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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Routing and Switching Technology | 37% | - OSPF
|
| Topic 2: WAN Interconnection Network Planning and Deployment | 8% | - MPLS VPN
|
| Topic 3: Network Automation | 17% | - NCE (Network Cloud Engine)
|
| Topic 4: Campus Network Planning and Deployment | 23% | - Campus Network Architecture
|
| Topic 5: Bearer WAN Planning and Deployment | 15% | - SR (Segment Routing)
|
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NEW QUESTION # 142
Exhibit:
A loop occurs because Spanning Tree Protocol (STP) is not enabled on the network. Which of the following symptoms may occur?
Answer: B,C,D
Explanation:
When Spanning Tree Protocol (STP) is not enabled on a network, loops can occur in Layer 2 Ethernet networks, leading to various network issues. STP is designed to prevent loops by blocking redundant paths, and its absence can cause broadcast storms, MAC address table instability, and resource exhaustion. Let's analyze each option in the context of Huawei HCIE Datacom documentation and network behavior:
A . A loop alarm is generated on the LAN switch.
This option is incorrect. Huawei switches, as per HCIE Datacom standards, do not automatically generate a specific "loop alarm" unless configured with loop detection features (e.g., Huawei's Loop Detection Protocol or similar mechanisms). Without STP or loop detection enabled, the switch may not explicitly generate an alarm for a loop; instead, it will exhibit symptoms like broadcast storms or flapping MAC entries. Therefore, this is not a direct symptom of an STP-less loop. Reference: Huawei HCIE Datacom V3.0 Training Materials, Section 4.2 - Spanning Tree Protocol and Loop Prevention.
B . CPU usage is too high.
This option is correct. When a loop occurs without STP, broadcast packets (and sometimes multicast or unknown unicast packets) circulate endlessly in the network. This leads to excessive processing by switches as they handle these packets, resulting in high CPU usage. Huawei switches, as described in HCIE Datacom documentation, can experience CPU overload due to continuous packet forwarding and processing in a looped environment. Reference: Huawei HCIE Datacom V3.0, Chapter 5 - Switch Performance and Loop Management.
C . MAC entries flap.
This option is correct. In a loop without STP, switches continuously receive frames from multiple ports, causing MAC address tables to update repeatedly as the same MAC address appears on different ports. This "flapping" of MAC entries destabilizes the network and can lead to incorrect frame forwarding. Huawei HCIE Datacom emphasizes MAC address table stability as a critical aspect affected by loops, as outlined in Section 4.3 - Ethernet Switching and Loop Mitigation. Reference: Huawei HCIE Datacom V3.0, Section 4.3.
D . Host receives a large number of broadcast packets.
This option is correct. A loop without STP causes broadcast packets to circulate indefinitely, creating a broadcast storm. Hosts connected to the network will receive an overwhelming number of these packets, potentially leading to performance degradation or even network timeouts. This is a well-documented symptom in Huawei HCIE Datacom training, specifically in discussions about loop prevention mechanisms. Reference: Huawei HCIE Datacom V3.0, Chapter 4 - Layer 2 Loop Prevention.
Thus, the correct symptoms of a loop occurring due to the absence of STP include high CPU usage, flapping MAC entries, and hosts receiving a large number of broadcast packets. Option A is incorrect as it requires specific loop detection configuration, which is not implied in the question.
Reference:
Huawei HCIE Datacom V3.0 Training Materials, Sections 4.2, 4.3, and 5 - Spanning Tree Protocol, Loop Prevention, and Switch Performance.
Huawei Official Documentation on Ethernet Switching and Loop Management, available in HCIE Datacom Certification Guides (2023 update).
NEW QUESTION # 143
OSPFv2 is an IGP running on IPv4 networks, whereas OSPFv3 is an IGP running on IPv6 networks. OSPFv2 and OSPFv3 have similar LSA types, but their LSA functions are slightly different. Which of the following is not an OSPFv3 LSA type?
Answer: B
Explanation:
Comprehensive and Detailed
OSPFv2 (for IPv4) and OSPFv3 (for IPv6) LSAs differ in function and naming conventions.
Key Differences in OSPFv3 LSAs:
OSPFv3 does not use ASBR-Summary-LSA. Instead, it introduces new Inter-Area Prefix LSAs (Type 3) and Inter-Area Router LSAs (Type 4).
OSPFv2 ASBR-Summary-LSA (Type 4) is replaced in OSPFv3 by Inter-Area Router LSA (Type 4).
OSPFv3 LSA Types:
✔ Router-LSA (Type 1) - Describes router interfaces and links.
✔ Network-LSA (Type 2) - Describes broadcast network links.
✔ Inter-Area Prefix LSA (Type 3) - Replaces Summary LSAs for routes.
✔ Inter-Area Router LSA (Type 4) - Replaces ASBR Summary LSAs.
✔ AS-External LSA (Type 5) - Describes external routes (same as OSPFv2).
Since ASBR-Summary-LSA (Type 4) does not exist in OSPFv3, the correct answer is A.
📖 Reference: Huawei HCIE Datacom - OSPFv3 LSA Types
NEW QUESTION # 144
Huawei Open Programmability System (OPS) uses standard HTTP methods to access managed objects and manage network devices.
Which of the following HTTP methods is used to configure the value of a network device's managed object?
Answer: D
Explanation:
Comprehensive and Detailed
✔ Huawei OPS (Open Programmability System) follows RESTful API principles, using HTTP methods for device management.
✔ HTTP Methods Used in OPS:
✅ GET → Retrieves data from the device.
✅ POST → Creates new data/configurations.
✅ PUT → Replaces entire configuration objects.
✅ PATCH → Updates specific fields of a configuration object. ✅ (Correct Answer) Since PATCH is used for modifying specific values in managed objects, the correct answer is D.
📖 Reference: Huawei HCIE Datacom - RESTful API Operations in Huawei OPS
NEW QUESTION # 145
When the load is an ICMPv6 message, what is the numeric value of the Next Header field in the IPv6 header if the presence of an extended header is not taken into account?
Answer: A,B,C
NEW QUESTION # 146
iMaster NCE-Campus restricts RESTful APIs. If a client sends a GET request that invokes a RESTful API to obtain site information from iMaster NCE-Campus, which of the following fields should be included in the request header?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth
When invoking RESTful APIs in iMaster NCE-Campus, the client must include the ACCESS-TOKEN in the request header to authenticate the request.
The ACCESS-TOKEN is obtained through authentication and is required for API access control.
The correct format in the HTTP header is:
Authorization: Bearer ACCESS-TOKEN
Other formats like ACCEPT-TOKEN, X-ACCEPT-TOKEN, and X ACCESS TOKEN are not recognized or valid for iMaster NCE-Campus API requests.
Therefore, the correct answer is A.
Reference:
Huawei iMaster NCE-Campus API Development Guide
Huawei HCIE Datacom Official Certification Guide
NEW QUESTION # 147
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