H19-301_V3.0 Free Practice Test

Which of the following statements are TRUE about network service quality?

1. A. Bandwidth, also called throughput, refers to the maximum number of data bits transmitted between two ends within a specified period (1 second) or the average rate at which specific data flows are transmitted between two network node
2. B. Bandwidth is expressed in bit/s.
3. C. Latency refers to the time required to transmit a packet from the transmit end to the receive end.
4. D. The packet loss rate refers to the percentage of total sent packets that are lost during transmission.
5. E. Jitter, also called latency variation, refers to the difference in latencies of packets in the same flow.

Correct Answer: ABCD
Network service quality is determined by several key metrics. Below is an analysis of each option:
Bandwidth : Bandwidth measures the maximum data transfer rate of a network link, expressed in bits per second (bit/s). It represents the capacity of the link to transmit data between two nodes.
Latency : Latency is the time it takes for a packet to travel from the source to the destination. Lower latency improves real-time communication and application performance. Packet loss rate : This metric indicates the percentage of packets that fail to reach their destination due to network congestion, errors, or other issues. High packet loss degrades user experience.
Jitter : Jitter refers to variations in packet arrival times, which can disrupt real-time applications like voice and video. Consistent latency is critical for smooth performance.
All four options are correct and accurately describe key aspects of network service quality. References:
Huawei Network Quality Metrics Guide, HCSA-Presales-IP Network Documentation.

Yet Another Next Generation (YANG) is a data modeling language. Which data content can YANG standardize?

1. A. NETCONF
2. B. SNMP
3. C. CLI
4. D. Telemetry

Correct Answer: A
YANG (Yet Another Next Generation) is adata modeling languageused to define the structure of configuration and state data manipulated by network management protocols. NETCONF (Network Configuration Protocol)is a network management protocol thatrelies on YANGto provide a standardized way to configure and manage network devices. YANG defines the structure, while NETCONF provides the transport mechanism to read, modify, and delete configurations.
Other options explained:
SNMP(Simple Network Management Protocol) is used for monitoring but doesnotuse YANG.
CLI(Command-Line Interface) is a manual method for device configuration andnot standardized by YANG.
Telemetryis used for real-time data streaming but isnot dependent on YANG. Reference:HCSA-Presales-IP Network Official Documentation – YANG & NETCONF Standardization

Which of the following AP models have 2.5GE uplink ports?

1. A. AirEngine 5760-51
2. B. AirEngine 6761-21
3. C. AirEngine 5761-21
4. D. AirEngine 6761-21T
5. E. AirEngine 5762-12

Correct Answer: ACD
Huawei'sAirEngineseries access points (APs) are designed for high-performance wireless networking. Some models include2.5GE uplink portsto support higher bandwidth requirements for modern applications like video streaming and IoT. The following models support 2.5GE uplink ports:
AirEngine 5760-51:High-performance Wi-Fi 6 AP with 2.5GE ports. AirEngine 5761-21:Compact Wi-Fi 6 AP with 2.5GE ports. AirEngine 6761-21T:Outdoor Wi-Fi 6 AP with 2.5GE ports.
TheAirEngine 6761-21andAirEngine 5762-12do not support 2.5GE uplink ports, making them unsuitable for scenarios requiring higher bandwidth.
References:
HCSA-Presales-IP Network Study Guide, Section: "AirEngine Series Features and Specifications."
Huawei AirEngine Product Documentation, Uplink Port Details.

Which of the following deployment modes are supported by AR routers?

1. A. USB-based deployment
2. B. DCN deployment
3. C. DHCP option-based deployment
4. D. Email-based deployment

Correct Answer: ABCD
Huawei'sAR routerssupport multiple deployment modes to simplify network setup and management:
USB-based deployment:Configuration files can be loaded via USB drives, enabling rapid deployment without manual intervention.
DCN deployment:Devices are automatically discovered and configured through Huawei's Device Control Network (DCN), streamlining large-scale deployments.
DHCP option-based deployment:Routers obtain configuration parameters from a DHCP server, reducing manual setup efforts.
Email-based deployment:Configuration files can be sent to devices via email, allowing remote provisioning.
These modes cater to different scenarios, ensuring flexibility and ease of deployment. References:
HCSA-Presales-IP Network Study Guide, Section: "AR Router Deployment Modes." Huawei AR Router Product Documentation, Deployment Options.

Which of the following AR models supports SRv6?

1. A. AR6300
2. B. AR6140E
3. C. AR8140
4. D. None of the above

Correct Answer: A
Understanding SRv6 Support in AR Routers:
SRv6 (Segment Routing over IPv6) is a next-generation networking technology that simplifies traffic engineering and improves scalability in WANs.
Analysis of Each Model:
AR6300:This high-end AR router supports SRv6, making it suitable for advanced SD-WAN and WAN deployments.
AR6140E:This model does not support SRv6. AR8140:This model also does not support SRv6.
None of the above:This is incorrect because the AR6300 supports SRv6. Conclusion:The correct answer is Option A, as the AR6300 supports SRv6. References:
HCSA-Presales-IP Network V3.0 Training Material, Chapter 4: Router Product Portfolio. Huawei AR Router Product Documentation.