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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1.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
E.255.255.255.254

2.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.

3.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
C.Switch-1会发送ARP请求到所有的接口,除了该数据的源接口
D.Switch-1会往默认网关发送该数据

5.多项选择题What functions do routers perform in a network (Choose two.)()。

A.packet switching
B.access layer security
C.path selection
D.VLAN membership assignment
E.bridging between LAN segments
F.microsegmentation of broadcast domai

6.单项选择题

如下图,两个路由器(Atlanta和Brevard)用串口连接起来。但是他们之间没有数据传输,已知Atlanta配置正确,下图给出部分配置,路由器Brevard上导致该问题的原因是()。

A.没有设置loopback命令
B.IP地址不正确
C.子网掩码不正确
D.串行链路封装不正确
E.最大传输单元(MTU)设置得太大
F.带宽设置和直连的接口不匹配

8.单项选择题At which OSI layer is a logical path created between two host systems()。

A.session
B.transport
C.network
D.data link
E.physical

9.多项选择题

根据下图,网络连接到路由器R2被汇总为一条192.168.176.0/21的路由,并发给R1。哪两个数据包目的地址R1会转发给R2?()

A.192.168.194.160
B.192.168.183.41
C.192.168.159.2
D.192.168.183.255
E.192.168.179.4
F.192.168.184.45

10.单项选择题What is the effect of using the service password-encryption comma()。

A.Only the enable password will be encrypted.
B.Only the enable secret password will be encrypted.
C.Only passwords configured after the command has been entered will be encrypted.
D.It will encrypt the secret password and remove the enable secret password fromthe configuration.
E.It will encrypt all current and future passwords.