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【单项选择题】

Refer to the output. What IOS command produces this output？（）<br /> <img src="https://img.ppkao.com/2018-07/yiyu/2018073011280476147.jpg" /><p> Refer to the output. What IOS command produces this output？（）<br /> <img src="https://img.ppkao.com/2018-07/yiyu/2018073011280476147.jpg" /></p>

A、A. show i p ospf

B、B. show ip ospf interface

C、C. show ipv6 ospf interface

D、D. show ipv6 ospf

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第1题
[] Refer to the exhibit. Based on this command output, what can we conclude about R3?（） Refer to the exhibit. Based on this command output, what can we conclude about R3?（）

A、A. R3 is an ABR.  B、B. R3 is not connec ted to the backbone.  C、C. R3 has four neighbors.  D、D. R3 is the DR for area 2.  

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第2题
[] Refer to the exhibit. An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?（） Refer to the exhibit. An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?（）

A、A.data link layer  B、B.application layer  C、C.access layer  D、D.session layer  E、E.network layer  

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第3题
[] Refer to the exhibit. An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?（） Refer to the exhibit. An administrator pings the default gateway at 10.10.10.1 and sees the output as shown. At which OSI layer is the problem?（）

A、A.data link layer  B、B.application layer  C、C.access layer  D、D.session layer  E、E.network layer  

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第4题
[单选题] Refer to the exhibit.Assuming that the entire network topology is shown, what is the operational status of the interfaces of R2 as indicated by the command output shown?（）

A、One interface has a problem.  B、Two interfaces have problems.  C、The interfaces are functioning correctly.  D、The operational status of the interfaces cannot be determined from the output shown.  

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第5题
[] Refer to the exhibit. Given the output shown from this Cisco Catalyst 2950, what is the most likely reason that interface FastEthernet 0/10 is not the root port for VLAN 2?（） Refer to the exhibit. Given the output shown from this Cisco Catalyst 2950, what is the most likely reason that interface FastEthernet 0/10 is not the root port for VLAN 2?（）

A、A.This switch has more than one interface connected to the root network segment in VLAN 2.  B、B.This switch is running RSTP while the elected designated switch is running 802.1d Spanning Tree.  C、C.This switch interface has a higher path cost to the root bridge than another in the topology.  D、D.This switch has a lower bridge ID for VLAN 2 than the elected designated switch.  

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第6题
[单选题] Refer to the exhibit. What does the (*) represent in the output?（）

A、Packet is destined for a local interface to the router.  B、Packet was translated, but no response was received from the distant device.  C、Packet was not translated, because no additional ports are available.  D、Packet was translated and fast switched to the destination.  

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第7题
[单选题] A home user would like to connect their laptop display to their home HD television. Which of the following is the BEST solution?（）

A、Connecting the laptop’s VGA output to an HDMI adaptor  B、Connecting the laptop’s VGA output to the television’s VGA input  C、Connecting the laptop's USB output to the HD television’s HDMI adaptor  D、Connecting the laptop’s USB output to the television’s USB input  

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第8题
[] Refer to the exhibit. Look at the command output. What would be the most probable reason for this port-ID mismatch？（） Refer to the exhibit. Look at the command output. What would be the most probable reason for this port-ID mismatch？（）

A、A.spanning-tree misconfiguration  B、B.speed mismatch configuration  C、C.cabling problem  D、D.configuration problem  

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第9题
[] Refer to the exhibit.If the devices produced the given output,what is the cause of the EtherChannel problem?（） Refer to the exhibit.If the devices produced the given output,what is the cause of the EtherChannel problem?（）

A、A.There is a speed mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces.  B、B.There is an MTU mismatch between SW1's Fa0/1 and SW2's Fa0/1 interfaces.  C、C.There is an encapsulation mismatch between SW1's Fa0/1 and SW2's Fa0/1 interface.  D、D.SW1's Fa0/1 interface is administratively shut down.  

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