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

Comprehensive and Detailed Explanation:

Flood attacks (DoS/DDoS) overwhelm network resources, preventing normal users from accessing services.

Correct answers:

A. Exhaust available bandwidth→ Large amounts of traffic saturate the network.

B. Exhaust server-side resources→ High CPU/memory usage causes server crashes.

D. Exhaust network device resources→ Firewalls, routers, and switches become overloaded.

Why is C incorrect?

Controlling host rights is related to hacking, not flooding attacks.

HCIP-Security References:

Huawei HCIP-Security Guide → DoS/DDoS Attack Prevention

Comprehensive and Detailed Explanation:

Heartbeat linksbetween firewalls ensuresynchronization and failover.

Layer 2 or Layer 3 configuration depends on deployment needs, but there isno strict 30% bandwidth rulefor Eth-Trunk heartbeat links.

Why is this statement false?

The30% threshold condition is incorrect.

Eth-Trunk heartbeat links aretypically Layer 3 for better failover and routing control.

HCIP-Security References:

Huawei HCIP-Security Guide → Firewall High Availability Deployment

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

Comprehensive and Detailed Explanation:

iMaster NCE-Campus authentication supports multi-condition matching:

Account information(e.g., username, password, role-based policies).

SSID information(specific Wi-Fi network authentication).

Terminal IP address ranges(assigns different policies based on network segments).

Why is this statement true?

Multiple authentication conditions can be applied simultaneously to enforce flexible access control.

HCIP-Security References:

Huawei HCIP-Security Guide → iMaster NCE-Campus Authentication Policy

Comprehensive and Detailed Explanation:

Web rewriting in web proxy modifies web page contentforsecurity and access control.

Issues with web rewriting include:

A is true→ Server addresses can be hidden.

B is true→ Images may be misaligned due to rewriting.

C is true→ Fonts may be incomplete.

D is false→Web rewriting does not require Internet Explorer controls.

HCIP-Security References:

Huawei HCIP-Security Guide → Web Proxy and Web Rewriting

1. Virtual System → Services and routes can be isolated.

A virtual system (VS)in Huawei firewalls is afully isolated security instancewithin a single physical firewall.

Each virtual system hasseparate services, routing tables, policies, and security rules, ensuring full isolation between different users or tenants.

2. VPN Instance → Only route isolation can be implemented.

AVPN instance (VRF - Virtual Routing and Forwarding)providesroute isolationfor different customer networks butdoes not isolate services or security policies.

This is typically used inMPLS VPN deploymentswhere different customers share the same physical device but need isolated routing tables.

3. VPN Instance → VPN instances are automatically generated.

In someMPLS VPNorSDN-managed networks, VPN instances can beautomatically createdwhen customer configurations are pushed via controllers.

Dynamic routing protocols (e.g., BGP/MPLS VPN) can automatically generateVRF instancesbased on network policies.

4. Virtual System → An instance needs to be manually created.

Unlike VPN instances,virtual systems must be manually createdby an administrator on the firewall.

Each virtual system functions as acompletely independent firewall, requiring manual configuration ofinterfaces, policies, and routing settings.

Comprehensive and Detailed Explanation:

VLAN authorization in Portal authentication requires additional configuration.

To assign VLANs dynamically:

RADIUSmust return VLAN attributesafter authentication.

TheWAC (Wireless Access Controller) must be configured to support dynamic VLAN assignment.

Why is this statement false?

VLAN authorization requires RADIUS attributes and WAC configuration—it is not automatic.

HCIP-Security References:

Huawei HCIP-Security Guide → WLAN & Portal Authentication

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

1️⃣Understanding the Scenario:

Enterprise A and Enterprise B communicate over the Internet through an IPsec tunnel.

Firewall A and Firewall B establish the tunnelto secure traffic between the enterprises.

The network includes aSource NAT device, meaning IP headers may be modified.

The goal is to ensure confidentiality, integrity, and authentication of data transmission.

2️⃣Why ESP (Encapsulating Security Payload)?

ESP (Encapsulating Security Payload)provides:

Encryption (Confidentiality)→ Protects data from eavesdropping.

Integrity & Authentication→ Ensures data is not modified.

NAT Traversal Support→ Works through NAT devices, unlike AH (Authentication Header).

ESP is the preferred choice for VPN tunnels over the public Internet.

3️⃣Why Tunnel Mode?

Tunnel Mode encapsulates the entire original IP packet, including headers and payload,adding a new IP header.

Advantages of Tunnel Mode:

Protects both the data and the original IP addresses(important for communication over untrusted networks).

Used in site-to-site VPNswhere private network addresses need to be hidden.

HCIP-Security References:

Huawei HCIP-Security Guide→ IPsec VPN Fundamentals

Huawei USG Series Firewall Configuration Guide→ IPsec ESP vs. AH

RFC 4301 (Security Architecture for the Internet Protocol)→ ESP and Tunnel Mode Usage

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