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

1. 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) 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 。
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) 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

2. 路由器 MSR-1 、 MSR-2 通过各自的 GigabitEthernet0/0 互连,同时两台路由器之间运行了 RIP ,目前 RIP 已经正确完成了远端路由学习,现在在 MSR-1 的路由表中看到如下的路由信息:
Destination/Mask Proto Pre Cost NextHop Interface
2.0.0.0/24 RIP 100 15 100.1.1.1 GE0/0
6.0.0.0/8 RIP 100 1 100.1.1.1 GE0/0
那么据此信息可以推测 ______ 。

A) 可以确认两台路由器之间运行是 RIPv1
B) 第一条目的网段为 2.0.0.0/24 的路由 Cost 已经达到最大值,是一条无效路由
C) 可以确认两台路由器之间运行的是 RIPv2
D) 第一条目的网段为 2.0.0.0/24 的路由依然是一条有效路由

3. 下面关于 OSI 参考模型各层功能的说法错误的是 ______ 。

A) 会话层负责数据格式处理、数据加密等。
B) 传输层的基本功能是建立、维护虚电路,进行差错校验和流量控制。
C) 物理层涉及在通信信道（ Channel )上传输的原始比特流,它定义了传输数据所需要的机械、电气功能及规程等特性。
D) 应用层负责为应用程序提供网络服务。
E) 网络层决定传输报文的最佳路由,其关键问题是确定数据包从源端到目的端如何选择路由。

4. 两台 MSR 路由器通过图示方式连接。

目前在两台路由器之间运行了 OSPF 。如今要在 RTA 上配置 ACL 来阻止 RTA 与 RTB 之间建立 OSPF 邻居关系,那么在 RTA 的 GE0/0 接口 outbound 方向应用如下哪些 ACL 是可行的 ?

A) acl number 3000 rule 0 deny udp destination-port eq 89 rule 5 permit ip
B) acl number 3000 rule 0 deny ip destination 224.0.0.5 0 rule 5 permit ip
C) acl number 3000 rule 0 deny ospf rule 5 permit ip
D) acl number 3000 rule 0 deny ip destination 224.0.0.5 0 eq 89 rule 5 permit ip

5. 根据用户的需求,管理员需要在交换机 SWA 上新建一个 VLAN ,并且该 VLAN 需要包括端口 Ethernet1/0/2 。
根据以上要求,需要在交换机上配置下列哪些命令 ?

A) [SWA]vlan 2
B) [SWA]vlan 1
C) [SWA-vlan1]port Ethernet1/0/2
D) [SWA-vlan2]port Ethernet1/0/2

Solutions: