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多項選擇題Which two commands can be used to verify a trunk link configurationt status on a given cisco switch?（）

A.show interfaces interface
B.show interfaces interface trunk
C.show interfaces interface switchport
D.show ip interface brief
E.show interfaces vlan

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1.單項選擇題 Refer to the exhibit.After a RIP route is marked invalid on Router_1， how much time will elapse before that route is removed from the routing table？（）

A.30 seconds
B.60 seconds
C.90 seconds
D.180 seconds
E.240 seconds

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2.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

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3.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

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4.多項選擇題Which commands are required to properly configure a router to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0?（）

A.Router(config)#router ospf 1
B.Router(config)#router ospf 0
C.Router(config)#router ospf area 0
D.Router(config-router)#network 192.168.16.0 0.0.0.255 area 0
E.Router(config-router)#network 192.168.16.0 0.0.0.255 0
F.Router(config-router)#network 192.168.16.0 255.255.255.0 area 0

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5.單項選擇題 Refer to the exhibit.S0/0 on R1 is configured as a multipoint interface to communicate with R2 and R3 in the hub-and-spoke Frame Relay topology. While testing this configuration， a technician notes that pings are successfully from hosts on the 172.16.1.0/24 network to hosts on both the 172.16.2.0/25 and 172.16.0.2.128/25 networks. However， pings between hosts on the 172.16.2.0/25 and 172.16.2.128/25 network are not successful. What could explain this connectivity problem？（）

A.The ip subnet-zero command has been issued on the R1 router.
B.The RIPv2 dynamic routing protocol cannot be used across a Frame Relay network.
C.Split horizon is preventing R2 from learning about the R3 networks and R3 from learning about R2 networks.
D.The 172.16.2.0/25 and 172.16.2.128/25 networks are overlapping networks that can be seen by R1,but not between R2 and R3.
E.The 172.16.3.0/29 network used on the Frame Relay links is creating a discontiguous network between the R2 and R3 router subnetworks.

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