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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. 如题图, SWA 、 SWB 、 SWC 和 SWD 启用了 STP , SWA 、 SWB 和 SWC 组成环路,拓扑稳定后,将 SWD 和 SWB 相连假设各链路开销相同,则关于 STP 的拓扑改变处理过程,以下说法正确的有

A) 如果 SWC 和 SWA 之间的链路中断,则 SWC 会从端口 E0/3 发出 TCN BPDU
B) 如果 SWB 和 SWC 之间的链路中断,则 SWB 和 SWC 均会从端口 E0/2 发出 TCN BPDU
C) SWB 会从端口 E0/2 发出 TCN BPDU
D) SWD 会从端口 E0/1 发出 TCN BPDU

2. 如图所示的网络中,交换机 SWA 为二层交换机,路由器 RTA 为各 PC 的网关在路由器 RTA 上做了如下配置 :
[RTA]interface Ethernet 0/0
[RTA-Ethernet0/0]ip address 10.10.10.1 255.255.255.0
[RTA-Ethernet0/0]interface ethernet 0/0.2
[RTA-Ethernet0/0.2]ip address 20.20.20.1 255.255.255.0
[RTA-Ethernet0/0.2]vlan-type dotlq vid 2
[RTA-Ethernet0/0.2]interface ethernet 0/0.3
[RTA-Ethernet0/0.3]ip address 30.30.30.1 255.255.255.0
[RTA-Ethernet0/0.3]vlan-type dotlq vid 3
在交换机 SWA 上完成相应配置后, PCA 、 PCB 和 PCC 都可以 ping 通自己的网关,下面交换机 SWA 端口 Ethernet1/0/4 的配置应为（选择一项或多项)

A) interfaceEthernet1/0/4 port link-mode bridge port link-type trunk port trunk permit vlan all port trunk pvid vlan 2
B) interfaceEthernet 1/0/4 port link-mode bridge port link-type trunk port trunk permit vlan all
C) interface Ethernet1/0/4 port link-mode bridge port link-type trunk port trunk permit vlan all port trunk pvid vlan 3
D) interface Ethernet 1/0/4 port link-mode bridge port link-type trunk port trunk permit vlan all port trunk pvid vlan 10

3. 在交换机 SWA 上执行 display interface Ethernet 1/0/2 命令后,输出信息如下 :
[SWA]display interface Ethernet 1/0/2
Ethernet1/0/2 current state: UP
PVID: 10
Mdi type: auto
Link delay is 0(sec)
Port link-type: trunk
VLAN passing: 1 (default vlan), 10
VLAN permitted: 1 (default vlan), 2-4094
Trunk port encapsulation: IEEE 802.1q
Port priority: 0
从以上输出可以判断

A) 端口 Ethernet1/0/2 只允许 VLAN 1 和 VLAN 10 的数据侦通过
B) 带有 VLAN20 标签的数据帧进入端口 Ethernet1/0/2 时将被丢弃
C) 带有 VLAN1 标签的数据帧离开端口 Ethernet1/0/2 时不会被剥离标签
D) 当前交换机存在的 VLAN 只有 VLAN1 和 VLAN10

4. 以下关于环网技术说法正确的是

A) RRPP （ Rapid Ring Protection Protocol ,快速环网保护协议)是一个专门应用于以太网环的网络层协议
B) RRPP 的收敛时间与环网上节点数无关,可应用于网络直径较大的网络
C) RRPR 需要专用硬 i 牛,因此成本较高
D) 以太网环技术日趋成熟且成本低廉,解决二层网络环路问题的技术有 RPR 和 RRPP

5. 在如图所示的交换网络中,交换机 SWA 上设置 VLAN10 为 Super VLAN , VLAN2 和 VLAN3 为 VLAN10 的 Sub VLAN ,端口 Ethernet1/0/3 为 Trunk 端口, PVID 为 VLAN1 ,允许所有 VLAN 通过；交换机 SWB 上创建 VLAN2~VLAN20 ,端口 Ethernet1/0/4 为 Trunk 端口, PVID 为 VLAN1 ,允许所有 VLAN 通过按照如图所示设置好各设备的 IP 地址后,可以判断 _ 下面说法正确的为

A) PCA 的报文从 SWA 的 Ethernet1/0/1 端口进入,从 Ethernet1/0/3 端口出来后所带的 VLANTag 为 VLAN 10
B) PCA 的报文从 SWA 的 Ethernet1/0/1 端口进入,从 Ethemet1/0/3 端口出来不带 tag
C) PCA 的报文从 SWA 的 Ethernet1/0/1 端口进入,从 Ethernet1/0/3 端口出来后所带的 VLANTag 为 VLAN2
D) PCA 的报文从 SWA 的 Ethernet1/0/1 端口进入,从 Ethemet1/0/3 端口出来所带 VLAN Tag VLAN 1

Solutions: