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OSPF中，以下关于Network-Summary-LSA中Metric值的描述正确的是？（）
A . Network-Summary-LSA中的Metric值为收到该LSA的路由器到达目的网段的总开销
B . Network-Summary-LSA中的Metric值为所描述网段上DR端口的开销
C . Network-Summary-LSA中的Metric值为所描述网段所在区域的ABR到达此网段的开销
D . Network-Summary-LSA中的Metric值为此LSA的发布者到达所描述网段的开销
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A new network has been configured using OSPF as the routing protocol. With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?（）
A . point-to-point
B . Backbone area 0
C . Broadcast multicast
D . Non-broadcast multi-access
E . The DR/BDR process is done for all interface type
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Why would a network administrator configure port security on a switch?（）
A . to prevent unauthorized Telnet access to a switch port
B . to limit the number of Layer 2 broadcasts on a particular switch port
C . to prevent unauthorized hosts from accessing the LAN
D . to protect the IP and MAC address of the switch and associated ports
E . to block unauthorized access to the switch management interfaces over common TCP port
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Why do large OSPF networks use a hierarchical design？（）
A . to confine network instability to single areas of the network.
B . to reduce the complexity of router configuration.
C . to speed up convergence.
D . to lower costs by replacing routers with distribution layer switches.
E . to decrease latency by increasing bandwidth.
F . to reduce routing overhead.
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You are a network administrator of a large investor relations company that uses a switchednetwork to carry both data and IP telephony services. Why should you carry voice traffic on aseparate VLAN？（）
A . IP phones require inline power and must be in separate VLAN to receive inline power
B . IP telephony applications require prioritization over other traffic as they are more delaysensitive
C . IP phones can only receive IP addresses through DHCP if they are in separate VLAN
D . The CDP frames from the IP phone can only be recognized by the switch if the phone is in anauxiliary vla
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Why would a network administrator configure port security on a switch（）。
A . to prevent unauthorized Telnet access to a switch port
B . to limit the number of Layer 2 broadcasts on a particular switch port
C . to prevent unauthorized hosts from accessing the LAN
D . to protect the IP and MAC address of the switch and associated ports
E . to block unauthorized access to the switch management interfaces over common TCP port
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在OSPF网络中，对于Network LSA（Type=2），下列描述正确的是（）。
A . Network LSA是由ABR生成的
B . 只有连接广播网络和NBMA网络的路由器才可能产生Network LSA
C . DR通过Network LSA来描述本网段中所有已经同其建立了邻接关系的路由器
D . Network LSA传递范围是其所属的整个自治系统
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在OSPF网络中，对于Network Summary（Type=3），下列描述正确的是（）。
A . 是由DR生成的
B . 是由ABR生成的
C . 这种类型的LSA描述了某条路由的目的地址、掩码、花费值等信息
D . 一条描述网段N1的第三类LSA的传递范围是自治系统内部网段N1的所属区域之外的所有其他区域（配置为不接收第三类LSA的区域除外）
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How could a large corporation with many specialized divisions benefit from using VLANs on their networks?（）
A . VLANs allow access to network services based on department, not physical location.
B . VLANs utilize packet filtering to enhance network security.
C . VLANs provide a low-latency, high bandwidth internetworking alternative.
D . VLANs provide a method of communication between IP addresses in large networks.
E . VLANs establish segmented broadcast domains in switched networks.
F . VLANs can greatly simplify adding, moving, or changing hosts on the network.
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Why is QoS important in a converged network?（）
A . Because data does not need to arrive intact, so data transfer rates can be variable
B . Because lost voice-data packets must be retransmitted
C . Because voice data packets should arrive quickly and sequentially, and with no lost data
D . Because voice data packets must follow a single dedicated path through the network
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在OSPF协议中Network LSA使用（）描述一个广播网段或者一个NBMA网段。
A . Link ID
B . Net mask
C . Attached Router list
D . Metric
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An etwork administrator has enabled OSPF across an NBMA network and has issued the command ip ospf network nonbroadcast. Given those facts, which two statements are true?（）
A . Interfaces will automatically detect and build adjacencies with neighbor routers
B . DR and BDR elections will not occur
C . DR and BDR elections will occur
D . The neighbor command is required to build adjacencies
E . All routers must be configured in a fully meshed topology with all other router
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Which two benefits of network integration would be critical to a large metropolitan hospital？（）
A . computerization of order entry for physicians
B . compliance with HIPPA requirements
C . improved bandwidth
D . greater fault tolerance
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Which of the following OSPF commands, when used together, will put the network 192.168.10.0/24 into OSPF area 0?（）
A . Router(config-router)# network 192.168.10.0 0.0.0.255 0
B . Router(config-router)# network 192.168.10.0 0.0.0.255 area 0
C . Router(config-router)# network 192.168.10.0 255.255.255.0 area 0
D . Router(config)# router ospf 0
E . Router(config)# router ospf 1
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Half of your network uses RIPv2 and the other half runs OSPF. The networks do not communicate with each other. Which two of these factors describe the impact of activating EIGRP over each separate part？ （）
A . EIGRP will not be accepted when configured on the actual RIPv2 routers.
B . OSPF will no longer be used in the routing table， because you only have EIGRP internal routes running.
C . OSPF will no longer be used in the routing table， because you only have EIGRP external routes running.
D . RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP external routes running.
E . RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP internal routes running.
F . OSPF database will have RIPv2 routes.
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两台MSR路由器RTA和RTB通过192.168.1.0/20网段互联，现在对两台路由器执行如下命令： [RTA]ospf1 [RTA-ospf-1]area 0 [RTA-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255 [RTB]ospf 100 [RTB-ospf-100]area 1 [RTB-ospf-100-area-0.0.0.1]network 192.168.1.0 0.0.0.255 从以上配置可以判断（）。
A . RTA和RTB可以建立OSPF邻居关系
B . RTA和RTB不可以建立OSPF邻居关系，若将areaID配置成一致，就可以建立OSPF邻居关系
C . RTA和RTB不可以建立OSPF邻居关系，若将OSPF进程号配置成一致，就可以建立OSPF邻居关系
D . RTA和RTB不可以建立OSPF邻居关系，必须将OSPF进程号和areaID都配置成一致，才可以建立OSPF邻居关系
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Which of the following options best justifies why a DNS server should be run in a large network system？（）
A . To use ftp and telnet
B . To perform NFS mounts
C . To make /etc/hosts files unnecessary
D . To reduce network traffic and save bandwidth
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Half of your network uses RIPv2 and the other half runs OSPF. The networks do not communicate with each other. Which two of these factors describe the impact of activating EIGRP over each separate part？（）
A . EIGRP will not be accepted when configured on the actual RIPv2 routers.
B . OSPF will no longer be used in the routing table， because you only have EIGRP internal routes running.
C . OSPF will no longer be used in the routing table， because you only have EIGRP external routes running.
D . RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP external routes running.
E . RIPv2 will populate its RIP database but not its routing table， because you only have EIGRP internal routes running.
F . OSPF database will have RIPv2 routes.
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Why do some people use social networking sites?
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如果定义了OSPF的进程后，要将172.16.7.0/24子网的接口能够使用OSPF作为路由协议，请完成配置：route ospf 1network 172.16.7.0 area 0
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Why could Japan seize its large market share of software products by the 1970s and the 1980s？
A．Because its products were cheaper and better.
B．Because its advertising was successful.
C．Because the US hardware industry was lagging behind.
D．Because it hired a lot of Indian software specialists.
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What do people fear the most and why What do people fear the most and why
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Crime is a very serious problem in Britain. One sort of crime which particularly worries people is juvenile delinquency—that is, crimes committed by young people. For some years juvenile delinquency had been increasing. There are two main sorts of juvenile crimes: stealing and violence. Most people do not understand why young people commit these crimes. There are, I think, a large number of different reasons.
These crimes are not usually committed by people who are poor or in need. Young people often dislike and hate the adult world. They will do things to show that they are rebels. Also in Britain today it is easier for young people to commit crimes because they have more freedom to go where they like and more money to do what they like.
There are two other possible causes which are worth mentioning. More and more people in Britain live in large towns. In a large town no one knows who anyone else is or where they live. But in the village I come from crimes are rare because everyone knows everyone else.
Although it is difficult to explain, I think the last cause is very important. Perhaps there is something with our society which encourages violence and crime. It is a fact that all the time children are exposed to films and reports about crime and violence. Many people do not agree that this influences the young people, but I think that young people are very much influenced by the society they grow in. I feel that the fault may be as much with our whole society as with these young people.
6. From the passage we know that many British people are confused about ().
A. the cause of juvenile crimes
B. the rise of the crime rate
C. the problem of crimes in their country
D. the various kinds of juvenile delinquency
7. One reason why young people in large cities are more likely to commit crimes is that ().
A. nobody knows anything about others
B. they are free to move
C. they live a better life
D. they need more money
8. According to the passage, which groups of the following young people are LEAST likely to commit crimes？
A. Those living in big cities
B. Those who are in need of help
C. Those who are very poor
D. Those living in the countryside
9. Unlike many others, the author holds that one important cause for juvenile delinquency is that().
A. young people nowadays do not like adult world
B. young people in Britain today are freer than before
C. too many young people have come to live in big cities
D. young people are influenced by crime and violence in films and newspapers
10.According to the passage, which is to blame for juvenile crimes, apart from the young people themselves？
A. The adult world
B. Their parents
C. The development of the cities
D. The society
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Mathilda is a Linux administrator on a large network.She does not have access to Linux
A．But she wants to automate the account creating process.Which of the following choices will best help Mathilda to simplify the process？()
B．Establish a default system profile file and use the user add-D command when creating new users.
C．Establish a default system profile file and use the user add-d command when creating new users.
D．Establish a default system profile file and use the user add-G command when creating new users.
E．Establish a default system profile file and use the user add-g command when creating new users.
