Pass the Huawei HCIP-Security H12-725_V4.0 Questions and answers with ExamsMirror

Comprehensive and Detailed Explanation:

Threshold settings in firewalls allow administrators to define:

Alarm threshold→ When exceeded, logs are generated.

Block threshold→ When exceeded, the action is blocked.

Why is B false?

The alarm threshold does not block traffic; it only generates logs.

Only the block threshold enforces blocking actions.

HCIP-Security References:

Huawei HCIP-Security Guide → HTTP Traffic Control

Comprehensive and Detailed Explanation:

Inbound bandwidth= Trafficenteringthe firewall.

Outbound bandwidth= Trafficleavingthe firewall.

Correct answer:

A. Private → Public traffic is controlled by outbound bandwidth.

Why are the other options incorrect?

Bis incorrect because public → private traffic is controlled byinbound bandwidth, not outbound.

Cis incorrect because inbound bandwidth does not apply to private → public traffic.

Dis incorrect because public → private traffic is controlled by inbound bandwidth.

HCIP-Security References:

Huawei HCIP-Security Guide → Firewall Virtual System Bandwidth Control

Comprehensive and Detailed Explanation:

Network Access Control (NAC) and AAA work together for secure network access.

Key functions:

A. AAA handles user-to-device authentication.

B. NAC handles device-to-server authentication.

C. NAC supports 802.1X, MAC authentication, and Portal authentication.

D. AAA enforces authentication, authorization, and accounting.

Why are all options correct?

Each option correctly describes a function of NAC or AAA.

HCIP-Security References:

Huawei HCIP-Security Guide → NAC & AAA Integration

Comprehensive and Detailed Explanation:

SYN scanning is a stealthy technique used to identify open ports on a target system without fully establishing a TCP connection.

How SYN scanning works:

The scanner sends aSYN packetto the target port.

The target responds based on the port state:

SYN-ACK → Port is open(Correct - D).

RST → Port is closed(Correct - A).

No response → The host does not exist, or a firewall is blocking it(Correct - B).

The scanner doesnot send an ACK(unlike a full TCP connection). Instead, it sends anRSTto avoid detection.

Why is C incorrect?

In SYN scanning, the scanner does NOT send an ACK to complete thehandshake. Instead, it sends an RST to abort the connection.

HCIP-Security References:

Huawei HCIP-Security Guide → SYN Scanning Techniques

Comprehensive and Detailed Explanation:

Hot standby networkingensureshigh availabilityby keeping a backup firewall ready in case of failure.

Two main modes exist:

Active/Standby Mode→ One firewall is active, and the other remains standby. Configuration is synchronized fromactive → standby.

Load-Sharing Mode→ Both firewallsprocess traffic simultaneously, improving performance.

Why is A false?

InLoad-Sharing Mode, both firewalls are active, butconfiguration synchronization does not cause conflicts. Instead, the firewalls synchronize states properly.

Why is D false?

InLoad-Sharing Mode, configuration is always synchronizedfrom the active firewall to the standby firewall, not the other way around.

HCIP-Security References:

Huawei HCIP-Security Guide → Hot Standby Configuration

Huawei USG Firewalls High Availability Guide

Comprehensive and Detailed Explanation:

Eth-Trunk (Ethernet Trunking)aggregates multiplephysical linksinto asingle logical interface, improvingbandwidth and redundancy.

Manual mode limitations:

Manual mode does NOT detect link faults or incorrect connections—it only detects link disconnections.

To detectlink faults,LACP (Link Aggregation Control Protocol) modeis required.

Why is D false?

Manual mode canonly detect link disconnectionsbutnot link faults or incorrect connections.

HCIP-Security References:

Huawei HCIP-Security Guide → Eth-Trunk Configuration

Huawei USG6000 Firewalls Link Aggregation Guide

Comprehensive and Detailed Explanation:

Virtual system resource allocation can bemanual or shared.

Manual allocationrequires configuring aresource class, defining aquota, and binding it to a virtual system.

Why is D false?

Quota-based resources are not automatically allocated.

An administrator must defineresource quotas.

HCIP-Security References:

Huawei HCIP-Security Guide → Virtual System Resource Allocation

Comprehensive and Detailed Explanation:

Bandwidth policies use a hierarchical structure(Parent → Child).

Child policies must follow parent policiesin terms of bandwidth restrictions.

Why is C false?

A parent and childcan use the same bandwidth profile.

The firewall allowsinheritanceof bandwidth settings.

HCIP-Security References:

Huawei HCIP-Security Guide → Bandwidth Management and Policy Configuration

1️⃣Understanding HTTP Flood Attacks:

An HTTP flood attackis a type of DDoS attack where an attacker sendsa large number of HTTP requeststo a target server, overloading its resources.

Attackers often use botnets or spoofed IP addressesto send forged HTTP requests, making it difficult to differentiate between legitimate and malicious traffic.

2️⃣What is Happening in the Figure?

TheAnti-DDoS devicedetects an abnormally high number of HTTP requests from certain IPs.

Itchallenges suspicious clientsby requiring them to complete an authentication step (such as entering a verification code).

Legitimate users can pass the authentication and get whitelisted, while bots and attackers fail to respond and are blocked.

3️⃣Why is "Enhanced Mode" the Correct Answer?

Enhanced Modeis an advancedsource IP detection technologythat uses verificationcodes or JavaScript challenges to distinguish real users from bots.

Key features of Enhanced Mode:

Verification challenge(e.g., CAPTCHA, JavaScript check).

Whitelisting of verified usersto prevent further verification delays.

Blocks attack sources that fail to respond to verification.

In the figure, the systemprompts suspicious users to enter a verification codebefore allowing further access.

Attackers typicallydo not respond, while legitimate userscomplete the challenge and continue browsing normally.

HCIP-Security References:

Huawei HCIP-Security Guide→ HTTP Flood Attack Protection

Huawei Anti-DDoS Solution Guide→ Source IP Detection Methods

Huawei WAF Documentation→ Enhanced Mode for Web Attack Mitigation

Comprehensive and Detailed Explanation:

Firewalls with advanced security features(such asIPS, Antivirus, and File Filtering) candetect and respond to file anomalies.

Actions that can be taken when an anomaly is detected:

A. Alarm→ Generates a log entry and notifies the administrator.

C. Block→ Prevents the file from being transferred.

D. Delete attachment→ Removes malicious attachments from emails.

Why is B incorrect?

Allowing a detected malicious file is not a valid security response.

HCIP-Security References:

Huawei HCIP-Security Guide → File Filtering & IPS Protection