多項(xiàng)選擇題Which statement describe two of the benefits of VLAN Trunking Protocol?（）

A. VTP allows routing between VLANs.
B. VTP allows a single switch port to carry information to more than one VLAN.
C. VTP allows physically redundant links while preventing switching loops.
D. VTP simplifies switch administration by allowing switches to automatically share VLAN configuration information.
E. VTP helps to limit configuration errors by keeping VLAN naming consistent across the VTP domain.
F. VTP enhances security by preventing unauthorized hosts from connecting to the VTP domain.


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1.多項(xiàng)選擇題The network security policy requires that only one host be permitted to attach dynamically to each switch interface. If that policy is violated, the interface should shut down. Which two commands must the network administrator configure on the 2950 Catalyst switch to meet this policy?（）

A. TestKing1(config-if)# switchport port-security maximum 1
B. TestKing1(config)# mac-address-table secure
C. TestKing1(config)# access-list 10 permit ip host
D. TestKing1(config-if)# switchport port-security violation shutdown
E. TestKing1(config-if)# ip access-group 10

2.單項(xiàng)選擇題Which PPP subprotocol negotiates authentication options?（）

A.NCP
B.ISDN
C.SLIP
D.LCP
E.DLCI

4.單項(xiàng)選擇題What is the purpose of Spanning Tree Protocol?（）

A. to prevent routing loops
B. to create a default route
C. to provide multiple gateways for hosts
D. to maintain a loop-free Layer 2 network topology
E. to enhance the functions of SNMP

5.單項(xiàng)選擇題What is the function of the CSMA/CD algorithm in Ethernet technologies?（）

A. defines how the media is accessed
B. supplies a token to determine which host has access to the media
C. defines the encoding of electrical signals on the wire
D. determines the preamble bits