單項(xiàng)選擇題Router A is unable to reach Router B.Both routers are running ios version 12.0.After reviewing the command output and graphic,what is the most likely cause of the problem?（）

A. incorrect bandwidt h configuration
B. incorrect LMI configuration
C. incorrect map statement
D. incorrect IP address


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1.單項(xiàng)選擇題Which command enables IPv6 forwarding on a cisco router?（）

A. ipv6 host
B. ipv6 unicast-routing
C. ipv6 local
D. ipv6 neighbor

2.單項(xiàng)選擇題In the implementation of VLSM techniques on a network using a single Class C IP address,which subnet mask is the most efficient for point-to-point serial links?（）

A. 255.255.255.240
B. 255.255.255.254
C. 255.255.255.252
D. 255.255.255.0
E. 255.255.255.248

3.單項(xiàng)選擇題Which IPv6 address is valid?（）

A. 2031:0:130F::9C0:876A:130B
B. 2001:0DB8:0000:130F:0000:0000:08GC:140B
C. 2001:0DB8:0:130H::87C:140B
D. 2031::130F::9C0:876A:130B

4.單項(xiàng)選擇題Which of the following protocols uses both TCP and UDP ports?（）

A. SMTP
B. Telnet
C. FTP
D. DNS

5.單項(xiàng)選擇題Which command enhances the 802.1D convergence time on ports that are connected to hosts?（）

A. spanning-tree backbonefast
B. spanning-tree uplinkfast
C. spanning-tree portfast
D. spanning-tree cost512

7.單項(xiàng)選擇題Which command helps a network administrator to manage memory by displaying flash memory and NVRAM utilization?（）

A. show secure
B. show file systems
C. show flash
D. show version

8.單項(xiàng)選擇題What is the most likely reason for the dispartly between the actual network numbers at the branches and the routes in the routing table on Gateway-Router?（）

A. Branch-Router2 is configured to send both RIPv1 and RIPv2 updates.
B. Gateway-Router is configured to only receive RIPv2 updates.
C. Gateway-router is configured to receive only RIPv1 updates.
D. Branch-Router1 is configured to only send RIPv1 updates

9.單項(xiàng)選擇題which address range efficiently summarizes the routing table of the addresses for router main?（）

A. 172.16.0.0/18
B. 172.16.0.0/16
C. 172.16.0.0/20
D. 172.16.0.0/21

10.單項(xiàng)選擇題assuming the default switch configuration which vlan range can be added modified and removed on a cisco switch?（）

A. 2 through 1001
B. 1 through 1001
C. 1 through 1002
D. 2 through 1005

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At which layer of the OSI model dose PPP perform?（）

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Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain?（）

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What is the default administrative distance of OSPF?（）

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What is the subnetwork address for a host with the IP address 201.100.5.68/28?（）

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A router receives information about network 192.168.10.0/24 from multiple sources.What will the router consider the most reliable information about the path to that network?（）

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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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Which address is the IPV6 all-RIP-routers muticast group address that is used by RIPng as the destaion address?（）

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What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）

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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 cisco ios command can help to determine the timing of various debug events,relative to each other,when you are debugging a complicated router issue?（）

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