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H3C Building H3C Wireless Network V8.0 Sample Questions:

1. 无线 RROP 功能以下描述正确的是 ?

A) 当网络中产生大量广播组播报文将会对无线业务带来很大的体验影响
B) RROP 功能是由 AP 起决定性作用的命令
C) RROP 功能是由 AC 起决定性作用的命令
D) rrop ul-arp attack-suppression 命令能够默认放通终端发给网关的 ARP

2. 无线设备显示的信号强度 Mean RSSI 可以直接体现出链路的质量,但实际由于底噪和环境、干扰相关,会时时变化；而 SNR 相对稳定（对于一个固定的环境和发射功率),可以认为和发射功率、设备使用的天线、设备距离、空间衰减等相关,但是当设备安装完成以后, SNR 往往相对比较固定。
下列关于底噪与 RSSI 的关系,描述正确的是。

A) 在固定的网络中,如果底噪增高,则 RSSI 会提高；反之如果底噪降低,则 RSSI 会降低；
B) 在固定的网络中,如果底噪增高,则 RSSI 会降低；反之如果底噪降低,则 RSSI 会提高；
C) 以上均不正确
D) 在固定的网络中,如果底噪降低,则 RSSI 会降低；反之如果底噪提高,则 RSSI 会提高；

3. 以下关于无线网桥说法正确的是:

A) 瘦 AP 和瘦 AP 不能相互桥接
B) 长距离桥接时一般配合高增益定向天线使用,并保证桥接两端 AP 连线之间的菲涅尔区无障碍物阻挡
C) 桥接链路可以级联,但由于每级桥接都会带来 50% 左右的链路带宽损耗并增大延迟,所以不建议多级桥接级联使用
D) 胖 AP 和瘦 AP 可以相互桥接
E) 胖 AP 和胖 AP 可以相互桥接

4. 一般来说,如果采用的调制方式越复杂,获取的发送速率 ________ ,能成功解调接收的无线信号覆盖范围 ________

A) 越低、越大
B) 越高、越大
C) 越高、越小
D) 越低、小低

5. 以下关于 debugging 命令使用说法正确的是 ______ 。

A) 应当使用 debugging 命令来查找故障,而不是用来监控正常的网络运行。
B) 由于 debugging 命令在各个输出方向对系统资源的占用情况不同。视网络负荷状况,我们应当在使用方便性（ info-center console debugging 命令)和资源耗费小（ info-center logbuffer debugging 命令)间做出权衡。
C) 在没有完全掌握某 debugging 命令的工作过程以及它所提供的信息前,不要轻易使用该 debugging 命令。
D) 仅当寻找某些类型的流量或故障并且已将故障原因缩小到一个可能的范围时,才使用某些特定的 debugging 命令。这样一方面可以减少 debugging 命令对设备性能的影响,另一方面减少了许多无用信息的输出,有利于更加迅速定位故障。
E) 尽量在网络使用的低峰期或网络用户较少时使用,以降低 debugging 命令对系统的影响性。

Solutions: