多項選擇題Which three options are features of VTP version 3？（）

A.VTPv3 supports 8K VLANs.
B.VTPv3 supports private VLAN mapping.
C.VTPv3 allows for domain discovery.
D.VTPv3 uses a primary server concept to avoid configuration revision issues.
E.VTPv3 is not compatible with VTPv1 or VTPv2.
F.VTPv3 has a hidden password option.


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1.單項選擇題Spanning Tree Protocol calculates path cost based on which of these？ （）

A. interface bandwidth
B. interface delay
C. interface bandwidth and delay
D. hop count
E. bridge priority

2.多項選擇題Loop guard and UniDirectional Link Detection both protect against Layer 2 STP loops. In which two ways does loop guard differ from UDLD in loop detection and prevention？ （）

A. Loop guard can be used with root guard simultaneously on the same port on the same VLAN while UDLD cannot
B. UDLD protects against STP failures caused by cabling problems that create one-way links.
C. Loop guard detects and protects against duplicate packets being received and transmitted on different ports
D. UDLD protects against unidirectional cabling problems on copper and fiber media.
E. Loop guard protects against STP failures caused by problems that result in the loss of BPDUs from a designated switch port.

3.多項選擇題Which two options are contained in a VTP subset advertisement？（）

A.followers field
B.MD5 digest
C.VLAN information
D.sequence number

4.單項選擇題

Refer to the exhibit. In the diagram，the switches are running IEEE 802.1w RSPT. On which ports should root guard be enabled in order to facilitate deterministic root bridge election under normal and failure scenarios？（）

A. GE-3/1， GE-3/2
B. FE-2/1， FE-3/2
C. GE-1/1， GE-1/2
D. GE-4/1， GE-4/2
E. GE-2/1， GE-2/2
F. GE-3/1， GE-3/2， GE-4/1， GE-4/2， FE-2/1， FE-3/2