單項選擇題Which line from the output of the show ip interface command indicates a layer 1 problem?()

A. Serial0/1 is up, line protocol is down
B. Serial0/1 is down, line protocol is down
C. Serial0/1 is up, line protocol is up
D. Serial0/1 is administratively down, line protocol is down


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1.單項選擇題Which statement about IPv6 is true?()

A. Addresses are not hierarchical and are assigned at random.
B. Only one IPv6 address can exist on a given interface.
C. There are 2.7 billion addresses available.
D. Broadcasts have been eliminated and replaced with multicasts.

2.單項選擇題Which statement about RIPng is true?()

A. RIPng allows for routes with up to 30 hops.
B. RIPng is enabled on each interface separately.
C. RIPng uses broadcasts to exchange routes.
D. There can be only one RIPng process per router.

3.單項選擇題Which term describes the process of encapsulating IPv6 packets inside IPv4 packets?()

A. tunneling
B. hashing
C. routing
D. NAT

4.單項選擇題What is the first 24 bits in a MAC address called?()

A. NIC
B. BIA
C. OUI
D. VAI

5.單項選擇題When is it necessary to use a public IP address on a routing interface?()

A. Connect a router on a local network.
B. Connect a router to another router.
C. Allow distribution of routes between networks.
D. Translate a private IP address.
E. Connect a network to the Internet.

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Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?()

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A network administrator is trying to add a new router into an established OSPF network.The networks attached to the new router do not appear in the routing tables of the other OSPF routers.Given the information in the partial configuration shown below,what configuration error is causing this problem?()Router(config)#router ospf 1Router(config-router)#network 10.0.0.0 255.0.0.0 area 0

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Which IPsec security protocol should be used when confidentiality is required?()

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Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?()

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What is the purpose of the cisco Vlan Trunking protocol?()

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If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the absence of a loopback interface?()

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