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

Comprehensive and Detailed Explanation:

Authentication-free rules allow unauthenticated users to access essential services before login.

The following traffic must be allowed before authentication:

DNS traffic→ Users need to resolve domain names for the Portal page.

Portal page access→ The captive portal must be reachable.

RADIUS server communication→ Users must authenticate via RADIUS.

Why is this statement true?

Without these authentication-free rules, users would be unable to reach thePortal login page.

HCIP-Security References:

Huawei HCIP-Security Guide → Portal Authentication-Free Rules

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HCIP-Security References:

Huawei HCIP-Security Guide→ Bandwidth Management & Traffic Control Policies

Huawei QoS Configuration Guide→ Traffic Classification, Policing, and Queue Scheduling

1️⃣Step 1: Traffic Classification and Bandwidth Policy Matching

The firewallfirst classifies trafficusing predefined bandwidth policies.

These policies match traffic based on criteria such assource/destination IP, application type, and protocol.

This step ensures that each type of traffic is categorized correctly before applying bandwidth restrictions.

2️⃣Step 2: Traffic Processing Based on Bandwidth Policies

Once traffic is classified,the firewall enforces bandwidth limits and security actions:

Traffic exceeding the assigned bandwidth is discarded or throttled.

Service connection limits are enforced to prevent excessive connections per user or application.

3️⃣Step 3: Queue Scheduling and Priority Handling

If trafficexceeds the available bandwidth, the firewallprioritizes high-priority trafficusing queue scheduling mechanisms.

Techniques likeWeighted Fair Queuing (WFQ) and Priority Queuing (PQ)ensure thatcritical traffic (e.g., VoIP, business applications) is prioritized over less important traffic (e.g., downloads, streaming).

Comprehensive and Detailed Explanation:

Aggressive modeis a faster IKE Phase 1 negotiation method butdoes not support NAT traversal (NAT-T) with AH.

NAT-T only works with ESP, because:

AH includes the original IP header in its integrity check, which breaks when NAT modifies the IP address.

ESP works with NAT-Tsince it does not include the original IP header in its integrity check.

Why is this statement false?

AH does not support NAT-T, soAH+ESP cannot be used in NAT traversal scenarios.

HCIP-Security References:

Huawei HCIP-Security Guide → IPsec VPN NAT Traversal