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H3C GB0-191 Exam Syllabus Topics:

H3C Constructing Small - and Medium - Sized Enterprise Network Sample Questions:

1. 要设置一个子网掩码使 192.168.0.94 和 192.168.0.116 不在同一网段,使用的子网掩码可能是 ______ 。（多选)

A) 255.255.255.192
B) 255.255.255.224
C) 255.255.255.248
D) 255.255.255.240

2. 在四台 MSR 路由器之间运行 OSPF 并划分区域,其连接以及划分方式如图。

已知网络中所有链路的 OSPF Cost 值都为 10 ,那么关于此图描述正确的是 ______ 。（多选)

A) Area 0 之间的链路故障后, RTA 访问 RTB 的路径为 RTA->RTD->RTC->RTB
B) RTA 访问 RTC 有两条等值路径,分别为 RTA->RTB->RTC 和 RTA->RTD-RTC
C) 网络中四台路由器都是 ABR (Area Border Router)
D) RTD 访问 RTB 会优先选择 RTD->RTA->RTB 路径

3. FTP 默认使用的数据传输端口是 ______ 。

A) 22
B) 21
C) 20
D) 23

4. 在开放系统互连参考模型（ OSI )中, ______ 以帧的形式传输数据流。

A) 数据链路层
B) 传输层
C) 网路层
D) 会话层

5. 以下说法正确的是 ______ 。（多选)

A) CSU （ Channel Service Unit ,信道服务单元):把终端用户和本地数字电话环路相连的数字接口设备。通常它和 DSU 统称为 CSU/DSU 。 CSU 设备包括计算机、协议翻译器以及多路分解器等设备。 DTE 设备包括这些
B) DTE （ Data Terminal Equipment ,数据终端设备)设备指位于用户网络接口用户端的设备,它能够作为信源、信宿或同时为二者。数据终端设备通过数据通信设备（例如,调制解调器)连接到一个数据网络上,并且通常使用数据通信设备产生的时钟信号。调制解调器和接口卡都是 DTE 设备的例子。是 DCE 设备的例子
C) DCE （ Data Circuit Terminating Equipment ,数据通信设备或者数据电路终端设备)设备及其与通信网络的连接构成了网络终端的用户网络接口。它提供了到网络的一条物理连接用于转发业务量,并且提供了一个用于同步 DCE 设备和 DTE 设备之间数据传输的时钟信号。
D) DSU （ Data Service Unit ,数据服务单元):指的是用于数字传输中的一种设备,它能够把 DTE 设备上的物理层接口适配到 T1 或者 E1 等通信设施上。数据业务单元也负责信号计时等功能,它通常与 CSU 一起提及,称作 CSU/DSU 。

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