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Test4Engine offers verified, authentic Huawei H12-891_V1.0 Real Questions and answers, which are essential for passing the HCIE-Datacom V1.0 (H12-891_V1.0). These questions and answers have been designed by Sitecore experts and can be easily downloaded on a PC, MacBook, or smartphone for comfortable and convenient learning.
| Section | Objectives |
|---|---|
| Network Security and QoS | - Security mechanisms
|
| Data Center and Virtualization Technologies | - VXLAN and overlay networks
|
| Enterprise Network Architecture | - Network design principles
|
| IPv6 and Advanced IP Technologies | - IPv6 deployment
|
| WAN and VPN Technologies | - MPLS fundamentals
|
| Network Automation and Programmability | - SDN and automation
|
| Routing and Switching Technologies | - IP routing protocols
|
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NEW QUESTION # 284
Huawei Open Programmability System (OPS) uses HTTP methods to access managed objects to manage network devices. HTTP is the most widely used network transmission protocol on the Internet. By default, which TCP port number is used?
Answer:
Explanation:
80
Explanation:
Understanding Huawei OPS and HTTP Communication
#What is Huawei OPS?
HuaweiOpen Programmability System (OPS)enablesAPI-based network automationusing standardHTTP requests.
It supportsNETCONF, RESTCONF, and RESTful APIsfordevice management.
#Why TCP Port 80?
Port 80is thedefault port for HTTP traffic.
Used forweb-based device management, API calls, and telemetry data exchange.
IfHTTPS (secure version) is used, the default port is 443.
Why is the Answer 80?
#HTTP operates on TCP port 80 by default.
#Huawei OPS uses HTTP APIs to manage network devices, making port 80 the standard option.
Real-World Application:
Cloud-Native Network Automation:UsesHTTP-based APIs for SDN controllers and automation tools.
Network Device Management:Enablesremote configuration and monitoring over HTTP APIs.
#Reference:Huawei HCIE-Datacom Guide - Open Programmability System (OPS) & HTTP Communication
NEW QUESTION # 285
In the following figure, all routers are running OSPF. Given this, which of the following statements is correct?
Answer: A
Explanation:
Comprehensive and Detailed
R2 is an Area Border Router (ABR), meaning it connects multiple OSPF areas (Area 0 and Area 1).
ABRs generate Router-LSAs for each area they belong to.
Since R2 is part of both Area 0 and Area 1, it must generate Router-LSAs (Type 1) for both areas.
R2 does not forward Router-LSAs between areas; instead, it generates Summary LSAs (Type 3) to exchange routing information between areas.
Thus, the correct answer is D.
๐ Reference: Huawei HCIE Datacom - OSPF LSA Types and ABR Behavior
NEW QUESTION # 286
You write the following Python code to invoke a RESTful API to obtain the token ID of iMaster NCE. Which of the following statements are correct?
import requests
response = requests.get("https://139.9.213.72")
print(response.json())
Error returned:
requests.exceptions.SSLError: HTTPSConnectionPool(host='139.9.213.72', port=18002): Max retries exceeded with url: /controller/v2/tokens (Caused by SSLError(CertificateError('hostname '139.9.213.72' doesn't match 'devzone.huawei.com'))) Options:
Answer: A,B,D
Explanation:
Error analysis:
The error SSLError and CertificateError indicates the server's SSL certificate's hostname doesn't match the IP address being used in the request.
This happens when a certificate is issued for a domain (like devzone.huawei.com), but the client accesses it via an IP address (139.9.213.72), causing a trust failure.
Correct statements:
A - โ
: The client doesn't trust the SSL certificate โ correct.
B - โ
: SSL verification fails due to hostname mismatch.
C - โ
: Disabling verification with verify=False bypasses the check (only recommended in lab/testing environments).
D - โ: Uses http instead of https, which changes protocol and defeats the purpose of SSL. Also uses POST without API path.
Correct answers: A, B, C
NEW QUESTION # 287
K company has two types of network services: UDP-based real-time video streaming services and TCP-based FTP download services. The company's network administrator often receives complaints that the FTP download speed is slow or unstable. What are the possible causes?
Answer: B,C
Explanation:
Comprehensive and Detailed
Key Factors Affecting FTP Performance:
Tail Drop and TCP Synchronization (A) โ
Tail Drop causes TCP global synchronization, reducing FTP speeds drastically when congestion occurs.
Since FTP is TCP-based, packet loss due to tail drop forces TCP retransmissions, further degrading performance.
Priority Preemption by Video Traffic (D) โ
UDP-based real-time video traffic is often prioritized over TCP-based traffic to avoid jitter and packet loss.
If video traffic has higher QoS priority, FTP bandwidth may be preempted, leading to slow speeds.
Incorrect Options:
โ Option B: PQ scheduling typically prioritizes latency-sensitive traffic (VoIP), but this scenario does not mention priority queuing for FTP.
โ Option C: No information about an explicit rate limit on FTP traffic.
๐ Reference: Huawei HCIE Datacom - QoS and Congestion Control
NEW QUESTION # 288
In RSTP , which port provides a backup path to reach the root node of the spanning tree? What state is the port in?
Answer: C
NEW QUESTION # 289
......
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