Free Huawei H12-711_V4.0 Practice Exam with Questions & Answers | Set: 4

Huawei firewalls support creating multiple sub-interfaces on a single physical interface such as GE0/0/1 so that one physical link can carry traffic for multiple VLANs. Each sub-interface is configured with an 802.1Q VLAN tag, which allows it to logically represent one VLAN or one Layer 3 gateway interface for that VLAN. This design is commonly used when the firewall connects to a switch through a trunk and needs to provide routing and security control for several VLANs simultaneously.

The statement is incorrect because sub-interfaces can be added to security zones. A security zone is a logical security domain used for policy enforcement, and Huawei firewalls allow both physical interfaces and logical interfaces (including VLAN sub-interfaces) to be assigned to zones. This is essential for implementing interzone security policies between VLANs. For example, if two VLANs are mapped to two different sub-interfaces, placing each sub-interface into a different zone allows the firewall to apply access control, inspection profiles, and NAT based on zone-to-zone rules. Therefore, the claim that sub-interfaces cannot be added to security zones is false.

Explanation From HCIA-Security documents:

PKI is designed to solve trust and security problems in digital communications by using certificates, public/private keys, and signature mechanisms. It helps parties verify each other’s identities through certificate-based authentication, so B is a classic problem PKI addresses. PKI also enables secure key distribution and supports security protocols that provide confidentiality and integrity , which helps protect data against eavesdropping and tampering during transmission, so C is also within PKI’s scope. In addition, PKI supports digital signatures and non-repudiation-style evidence, which can replace or supplement paper receipts by creating verifiable transaction records, making D something PKI can help with in electronic transactions.

However, network congestion and service degradation due to heavy traffic (A) is a performance and capacity issue. PKI does not reduce traffic load, increase bandwidth, optimize routing, or fix server resource bottlenecks. Those problems are handled through network engineering measures such as QoS, scaling, load balancing, and capacity planning—not by PKI. Therefore, the correct answer is A .

This statement is correct because it accurately reflects the basic objective of information security. In HCIA-Security, information security is concerned with protecting information assets and the systems that store, process, and transmit them. These assets include hardware devices, software platforms, network resources, and the data itself. The purpose is to prevent unauthorized access, accidental loss, malicious tampering, disclosure, destruction, or interruption of services.

Information security is not limited to confidentiality alone. It also includes maintaining integrity , which means preventing unauthorized modification of data, and availability , which means ensuring that systems and services remain usable and continuous for authorized users. In practical terms, this means using controls such as access management, firewalls, intrusion prevention, antivirus protection, encryption, backup, authentication, and monitoring to reduce both accidental and intentional threats.

The phrase about ensuring proper system running and uninterrupted information services also matches the availability goal of security. Therefore, the statement correctly describes the overall aim of information security and is TRUE .

This statement is TRUE . HTTPS is essentially HTTP running over TLS . While HTTP by itself transmits data in plaintext, HTTPS adds the TLS security layer to protect communication between the client and the server. By introducing TLS, HTTPS provides three important security functions during transmission.

First, it provides identity authentication . The server proves its identity to the client through a digital certificate , helping the client confirm that it is communicating with the legitimate server rather than an attacker. Second, HTTPS provides encryption . After the TLS negotiation process is completed, the transmitted HTTP data is encrypted, preventing attackers from easily reading sensitive information such as usernames, passwords, and session data. Third, HTTPS ensures data integrity . TLS includes mechanisms to detect whether transmitted data has been modified during communication.

Because of these features, HTTPS is widely used for secure web access, online transactions, authentication pages, and confidential information exchange. Therefore, the statement that HTTPS introduces the TLS layer based on HTTP to provide authentication, encryption, and integrity protection is correct.

Explanation From HCIA-Security documents:

On a Huawei firewall, a security zone is a logical grouping of interfaces with similar security requirements. An interface can belong to only one security zone at a time , so option A is incorrect. Default zones such as trust, untrust, and local are system-defined and cannot be deleted, which makes B incorrect.

Different security zones are typically assigned different default security levels to define trust relationships and policy direction, so C is also incorrect.

However, multiple physical or logical interfaces can be assigned to the same security zone if they share the same security policy and trust level. For example, several internal LAN interfaces can all be placed in the trust zone, while multiple WAN interfaces can be placed in the untrust zone. Traffic policies are usually applied between zones rather than per interface. Therefore, the correct statement is D