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H3C GB0-371 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Campus Network Security | 15% | - 802.1X authentication - Storm control and traffic filtering - DHCP snooping and ARP protection - Port security and MAC address control |
| Spanning Tree Protocols | 15% | - MSTP optimization and protection - RSTP concepts and configuration - MSTP principles, regions and instances |
| VLAN and VLAN Extension Technologies | 20% | - QinQ technology and application - VLAN principles and configuration - Protocol-based VLAN and IP-subnet VLAN - VLAN mapping and VLAN translation |
| Network Management and Maintenance | 5% | - Traffic monitoring and troubleshooting - SNMP and RMON - Common fault diagnosis methods |
| High Availability Technologies | 20% | - VRRP protocol and deployment - Link aggregation (LACP/static) - BFD and fast failure detection - Device-level redundancy mechanisms |
| Campus Network Architecture and Design | 15% | - Core, aggregation and access layer characteristics - High-performance campus network requirements - Hierarchical network design model |
| Multicast in Campus Networks | 10% | - PIM-SM and PIM-DM basics - IGMPv1/v2/v3 operation - Multicast deployment and optimization |
H3C Constructing H3C High-Performance Campus Networks Sample Questions:
Question 1
如题图组网, SWA 、 SWB 和 SWC 启用 STP ,且 SWB 的 MAC 地址小于 SWA 的 MAC 地址如果拓扑收敛, SWB 的桥优先级设置为 0 ,则下列说法正确的有
A. SWA 会立即确定端口 E0/1 为根端口
B. SWC 收到 SWB 发送的配置 BPDU 后,不会马上进行更新,而会等待本地保存的配置 BPDU 老化后再进行更新
C. 默认 30 秒后拓扑会重新实现收敛
D. 优先级调整后, SWB 会立即从端口 E0/1 和 E0/2 发送以自己为根的配置 BPDU
Question 2
如图组网, SWB 和 SWC 启用 STP , SWC 为根, SWA 没有启用 STP 初始时链路 2 没有连接, PCB 可以将数据发到 PCA ,如果此时链路 1 故障,维护人员将链路 2 连接,则关于 PCB 到 PCA 数据传送业务的恢复过程说法正确的有（假设 PCA 不会主动发送数据)
A. SWB 的端口 E0/1 进入 Forwarding 状态引发拓扑改变过程,使得 MAC 地址老化时间缩短,所以 PCB 到 PCA 的业务恢复总共需要默认 45 秒的时间
B. SWA 端口 E0/1 链路中断后不会向 SWC 发送 TCN BPDU
C. SWB 的端口 E0/1 需要等待默认 30 秒进入转发状态,所以 PCB 到 PCA 的业务恢复总共需要默认 30 秒的时间
D. 由于 SWA 没有启用 STP ,所以业务恢复需要等待 SWC 的 MAC 地址老化,默认需要 300 秒的时间
Question 3
关于 RSTP 和 STP 的 BPDU 处理方式的对比,说法正确的有
A. RSTP 沿袭了 STP 中配置 BPDU 的发送方式,配置 BPDU 仅由根桥周期性发出
B. RSTBPDU 的老化时间由 Max age 减少为 3 个连续的 Hello Time 时长
C. RSTP 交换机收到配置 BPDU 后,对优先级向量的计算、比较方法和 STP 相同
D. RSTP 中,处于阻塞状态的端口在收到地优先的 BPDU 时,可以立即做出回应
Question 4
主机 PCA 的 IP 地址为 40.1.1.1 , MAC 地址为 0011.1111.11 ,接在交换机的 GigabitEthernet1/0/1 口,在交换机上配置了如下命令:
[H3C]vlan 10
[H3C-vlan10]quit
[H3C]vlan 20
[H3C-vlan20]protocol-vlan ipv4
[H3C-vlan20]quit
[H3C]vlan 30
[H3C-vlan30]quit
[H3C]mac-vlan mac-address 0022-2222-2222 vlan 30
[H3C]vlan 40
[H3C-vlan40]ip-subnet-vlan ip 40.1.1.0 255.255.255.0
[H3C-vlan40]quit
[H3C]interface GigabitEthernet 1/0/1
[H3C-GigabitEthernet1/0/1]port link-type hybrid
[H3C-GigabitEthernet1/0/1]port hybrid pvid vlan 10
[H3C-GigabitEthernet1/0/1]port hybrid vlan 10 20 30 40 untagged
[H3C-GigabitEthernet1/0/1]port hybrid protocol-vlan vlan 20 0
[H3C-GigabitEthernet1/0/1]port hybrid ip-subnet-vlan vlan 40
[H3C-GigabitEthernet1 /0/1 ]mac-vlan enable
配置完成后,可以判断 PCA 会加入
A. VLAN20
B. VLAN30
C. VLAN 10
D. VLAN40
Question 5
客户的局域网交换机 SWA 通过 GigabitEthenet 2/0/1 连接 SWB 、通过 GigabitEthernet 2/0/2 连接 SWC 且 SWA 交换机有如下配置:
[SWA]stp region-configuration
[SWA-mst-region]instance 0 vlan 1 to 100
[SWA-mst-region]instance 2 vlan 101 to 200
[SWA]smart-link group 1
[SWA-smlk-group1 ]protected-vlan reference-instance 0
[SWA-smlk-group1]port gigabitethernet 2/0/1 master
[SWA-smlk-group1 ]port gigabitethernet 2/0/2 slave
[SWA] smart-link group 2
[SWA-smlk-group2]protected-vlan reference-instance 2
[SWA-smlk-group2]port gigabitethernet 2/0/2 master
[SWA-smlk-group2]port gigabitethernet 2/0/1 slave
如果 SWA 、 SWB 、 SWC 连接口允许所有 VLAN 通过,从上述信息可以得知
A. SWA 交换机 VLAN2 流量将通过 Gigabitethernet 2/0/2 上行
B. SWA 交换机 VLAN102 流量将通过 GigabitEthe 2/0/2 上行
C. SWA 交换机 VLAN102 流量将通过 Gigabitethernet 2/0/1 上行
D. SWA 交换机 VLAN2 流量将通过 GigabitEthernet 2/0/1 上行
Solutions:
| Question 1 Answer: A,C,D | Question 2 Answer: A,B | Question 3 Answer: B,C,D | Question 4 Answer: D | Question 5 Answer: B,D |
