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H3C GB0-342 Exam Syllabus Topics:

H3CSE-WLAN Sample Questions:

1. 根据无线的空口竞争机制（ CSMA/CA )工作原理,参与竞争的节点数量建议不超过 _____ 个,因为当竞争点到 ______ 个以后,空口的冲突会急剧上升,在实际开展业务时,为保证用户的有效带宽,建议每个 AP 下的并发用户数量不超过 ______ 个。

A) 64 ； 64 ； 48
B) 20 ； 20 ； 15
C) 40 ； 40 ； 30
D) 50 ； 50 ； 40

2. 关于无线网络勘测设计过程中的注意事项,以下说法正确的是

A) 在衡量墙壁等障碍物对于 AP 信号的穿透损耗时,需考虑 AP 信号入射角度。
B) 进行 AP 频点配置时,首先应对目标区域现场进行频率检测,对于覆盖区域内已有 AP 采用的信道,应尽量避免采用。
C) 在 WLAN 工程中,需要通过现场勘测的方式了解建筑物和周围各种物质的材质,并估测其对无线信号的影响,从而来确定 WLAN 设备的安全的安装位置。
D) 室外 AP 覆盖区频点配置时,为了实现 AP 的有效覆盖,避免信道间的相互干扰,在信道分配时遵守移动通信系统的蜂窝覆盖原则。

3. （单选)以下不符合轨道交通无线部署工程规范的是。

A) 天线平行与轨道安装,天线安装高度与车载天线错开
B) AP 放置在防水箱内,箱体以及各设备做好国定、散热、防水处理
C) 线缆统一使用扎带固定,并通过指定的路线走线
D) 天线避雷针角度小于 30° ,并引入接地线,线缆长度不超过 30m

4. 以下关于室外 AP 安装规范说法正确的是

A) AP 如放置于防水箱内,箱体必须固定牢固,保持垂直:箱体要保持通风以利于设备的散热:箱体可安装在楼顶墙体的内立面上,起到遮光挡雨的作用,进入防水箱的全部线缆需做防水弯,或采用下走线方式；防水箱也可用抱箍固定在用于安装天线的抱杆上。
B) 室外施工场所应易于固定器件,无阻挡；室外硬件安装所涉及的建筑墙体坚固完整。
C) AP 安装位置必须符合工程设计要求,如有 AP 的安装位置需要变更,必须征得设计单位和建设单位的同意,并办理变更手续。
D) 室外设备安装必须做好防雷、防水处理:室外施工需具有附加的防雷装置,如避雷针、地桩、接地排等: AP 表面要垂直于水平面,为接线的出线孔用防水塞封堵,各接头处应做好严格的防水密封措施。

5. 对于室外天线安装,天线的风阻可以不用考虑。

A) 错误
B) 正确

Solutions: