interface were up. DS2 became the active HSRP device for Vlan101 as desired. However， after G1/0/1 on DS1 was reactivated. DS1 did not become the active HSRP device as desired. What need to be done to make the group for Vlan101 function properly ？ （）
What must be the same to make multiple switches part of the same Multiple Spanning Tree （MST）？（）
Refer to the exhibit. For what purpose is the command show ip cef used？（）
How are STP timers and state transitions affected when a topology change occurs in an STP environment？（）
Which statement is correct about RSTP port roles？（）
Which two statements about the various implementations of STP are true？（）
Refer to the exhibit. What will happen when one more user is connected to interface FastEthernet 5/1？ （）
Refer to the exhibit. On the basis of the output of the show spanning-tree inconsistentports command， which statement about interfaces FastEthernet 0/1 and FastEthernet 0/2 is true？（）
DS2 has not become the active device for Vlan103’s HSRP group even though all interfaces are active. As related to Vlan103’s HSRP group. What can be done to make the group function properly ？ （）
Which three statements are true of the Link Aggregation Control Protocol （LACP）？（）