H12-725_V4.0 Exam Dumps - HCIP-Security V4.0 Exam

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:

Portal authentication requires active session monitoring.

User logout can be triggered by multiple methods:

A. Portal server logout→ The Portal system forcefully logs out a user.

B. Authentication server logout→ The authentication system revokes access.

C. User-initiated logout→ The user manually logs out via a Portal page.

D. Access device logout→ If the firewall detects inactivity, it can remove the session.

Why are all options correct?

Each method can trigger a user logout in Portal authentication.

HCIP-Security References:

Huawei HCIP-Security Guide → Portal Authentication Logout Mechanisms

Comprehensive and Detailed Explanation:

PBR (Policy-Based Routing)allows traffic to be forwarded based on specific policies.

All options are correctsince Huawei PBR can match:

A→ Source IP address

B→ Source security zone

C→ Source MAC address

D→ Application

HCIP-Security References:

Huawei HCIP-Security Guide → Policy-Based Routing Configuration

Comprehensive and Detailed Explanation:

Health checkensuresnetwork reliabilityby detecting link failures.

Supports multiple protocols: ICMP, TCP, UDP, DNS, and HTTP.

Works with PBR (Policy-Based Routing):

Health checkmonitors link status, and if a failure is detected,PBR dynamically switches to an alternate path.

Why is C false?

Health check CAN be used with PBRto ensure traffic is routed via healthy links.

HCIP-Security References:

Huawei HCIP-Security Guide → Health Check Configuration

Understanding 802.1X Authentication in Wired Networks:

802.1X is a port-based network access control (PNAC) protocolthat requires aLayer 2 connectionbetween thesupplicant (PC), the authenticator (switch), and the authentication server (e.g., RADIUS server).

In wired networks,802.1X authentication occurs at the Ethernet switch (Layer 2 device), which enforces authenticationbefore allowing network access.

Why Must the Network Be Layer 2?

802.1X authentication operates at Layer 2 (Data Link Layer) before any IP-based communication (Layer 3) occurs.

If the authentication device and user terminal were on different Layer 3 networks, the authentication packets (EAPOL - Extensible Authentication Protocol Over LAN)would not be forwarded.

In the figure, the authentication control point is at theaggregation switch, which means thePC and switch must be in the same Layer 2 domain.

Components of 802.1X Authentication in the Figure:

Supplicant (PC)→ The device requesting network access.

Authenticator (Aggregation Switch)→ The switch controlling access to the network based on authentication results.

Authentication Server (iMaster NCE-Campus & AD Server)→ Verifies user credentials and grants or denies access.

Layer 2 Connectivity Requirement→ ThePC must be in the same Layer 2 networkas theAuthenticatorto communicate via EAPOL.

Why "TRUE" is the Correct Answer:

802.1X authentication is performed before IP addresses are assigned, meaning it can only operate in a Layer 2 network.

EAPOL (Extensible Authentication Protocol Over LAN) messages are not routableand must stay within a single Layer 2 broadcast domain.

In enterprise networks,VLAN-based 802.1X authentication is often used, where authenticated users are assigned to a specific VLAN.

HCIP-Security References:

Huawei HCIP-Security Guide→ 802.1X Authentication in Enterprise Networks

Huawei iMaster NCE-Campus Documentation→ Authentication Control and NAC Deployment

IEEE 802.1X Standard Documentation→ Layer 2 Network Authentication