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H3CSE-WLAN Sample Questions:

1. 关于 ACK 确认以及重传机制的说法,正确的是。

A) 无线的重传报文会保持初始速率发送,不会降速传递,以减少占用空口的时间
B) 每个多播的无线帧,必须得到接收端的 ACK 回应,否则必须重传
C) 每个单播的无线帧,必须得到接收端的 ACK 回应,否则必须重传
D) 无线短帧丢失重传的最大次数缺省为 7 次

2. 在无线网络中, ESS 概念了一种接入服务,是站在整个网络的角度的抽象概念, BSSID 是 ESS 在某一个接入点（ AP )一种实体化表示。
以上说法是 ?

A) 错误
B) 正确

3. 首先。多频合路器要能支持需要的工作频段,且其通带频率越接近无线系统的工作频率越好,而没有多余的通频带,这样可以保证最佳效果 ; 其次,必须采用有滤波功能的合路器,端口间的隔离度一般要大于 80dB ,可以最大限度降低不同系统间的干扰。
以上说法正确是的。

A) 错误
B) 正确

4. 接收灵敏度与最大发射功率的概念是一致的,都是表达了相同的含义。

A) 错误
B) 正确

5. Wlan 工程中哪些部位的安装不规范,可能导造成对无线信号覆盖强度和质量的影响

A) 天线
B) 供电
C) 线缆（网线、馈线、电源线)
D) AP

Solutions: