多項選擇題A Catalyst 2950 needs to be reconfigured. What steps will ensure that the old configuration is erased?（）

A. Erase flash.
B. Restart the switch.
C. Delete the VLAN database.
D. Erase the running configuration.
E. Erase the startup configuration.
F. Modify the configuration register.


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2.多項選擇題What are two results of entering the Switch(config)# vtp mode client command on a Catalyst switch?（）

A. The switch will ignore VTP summary advertisements.
B. The switch will forward VTP summary advertisements.
C. The switch will process VTP summary advertisements.
D. The switch will originate VTP summary advertisements.
E. The switch will create, modify and delete VLANs for the entire VTP domain.

3.多項選擇題What are three valid reasons to assign ports to VLANs on a switch?（）

A. to make VTP easier to implement
B. to isolate broadcast traffic
C. to increase the size of the collision domain
D. to allow more devices to connect to the network
E. to logically group hosts according to function
F. to increase network security

5.多項選擇題What are the possible trunking modes for a switch port?（）

A. transparent
B. auto
C. on
D. desirable
E. client
F. forwarding