Which of the following statements are TRUE about Huawei's audio and video service experience assurance? (Select All that Apply)
Correct Answer:BCD
Overview of Audio and Video Service Assurance:
Huawei provides advanced mechanisms to ensure high-quality audio and video services in wireless networks, even under congestion.
Analysis of Each Statement:
Option A:This is incorrect. The correct default priority order isVI -> VO -> BE -> BK(Voice > Video > Best Effort > Background).
Option B:This is correct. Beacon frames can be used to instruct APs to suppress heavy- traffic users, ensuring fair resource allocation.
Option C:This is correct. Huawei's lab tests show that delays for voice and video services in congestion scenarios are56% lowerthan the industry average.
Option D:This is correct. The default scheduling priority order isVI -> VO -> BE -> BK. Option E:This is incorrect. Heavy-traffic services are not automatically suppressed; suppression requires explicit configuration.
Conclusion:The correct statements are Options B, C, and D. References:
HCSA-Presales-IP Network V3.0 Training Material, Chapter 8: WLAN Solutions.
Huawei AirEngine Product Documentation.
A higher antenna gain indicates stronger signals and more coverage. Therefore, an AP with a higher antenna gain which is within the specified range of country is preferred.
Correct Answer:A
Understanding Antenna Gain:
Antenna gain refers to the ability of an antenna to focus or direct radio frequency (RF) energy in a specific direction. Higher gain antennas provide stronger signals and extended coverage in the direction they are focused.
Impact on AP Selection:
In scenarios where long-range coverage or better signal strength is required, an AP with a higher antenna gain (within regulatory limits) is preferred.
However, it is important to ensure that the antenna gain complies with the regulatory requirements of the country where it is deployed.
Conclusion:The statement is TRUE because higher antenna gain improves signal strength and coverage, making such APs desirable for specific use cases.
References:
HCSA-Presales-IP Network V3.0 Training Material, Chapter 8: WLAN Solutions. Huawei AirEngine Product Documentation.
Which of the following statements is FALSE about RR in Huawei's SD-WAN solution?
Correct Answer:A
Understanding the Role of RR (Route Reflector):
In Huawei's SD-WAN solution, the Route Reflector (RR) plays a critical role in distributing routing information and ensuring efficient communication between CPEs (Customer Premises Equipment).
Analysis of Each Statement:
Option A:This is FALSE. The RR in Huawei's SD-WAN solution doesnot directly implement
communicationbetween SD-WAN networks and legacy MPLS networks. Instead, it focuses on distributing VPN routes and tunnel information within the SD-WAN overlay network. Communication with legacy MPLS networks typically requires additional integration mechanisms.
Option B:This is correct. The RR can be deployed on a physical AR router or as a virtualized instance (AR1000V vCPE).
Option C:This is correct. The RR can be deployed independently or co-located witha CPE at a site, depending on the network design.
Option D:This is correct. The RR distributes VPN routes and tunnel information between CPEs based on predefined VPN topology policies.
Conclusion:The FALSE statement is Option A. References:
HCSA-Presales-IP Network V3.0 Training Material, Chapter 9: SD-WAN Solutions. Huawei SD-WAN Solution Documentation.
A router forwards packets based on its routing table. To implement route-based packet forwarding, a router needs to obtain routes. Which of the following are common types of routes that a router can obtain?
Correct Answer:ACD
Arouterforwards packetsbased on its routing table, which contains different types of routes. Common types of routes include:
Dynamic route: Learned from routing protocols like OSPF, BGP, and RIP.
Direct route: Automatically generated when an interface is assigned an IP address. Static route: Manually configured by administrators to forward traffic to a specific destination.
A blackhole route (B)is not commonly used for forwarding but is instead a special type of route that discards traffic, preventing loops or attacks.
Reference:HCSA-Presales-IP Network Official Documentation – Routing Basics and Types of Routes
A local area network (LAN) connects computers, servers, and network devices in a geographic area, generally within several thousand square meters. A typical LAN can be a company's office network, an Internet caf??'s network, or a home network.
Correct Answer:A
ALocal Area Network (LAN)connectsdevices within a limited geographic areasuch as an office, campus, or home.
LANs typically include: Switches
Routers Access Points
Computers, printers, and other end devices
LANs operate using Ethernet or Wi-Fiand providehigh-speed communication and resource sharingwithin the network.
Unlike WANs (Wide Area Networks), LANs do not rely on carrier-leased connectionsand cover smaller areas.
Reference:HCSA-Presales-IP Network Official Documentation – LAN and Network Fundamentals