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H3CSE-WLAN Sample Questions:

1. 关于隐藏节点的描述中正确的是

A) 室分环境下为降低隐藏节点的影响可以在 AP 侧开启 RTS/CTS 功能
B) AP 与 AP 之间形成隐藏节点可能会导致 AP 发给 STA 的报文发生碰撞丢失
C) cts-to-self 是为解决隐藏节点问题的
D) 室外 AP+CPE 环境下为降低隐藏节点的影响可以在 AP 侧开启 RTS/CTS 功能

2. 在 H3CAP 设备隐含模式下,通过命令" display ar5drv[1l 2] statistics "可查看 AP 是否发送 Beacon 帧 . 如果通过此命令连续查看,发现 ________ 值有增长,则说明 AP 设备在正常发送 Beacon 帧。

A) Beacon BusyCnt
B) Beacon Statistics
C) Beacon ErrCnt
D) Beacon IntCnt

3. 以下属于运营商专款的无线控制器是

A) WN3520H-F
B) EWPXM1MAC0
C) WX2540H-F
D) EWPXM2WCMD0F

4. 利用无线桥接功能可实现 FAT AP 间的一对一或一对多的无线连接,为保证各链路的有效带宽,连接的 AP 数量不宜太多。以上说法是 _____.

A) 正确
B) 错误

5. 802.11 网络的介质访问机制为 ______ 。在此机制中,当发送方检测到媒体空闲时 _______ 。

A) CSMA/CA :等待 IFS 时间长度以后,启动一个定时器 Back-off Timer ,当定时器倒计时到零时开始发送报文。
B) CSMA/CD :等待 IFS 时间长度以后,立即发送数据,如果产生冲突则启动一个定时器 Back-off-timer ,当定时器倒计
C) CSMA/CA :等待 IFS 时间长度以后,立即发送数据,如果产生冲突则启动一个定时器 Back-off timer ,当定时器倒计时到零时再次重新发送报文。
D) CSMA/CD :等待 IFS 时间长度以后,启动一个定时器 Back-off Timer ,当定时器倒计时到零时开始发送报文。

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