Huawei HCSA-Presales-IP Network V4.0 H19-301_V4.0 Exam Dumps: Updated Questions & Answers (September 2025)

M-LAG (Multi-Chassis Link Aggregation Group) is a technology that implements link aggregation across two or more independent physical devices (i.e., switches).

It enables downstream devices (such as servers or switches) to connect to two upstream devices as if they were one logical device.

This allows for:

Active-active forwarding (traffic load balancing)

Device-level redundancy (if one upstream device fails, the other continues forwarding traffic)

Eth-Trunk refers to link aggregation but generally within a single device.

Stack creates a logical switch from multiple physical switches, but it does not address inter-device aggregation in the same distributed manner as M-LAG.

LLDP (Link Layer Discovery Protocol) is a Layer 2 protocol for device discovery and has no role in link aggregation.

NAT HRP (Hot Standby High Reliability Protocol)is used in Huawei firewalls to synchronizeNAT sessions and state informationbetween theactive and standby firewalls. This enablesseamless failoverwithout session interruption, thereby improving thereliabilityof the firewall deployment.

A. VLANis used for logical segmentation

B. Securityis a broad concept, not a specific technology

C. Policiesgovern traffic handling but don't impact hardware reliability directly

Huawei’s"1-3-5" troubleshooting model, powered byknowledge graphs and AI-driven analysis, enables:

1-minute fault detection

3-minute root cause analysis

5-minute fault resolution or demarcation

This mechanism is part of Huawei’siMaster NCE-based intelligent O&M system, ensuring24/7 online service,proactive monitoring, andover 90% fault identification accuracy within minutes.

WheniMaster NCE (controller) and the analyzerare deployed on asingle node (combined deployment),certain advanced functions are limited or unavailabledue to resource constraints:

A. ERSPAN,C. MDC (Multi-Domain Control), andD. IFIT (In-situ Flow Information Telemetry)are still supported in basic or partial forms.

B. Multi-cloud simulationis aresource-intensive featurethat requiresindependent, dedicated controller and simulation nodesfor cloud interconnection emulation, and isnot supportedin combined deployments.

Option D is false. The AirEngine 6776I-X7TH is an indoor high-density AP and does not have built-in omnidirectional antennas; instead, it often uses external directional antennas, particularly when deployed in large venues like stadiums or exhibition centers.

Correct information for other options:

A: IP68 is indeed the highest industry standard for dust/water resistance in outdoor APs.

B: The AirEngine 8760R-X1 supports BLE 5.0 and can deliver PoE output to other devices (such as cameras).

C: The AirEngine 6760R-51/51E supports tri-radio with a combined rate of up to 10.75 Gbps.

In Huawei'sUSB-based SD-WAN deployment method, thecommon stepsinclude:

D. Plan sites and configure devices and the network: This is done first in the iMaster NCE system.

B. Generate a deployment file: After planning, the system generates the configuration file.

C. Perform onsite ZTP deployment: This file is copied to a USB drive and plugged into the device for ZTP.

A. Import initial configuration files in batchesis not part of USB-based deployment but applies tobulk deploymentmethods using the network or controller directly.

Huawei'sNAC (Network Access Control)solution on campus networks supportsmultiple authentication modes, including:

A. 802.1X authentication: Uses credentials with a supplicant (e.g., on a PC or phone)

C. Portal authentication: Redirects users to a login webpage

D. MAC address authentication: Authenticates based on the device's MAC address, often used for IoT or non-interactive devices

B. Wireless authenticationis not an authentication mode itself; rather, wireless clients can use802.1X or portalmethods over WLAN.

Huawei'sFireHunteris an advanced threat detection and response system designed toidentify and mitigate APT (Advanced Persistent Threat) attacks. It usessandboxing, behavioral analysis, and threat intelligence correlationto detect all stages of an APT attack, including:

A. Reconnaissance: The attacker collects info and identifies targets.

B. Data exfiltration: Collected data is extracted from internal systems.

C. Initial compromise: Through phishing emails.

D. Infiltration: User opens malicious attachment, leading to infection.

E. Remote control: Malware downloads a remote control tool (RAT), giving the attacker control.

FireHunter detects these activities based on behavior patterns, traffic anomalies, and sandbox execution results.

TheSolution Configuration Tool (SCT)supports:

Viewing products(A)

Comparing products(C)

Configuring product components(D)

However,B. Ordering the products directlyisnot availablein SCT. SCT is aconfiguration and solution design tool, not a purchasing platform. Orders must be placed through authorized Huawei sales channels or partner platforms.

Thefive-layer TCP/IP modelconsists of the following layers:

Application layer

Transport layer

Network layer

Data link layer

Physical layer

A. Application layer– Handles application-level protocols (e.g., HTTP, FTP).

B. Network layer– Handles logical addressing and routing (e.g., IP).

D. Transport layer– Manages end-to-end connections and reliability (e.g., TCP, UDP).

C. Radio layeris not part of the standard TCP/IP model — it's relevant in wireless physical-layer communication, butnot defined in the TCP/IP layering structure.