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H3C GB0-372 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Campus Network Technologies | - LAN Switching
|
| Routing Technologies | - IP Routing
|
| Network Security & Services | - Security Fundamentals
|
| Spanning Tree and Redundancy | - STP Protocols
|
| Network Maintenance & Troubleshooting | - Fault Diagnosis
|
H3CSE-RS-SW Sample Questions:
1. 关于 MSTP 的计算过程,说法正确的有
A) CST 上的 Alternate 端口和 Backup 端口一定是域边界端口,一定不会处于 MST 域内
B) 在进行 CST 计算时,会优先考虑外部路径开销,只有在外部路径开销相同时才会比较内部路径开销
C) MSTP 的计算过程为,首先通过 MSTBPDU 进行 CST 和 IST 的计算,然后域内的交换机发送 MSTIBPDU 进行各实例生成树的计算
D) MSTP 中由于链路两端的端口在不同的实例中可能均为指定端口,所以链路两端的端口可能同时既会接收也会发送 MST BPDU
2. 图示是 RRPP 的组网应用客户局域网交换机 SWA 、 SWB 、 SWC 、 SWD 上构成 RRPP 环主环 1 ,交换机 SWB 、 SWC 和 SWE 构成子环 2 ,交换机 SWB 、 SWC 和 SWF 构成子环 3 如果交换机 SWE 为子环 2 的主节点, SWF 为子环 3 的主节点,交换机 SWB 为子环 2 和子环 3 的边缘节点为了消除 RRPP 双归属组网特定条件下产生广播风暴的缺陷,从上述信息可以得知
A) 如果交换机 SWA 连接交换机 SWB 的链路为 Down 状态,交换机 SWA 连接交换机 SWD 的链路为 Down 状态,交换机 SWB 上的边缘端口将被阻塞
B) 如果交换机 SWB 连接交换机 SWC 的链路为 Down 状态,交换机 SWB 上的边缘端口将被阻塞
C) 如果交换机 SWA 连接交换机 SWD 的链路为 Down 状态,交换机 SWB 上的边缘端口将被阻塞
D) 如果交换机 SWA 连接交换机 SWB 的链路为 Down 状态,交换机 SWB 连接交换机 SWC 的链路为 Down 状态,交换机 SWB 上的边缘端口将被阻塞
3. 客户六台交换机 SWA 、 SWB 、 SWC 、 SWD 、 SWE 、 SWF 通过局域网连接在一起,组成 RRPP 环在 SWB 上查看 RRPP 状态如下:
<SWB>dis rrpp verbose domain 1 Domain ID: 1
Ring ID: 1 Ring Level: 0
Node Mode: Transit Ring state: -
Enable Status: YesActive Status: Yes
Primary port: GigabitEthernet2/0/1 Port status: UP Secondary port: GigabitEthernet2/0/2 Port status: UP Ring ID :2
Ring Level: 1 Node Mode: Edge Ring state: -
Enable Status: YesActive Status: Yes
Common port: GigabitEthernet2/0/1 Port status: UP GigabitEthernet2/0/2 Port status: UP
Edge port: GigabitEthernet2/0/3 Port status: UP Ring ID: 3
Ring Level: 1
Node Mode: Edge Ring state: -
Enable Status: YesActive Status: Yes
Common port: GigabitEthernet2/0/1 Port status: UP GigabitEthernet2/0/2 Port status: UP
Edge port: GigabitEthernet2/0/4 Port status: UP
从上述信息可 & 得知
A) SWB 是 RRPP 子环 2 的传输节点
B) GigabitEthernet2/0/4 为 RRPP 子环 3 的边缘端口
C) SWB 共接入了 3 个子环
D) GigabitEthernet2/0/1 为 RRPP 子环 2 的边缘端口
4. 关于生成树协议中定时器的配置,说法正确的有
A) 应该将 HelloTime 调为最大值,将 Forward Delay 调为最小值,这样可以减少网络中的 Hello 消息数量,并且端口可以尽快进入转发状态
B) 不建议手工配置 Hello Forward Delay 和 Max Age ,交换机会通过网络直径值自动为定时器设置较优的值
C) 应该将 MaxAge 调为最小值,这样可以缩短 BPDU 的老化时间,及时发现链路故障
D) 适当的 Helloinme 值,可以满足降低生成树计算损耗的同时增强生成树的健壮性,取值过大或过小都会对生成树计算产生和网络的稳定产生影响
5. 某客户局域网络中希望部署 802.1X 来完善接入安全性,除了在 802.1X 接入设备上配置端口所属的初始 VLAN ,客户同时希望在接入控制方式为 port based 的端口上配置 Guest VLAN ,那么对于该方案的描述正确的是。(选择一项或多项)
A) 如果用户认证失败,其只能访问 Guest VLAN 里的资源
B) 如果用户认证失败,其只能访问用户初始配置的 VLAN 里的资源
C) 如果用户认证成功,该用户可能回到初始配置的 VLAN
D) 如果用户认证成功,端口会离开 Guest VLAN
Solutions:
| Question # 1 Answer: A,D | Question # 2 Answer: D | Question # 3 Answer: B | Question # 4 Answer: B,D | Question # 5 Answer: A,C,D |





