Pass the Huawei HCIA-Security H12-711_V4.0 Questions and answers with Dumpstech

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

The packet capture in the figure shows three TCP packets exchanged between 192.168.1.2 and 192.168.1.1 . The first packet from 192.168.1.2 → 192.168.1.1 contains the [SYN] flag. In TCP communication, the SYN flag indicates that a host is requesting to establish a TCP connection . This is the first step of the TCP three-way handshake process.

The second packet from 192.168.1.1 → 192.168.1.2 contains [SYN, ACK] , meaning the destination host acknowledges the request and agrees to establish the connection while sending its own synchronization request. The third packet from 192.168.1.2 → 192.168.1.1 contains [ACK] , confirming the response and completing the connection establishment process.

This sequence ( SYN → SYN/ACK → ACK ) clearly indicates the TCP connection establishment procedure , not termination. TCP connection termination normally involves FIN and ACK flags rather than SYN.

Although the capture shows ports such as nfs > http , the packets shown only represent the TCP handshake and do not confirm application-layer login activities such as Telnet or HTTP authentication. Therefore, the correct statement is that the terminal is sending a TCP connection establishment request to 192.168.1.1 .

Explanation From HCIA-Security documents:

On Huawei firewalls, a physical interface such as GE0/0/1 can be split into multiple sub-interfaces to support VLAN-based networking. Each sub-interface can be configured with an 802.1Q VLAN tag, allowing a single physical port to carry traffic for multiple VLANs (trunk-style access). This is commonly used when the firewall must provide Layer 3 gateway or security control for several VLANs over one uplink.

The statement becomes incorrect because sub-interfaces can be assigned to security zones. In Huawei’s zone-based policy model, security zones are logical groupings of interfaces used for policy enforcement, NAT direction, and security inspection decisions. A sub-interface behaves like an independent logical interface: it has its own IP configuration (if used at Layer 3), can participate in routing, and can be placed into a specific security zone just like a physical interface. This is necessary so that traffic between VLANs (mapped to different sub-interfaces) can be controlled using interzone security policies. Therefore, the claim that sub-interfaces cannot be added to security zones is false.

Protocol identification and analysis

Application data reassembly

Signature matching

Attack response

The correct IPS processing order starts with protocol identification and analysis . Before an IPS can judge whether traffic is malicious, it must first determine what protocol is being used and analyze the packet structure according to the expected protocol behavior. This helps the device understand whether the traffic is HTTP, FTP, SMTP, DNS, or another protocol and prepares it for deeper inspection.

After that, the IPS performs application data reassembly . Many attacks are not visible in a single packet, so the IPS must reconstruct fragmented or segmented traffic into complete application data. This allows the device to inspect the real payload content rather than isolated packet pieces.

Once the data is reassembled, the IPS performs signature matching . At this stage, the traffic content and behavior are compared with known attack signatures, protocol anomalies, and detection rules to determine whether the traffic matches a malicious pattern such as injection, buffer overflow, or directory traversal.

Finally, the IPS performs the attack response . Based on the detection result, it may permit, block, reset, alarm, or log the traffic. Therefore, the correct order is D → A → B → C .