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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Automation Technologies and Practice | 17% | - Automation Foundation
|
| Topic 2: Bearer WAN Planning and Deployment | 15% | - Bearer Network Architecture
|
| Topic 3: Campus Network Planning and Deployment | 23% | - Campus Network Service Deployment
|
| Topic 4: Advanced Routing and Switching Technologies | 37% | - Advanced Routing Protocols
|
| Topic 5: WAN Interconnection Network Planning and Deployment | 8% | - WAN Service Optimization
|
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NEW QUESTION # 33
Huawei Open Programmability System (OPS) uses standard HTTP methods to access managed objects to manage network devices. Which of the following HTTP methods is used to configure the value of a network device ' s managed object?
Answer: B
Explanation:
Huawei Open Programmability System (OPS) is a programmable network architecture that uses RESTful APIs. In RESTful operations:
GET # Retrieve data
PUT # Configure/replace the value of a managed object
POST # Create new resources or perform non-idempotent operations
PATCH # Partially update a resource
When configuring or updating the value of a managed object (fully replacing it), PUT is the correct method.
Exact Extract - Huawei OPS and RESTful API Guide:
"The PUT method is used to configure the value of a managed object, replacing the entire object if it exists." Reference:
Huawei OPS Programming Guide
HCIE-Datacom Study Guide - Programmability and APIs Module
NEW QUESTION # 34
Exhibit:
A loop occurs because Spanning Tree Protocol (STP) is not enabled on the network. Which of the following symptoms may occur?
Answer: A,B,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.
References:
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 # 35
What is the security level for untrust zones in the USG Series firewalls? ( Radio).
Answer: A
NEW QUESTION # 36
The CPU was attacked by malicious traffic. Here are some of the following ways to prevent an attack:
Multi-select
Answer: A,D
NEW QUESTION # 37
Configure queue-based traffic shaping, which defaults to tailing if the queue length exceeds the cache size
Answer: A
NEW QUESTION # 38
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