H19-301_V3.0 Free Practice Test

MACsec is an important feature to make sure security and reliability. Which one is MACsec corresponding standard?

1. A. 802.1ab
2. B. 802.1p
3. C. 802.1ae
4. D. 802.1at

Correct Answer: C
MACsec (Media Access Control Security)is a Layer 2 encryption protocol designed to secure Ethernet communications. It provides confidentiality, integrity, and replay protection for data transmitted over wired networks. The IEEE standard corresponding to MACsec is802.1AE, which defines the protocol's mechanisms for encrypting and authenticating Ethernet frames.Other options refer to unrelated standards:
* 802.1ab:Defines Link Layer Discovery Protocol (LLDP) for network discovery.
* 802.1p:Specifies priority tagging for Quality of Service (QoS). 802.1at:Defines Power over Ethernet Plus (PoE+). References:
HCSA-Presales-IP Network Study Guide, Section: "MACsec and Network Security." IEEE 802.1AE Standard Documentation.

In order to provide customers a fully-wireless experience, break down boundaries, and inspire enterprise innovation, Huawei developed a lot of advanced Wi-Fi technologies. In the face of common signal blind spots problem, which key technology does Huawei Wi-Fi solution use to achieve zero signal blind spot?

1. A. Dynamic frequency assignment (DFA)
2. B. Unique AI roaming algorithm
3. C. Unique dynamic-zoom smart antenna
4. D. 6 GHz frequency band

Correct Answer: C
Huawei Wi-Fi 6 solutionseliminate signal blind spotsusing their"Unique Dynamic-Zoom Smart Antenna"technology.
(C) True – Dynamic-Zoom Smart Antenna:
Automatically adjustsantenna beamformingbased on terminal location. Improves signal coverage and reduces interference in complex environments. Ensuresseamless roamingacross APs withstronger signal stability.
Other options:
(A) DFA (False): DFA optimizesfrequency selectionbut does not eliminate signal blind spots.
(B) AI Roaming Algorithm (False): Enhanceshandover between APs, but does not directly eliminate blind spots.
(D) 6 GHz Band (False): Providesmore spectrum, but coverage depends on the AP's antenna design.
Reference:HCSA-Presales-IP Network Official Study Guide, Huawei Wi-Fi 6 Technologies Section

What is the maximum packet loss rate allowed by A-FEC while ensuring smooth video playback in Huawei's SD-WAN solution?

1. A. 0.4
2. B. 0.2
3. C. 0.1
4. D. 0.3

Correct Answer: A
Understanding A-FEC (Adaptive Forward Error Correction):
A-FEC is a technology used in Huawei's SD-WAN solution to ensure smooth video playback even in the presence of packet loss. It adds redundant data to compensate for lost packets.
Maximum Packet Loss Rate:
A-FEC can tolerate up to40% packet loss (0.4)while maintaining smooth video playback. This ensures high-quality video streaming even in challenging network conditions. Conclusion:The correct answer is Option A, as the maximum packet loss rate allowed by A- FEC is 0.4.
References:
HCSA-Presales-IP Network V3.0 Training Material, Chapter 9: SD-WAN Solutions. Huawei SD-WAN Solution Brochure.