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H3CSE-WLAN Sample Questions:

1. 当 AP 中配置 SSID 加密类型为 WEP 加密（密码为 12345 ), MAC 层认证方式为 Open-system ,而客户端输入的密码为 54321 会出现以下哪些现象 ?

A) 客户端可以成功连接 AP ,但无法正常通信
B) 客户端可以成功连接 AP ,也可以正常通信,但数据报文为明文传输
C) 客户端无法成功连接 AP
D) 客户端会提示密码错误,要求重新输入

2. 关于无线网络漫游:下列说法正确的是:

A) 三层漫游时需要借助控制器 AC 才能实现 VLAN 信息的继承,所以 FAT 胖 AP 场景不支持三层漫游
B) 部分终端在当前 SSID 链路质量差的情况下会自动切换到其他 SSID 上,这也是漫游,只要不同 SSID 属于同一台 AC 管理,业务也不会中断
C) 漫游切换最终由 STA 发起, STA 会根据信号强度,链路质量综合权衡是否需要发起漫游
D) STA 在不同 AP 间漫游时,需要由网络侧保证 IP 地址 VLAN 信息等不变

3. 以下关于天线增益描述正确的是 ?

A) 天线的增益越大代表对信号的汇聚程度越高
B) 天线的增益越大覆盖的角度就越小
C) 天线的增益越大越好,使用大增益的天线可以获取更大的发射功率
D) 天线的选择应符合覆盖场景的要求,并非增益越大越好

4. 以下哪些技术为 802.11ac 引入的关键技术和改进点

A) MU-MIMO 技术
B) 80MHz 和 160MHz 信道捆绑
C) 同时支持 2.4G 和 5G
D) 256-QAM 调制

5. 关于 FIT AP 和控制器的数据转发,下列说法正确的是

A) 本地转发方式下, STA 的 DHCP 、 ARP 等报文直接由 AP 转换为 802.3 格式上送接入交换机
B) 集中转发方式下, AP 和接入交换机之间的外层以太网携带管理 VLAN 标签
C) 集中转发方式下, STA 的 DHCP 报文会通过隧道上送控制器集中处理
D) 集中转发方式下, AP 和接入交换机之间的无线数据报文是 802.11 格式,再通过隧道进行封装。

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