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H3C GB0-191-ENU Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Services and Security | 15% | - Port security and device hardening - ACL and NAT configuration - DHCP and DNS services |
| Topic 2: IP Routing Technologies | 20% | - RIP protocol fundamentals and configuration - Static routing and default route - Introduction to OSPF basics |
| Topic 3: LAN Switching Technologies | 20% | - Ethernet principles and VLAN - Spanning Tree Protocol - VLAN trunking and link aggregation |
| Topic 4: WAN and Interconnection | 10% | - Network fault diagnosis - Common WAN access technologies - VPN and basic WLAN concepts |
| Topic 5: Computer Network Fundamentals | 20% | - Common network interfaces and cables - TCP/IP protocol suite and subnetting - OSI and TCP/IP models |
| Topic 6: H3C Device Basics | 15% | - Basic configuration and management - Command line interface and file system - Remote access and system maintenance |
H3C Constructing Small - and Medium - Sized Enterprise Network Sample Questions:
1. The RIP routing protocol has a timer, which defines the elapsed time for a route from the metric value to 16 until it is deleted from the routing table, then ______.
A) This timer is Timeout timer
B) This timer is Garbage-Collect timer
C) The timer defaults to 120s on the MSR router
D) The timer defaults to 180s on the MSR router
2. The following description about routing is correct ______. (Multiple choice)
A) A complete route must include at least mask, destination address, and next hop
B) The priority of the direct route cannot be modified manually
C) Route convergence means that the routes of the routers in the entire network are consistent
D) IGP is a routing protocol based on D-V algorithm
3. The IPv6 link-local address belongs to the ______ address type.
A) Broadcast
B) Multicast
C) Unicast
D) Anycast
4. Which of the following statements about CSMA/CD is correct is ______. (Multiple choice)
A) The station can start transmitting its frame only when the channel is free.
B) When a station connected to the Ethernet wants to transmit a frame, it must wait until the channel is free, that is, the carrier disappears.
C) CSMA/CD is applied in bus-type Ethernet, mainly to solve the problem of how to detect conflicts and ensure orderly transmission of data when multiple stations send data at the same time.
D) If two stations start transmitting at the same time, they will hear the signal conflict and pause the frame transmission.
5. As shown in the figure, four MSR routers are connected via Ethernet and serial interfaces, and OSPF is running in the network at the same time. The area is divided as shown in the figure.
It is known that the OSPF Cost value of all interconnection links is the same, except that the link between RTB and RTC is PPP, the other interconnection links are all Ethernet. So ______ . (Multiple choice)
A) If the link between RTD and RTC fails, RTD and RTC will immediately send LSA summary information to RTA and RTB without waiting for a fixed LSA update cycle
B) After the state is stable, the four routers have the same LSDB
C) There are at least three BDRs in the network
D) There are at least three DRs in the network
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A,B,C | Question # 3 Answer: C | Question # 4 Answer: A,B,C,D | Question # 5 Answer: A,C,D |

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