Your boss is learning a CCNA training ...

多项选择题 Your boss is learning a CCNA training course，refer to the exhibit.The access list has been configured on the S0/0 interface of router RTB in the out bound direction.Which two packets，if routed to the interface，will be denied？（）

access-list 101 denytcp192.168.15.320.0.0.15any eq telnet
access-list 101 permit ip any any

A.source ip address：192.168.15.5destination port：21
B.source ip address：，192.168.15.37destination port：21
C.sourcei p address：，192.168.15.41destination port：21
D.source ip address：，192.168.15.36destination port：23
E.source ip address：192.168.15.46destination port：23
F.source ip address：，192.168.15.49destination port：23

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1.多项选择题Which two statements about static NAT translations are true?（）

A.They are always present in the NAT table.
B.They allow connection to be initiated from the outside.
C.They can be configured with access lists,to allow two or more connections to be initiated from the outside.
D.They require no inside or outside interface markings because addresses are statically defined.

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2.单项选择题Which single access list statement will combine all four of these statements into a single statement that will have exactly the same effect（）。

A.access-list 10 permit 172.29.16.0 0.0.0.255
B.access-list 10 permit 172.29.16.0 0.0.1.255
C.access-list 10 permit 172.29.16.0 0.0.3.255
D.access-list 10 permit 172.29.16.0 0.0.15.255
E.access-list 10 permit 172.29.0.0 0.0.255.255

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3.单项选择题All WAN links inside the ABC University network use PPP with CHAP for authentication security. Which command will display the CHAP authentication process as it occur between two routers in the network?（）

A.show chap authentication
B.show interface serial0
C.debug ppp authentication
D.debug chap authentication
E.show ppp authentication chap

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4.单项选择题 根据下图，网络管理员如此配置的RA的原因是？（）

A.让students访问Internet
B.阻止students访问RA的命令提示符
C.阻止管理员访问RA的控制台
D.让administrators访问Internet
E.阻止students访问Internet
F.阻止students访问Admin的网络

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5.单项选择题A network administrator is troubleshooing an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checkeD.What command will display the required information?（）

A.Router# show ip eigrp adjacency
B.Router# show ip eigrp topology
C.Router# show ip eigrp interfaces
D.Router# show ip eigrp neighbors

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6.单项选择题What is one reason that WPA encryption is preferred over WEP?（）

A.A WPA key is longer and requires more special characters than the WEP key.
B.The access point and the client are manually configured with different WPA key values.
C.WPA key values remain the same until the client configuration is changed.
D.The values of WPA keys can change dynamically while the system is used.

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7.单项选择题在使用VLSM技术的网络中使用一个C类的IP地址，以下哪个子网掩码在点对点串行链路中是最不浪费地址空间的？（）

A.255.255.255.0
B.255.255.255.240
C.255.255.255.248
D.255.255.255.252
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8.单项选择题Which additional configuration step is necessary in order to connect to an access point that has SSID broadcasting disabled?（）

A.Set the SSID value in the client software to public.
B.Configure open authentication on the AP and the client.
C.Set the SSID value on the client to the SSID configured on the AP.
D.Configured MAC address filtering to permit the client to connect to the AP.

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9.单项选择题 根据下图，Switch-1需要往一台MAC地址为00b0.d056.efa4的主机发数据，Switch-1会如何处理这些数据？（）

A.Switch-1会丢弃该数据，因为它没有该MAC地址条目
B.Switch-1会防洪该数据到所有的接口，除了该数据的源接口
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D.Switch-1会往默认网关发送该数据

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10.单项选择题 根据下图，哪个交换机为打印机提供了生成树中的指定端口角色？（）

A.Switch1
B.Switch2
C.Switch3
D.Switch4

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