CCNA考试题库中英文翻译版及答案1[1]
1. What are two reasons that a network administrator would use access lists? (Choose two.)
1.出于哪两种理由，网络管理员会使用访问列表?
A. to control vty access into a router
A.控制通过VTY访问路由器
B. to control broadcast traffic through a router
B.控制广播流量穿越路由器
2.一个默认的帧中继WAN被分类为哪种物理网络类型?
A. point-to-point
A.点到点
B. broadcast multi-access
B.广播多路访问
C. nonbroadcast multi-access
C.非广播多路访问
D. nonbroadcast multipoint
D.非广播多点
E. broadcast point-to-multipoint
E.广播点到多点
Answer: C
3. A single 802.11g access point has been configured and installed in the center of a squar
A few wireless users are experiencing slow performance and drops while most users are o
at peak efficiency. What are three likely causes of this problem? (Choose three.)
3.一个802.11接入点被部署在一个方形办公室的中央，当大多数用户在大流量传输数
一些无线用户发现无线网络变得缓慢和出现丢包
A. mismatched TKIP encryption
B. null SSID
C. cordless phones
D. mismatched SSID
E. metal file cabinets
F. antenna type or direction
Answer: CEF
4. Refer to the exhibit. How many broadcast domains exist in the exhibited topology?
根据下图，图中的拓扑中存在多少个广播域?
A. one A.1
B. two B.2
C. three C.3
D. four D.4
E. five E.5
F. six F.6
Answer: C
5. Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two.)
5.根据下图，WLAN diagram决定了哪两个事实
A. The area of overlap of the two cells represents a basic service set (BSS).
A. 两个 cells的overlap的区域描述了一个basic service set
B. The network diagram represents an extended service set (ESS).
B. 网络描述了一个extended service set
C. Access points in each cell must be configured to use channel 1.
C. 再每个CELL中的AP必须被配置成使用channel 1
D. The area of overlap must be less than 10% of the area to ensure connectivity.
D. 为了确保连通性,重叠区域必须小于10%
E. The two APs should be configured to operate on different channels.
E. 两个访问点应该被配置成工作在不同的频道
Answer: BE
6. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router.Which of the following statements is true concerning this command?
6.路由器上输入命令frame-relay map ip 10.121.16.8 102 broadcast，以下选项正确的是?
A. This command should be executed from the global configuration mode.
A.该命令应该在全局配置模式下被执行
B. The IP address 10.121.16.8 is the local router port used to forward data.
B.IP地址10.121.16.8是本地路由器用来转发数据的接口
C. 102 is the remote DLCI that will receive the information.
C.102是远端的DLCI它将接受信息。
D. This command is required for all Frame Relay configurations.
D.这个命令要求被配置为所有的帧中继配置。
E. The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC.
E.这个广播选项允许数据包，例如rip更新信息，将会被转发通过PVC.
Answer: E
7. Which type of attack is characterized by a flood of packets that are requesting a TCP connection
to a server?
7.哪种类型的攻击的特点是发大量的TCP请求连接数据包到服务器?
A. denial of service A.拒绝服务
B. brute force B.强制叠加
C. reconnaissance C.监听
