單項選擇題Which PPP subprotocol negotiates authentication options?()

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


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2.單項選擇題Assuming the default switch configuration,which approach should you use to configure the extended vlan range(1006 through 4094) on a cisco catalyst 3750 series switch?()

A. Configure the switch to be in VTP client mode.
B. Configure the switch to be in VTP domaint mode.
C. Configure the switch to be in VTP transparent mode.
D. Configure the switch to be in VTPv2.

3.單項選擇題In which integration method is an IPV6 packet encapsulated within an IPV4 protocol?()

A. proxy.
B. dual-stack
C. tunneling
D. dot1q

4.單項選擇題The enable secret command is used to secure access to which CLI mode?()

A. user EXEC mode
B. global configuration mode
C. privileged EXEC mode
D. auxiliary setup mode

5.單項選擇題Which statement about vlan operation on cisco catalyst switches is true?()

 A. when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.
B. unkown unicast frames are retransmitted only to the ports that belong to the same vlan
C. ports between switches should be configured in access mode so that vlans can span across the ports
D. broadcast and multicast frames are retransmitted to ports that are configured on different vlan.