H12-711_V4.0 HCIA-Security V4.0 Exam Questions and Answers

Explanation From HCIA-Security documents:

In a typical PKI workflow, the CA is mainly responsible for certificate issuance and lifecycle management, but it usually does not handle direct identity verification for most end users. Instead, the user submits a certificate application request (often a CSR) through a defined enrollment channel, and the RA performs the key step of validating the requester’s identity and authorization according to the organization’s certificate policy. After the RA approves the request, it is forwarded to the CA for signing and issuance. This separation of duties improves security and scalability: the CA stays protected and focused on signing operations, while the RA enforces registration, approval, and identity-proofing processes close to the user or business unit.

Therefore, saying “in most cases the user applies to the CA and the CA approves the application” is inaccurate in standard enterprise PKI designs. The CA issues the certificate, but approval and verification are commonly handled by the RA, with the CA acting on the RA’s validated decision.

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.

Explanation From HCIA-Security documents:

Portal authentication is an identity-based access control method where a user is redirected to an authentication portal and, after successful login, is permitted to access network resources based on the configured policy. The key point is that the authentication page is not limited to the firewall’s built-in page only. In Huawei Portal solutions, the authentication page can be provided by the device itself or by an external Portal server, and the user completes authentication on the presented Portal page after redirection. Therefore, saying users can be authenticated only on the firewall authentication page is incorrect.

The other statements describe the two common triggering modes correctly. In session authentication, the user accesses an HTTP service first, is redirected or challenged, and service access is permitted only after identity authentication succeeds. In user-initiated authentication, the user proactively opens the authentication page and logs in first, then gains access to network resources. These are recognized built-in triggering modes for Portal authentication.

Explanation From HCIA-Security documents:

In the TCP/IP and OSI reference models, the transport layer is responsible for end-to-end communication between hosts. It provides services such as segmentation, multiplexing through port numbers, and (depending on the protocol) reliability, flow control, and congestion control. The two core transport layer protocols are TCP and UDP.

TCP is connection-oriented and reliable: it establishes a session using the three-way handshake, uses sequence numbers and acknowledgments for retransmission, and supports flow and congestion control to ensure ordered delivery. UDP is connectionless and best-effort: it does not build a session or guarantee delivery, which makes it lightweight and suitable for scenarios such as voice/video streaming and simple query/response services.

By contrast, FTP and DHCP are application layer protocols. FTP provides file transfer services and runs over TCP ports, while DHCP provides dynamic IP address assignment and uses UDP at the transport layer but is itself an application-layer protocol. Therefore, the transport-layer protocols in the options are UDP and TCP.

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 .

In IPsec ESP transport mode , the authentication process protects most of the ESP packet except the outer IP header and the authentication data field itself. Specifically, the authentication calculation covers the ESP header, the encrypted payload (such as the TCP header and application data), and the ESP trailer . The IP header is not included , because it may change during packet transmission, and the ESP authentication data field is also excluded because it stores the result of the authentication calculation.

Looking at the packet structure in the figure, the order is: IP Header → ESP Header → TCP Header → Data → ESP Tail → ESP Auth Data . The correct authentication range therefore begins at the ESP header and ends at the ESP tail , but it does not include the IP header or the ESP authentication data.

In the diagram, option 3 represents the range starting from the ESP header and ending at the ESP tail , which matches the actual authentication coverage of ESP in transport mode. Therefore, the correct answer is 3 .

This statement is FALSE . In Huawei firewall hot standby networking, the heartbeat link is used for important communication between the two devices, such as peer status detection, role negotiation, and hot standby related information exchange. However, the heartbeat interfaces do not have to be directly connected with a cable in all cases.

The two heartbeat interfaces can be connected through an intermediate Layer 2 switch , as long as the link is reliable and can properly carry heartbeat traffic between the two firewalls. What matters most is that the heartbeat communication remains stable, low-delay, and uninterrupted, because failure of the heartbeat link may affect peer monitoring and could trigger unnecessary active/standby switching.

In many practical deployments, direct connection is preferred because it is simpler and can reduce the risk of intermediate device failure. Even so, “preferred” is not the same as “must.” The requirement is for a dependable heartbeat path, not strictly a point-to-point cable connection between the two firewalls.

Therefore, the statement saying the heartbeat interfaces must be directly connected is incorrect, so the correct answer is FALSE .

The correct operation is D because email attachments are a common carrier for malware, phishing payloads, ransomware, Trojans, and malicious scripts. In enterprise security practice, a user should not trust an attachment only because the message looks work-related or appears to come from a company mailbox . Attackers can spoof sender information, disguise malicious content, or compromise legitimate accounts. Therefore, simply checking the content or sender is not enough to ensure safety.

A safer process is to verify the sender and the email details carefully , such as the address, subject, wording, unexpected urgency, and whether the attachment type matches the business context. After that, the attachment should be scanned with antivirus or endpoint security software before opening or saving it. This helps detect known malicious files and reduces the chance of infecting the host or internal network.

Option A is unsafe because work relevance alone does not prove the file is harmless. B is clearly wrong because attachments can directly affect information security. C is also unsafe because internal-looking mail can still be malicious. Therefore, D is the correct answer.

This statement is TRUE . In VRRP, a device in a virtual router group can exist in three defined states : Initialize , Master , and Backup . These states determine how the device participates in gateway redundancy and packet forwarding.

The Initialize state is the beginning state of a VRRP router. In this state, the device is not yet acting as the active virtual gateway and is preparing to participate in the VRRP election process. After VRRP negotiation or election, one router becomes the Master . The Master router owns the virtual IP address for the group, forwards user traffic sent to that virtual gateway, and periodically sends VRRP advertisement packets to inform the other routers that it is operating normally.

The other routers remain in the Backup state. Backup routers do not normally forward traffic for the virtual gateway, but they continuously monitor the Master’s advertisements. If the Master fails or stops sending advertisements within the expected time, one of the Backup routers is elected to take over and become the new Master. This failover mechanism ensures default gateway redundancy , reduces service interruption, and improves network reliability. Therefore, the statement is correct.

Explanation From HCIA-Security documents:

A packet filtering firewall mainly makes decisions based on L3/L4 header information such as source/destination IP address, protocol, and port, usually through static ACL rules . Because it does not deeply understand application behavior and typically does not track full session state like a stateful inspection firewall, it has several limitations.

A is a disadvantage because basic packet filtering is often implemented as rule-by-rule matching; under heavy traffic or intentionally flooded traffic, performance can degrade and the device may be pressured by DoS-style loads, especially if rules are long or the platform is resource-limited.

B is also a disadvantage: packet filtering that trusts only IP information can be bypassed by IP spoofing in certain scenarios, allowing traffic to appear as if it comes from an allowed address.

C is correct because packet filtering relies on static policies , which struggle to handle dynamic connections, complex services, and fine-grained user-based control.

D is not a disadvantage of packet filtering; dynamic connection status lists are a feature of stateful firewalls, not simple packet filters.

Certificate application

Certificate issuing

Certificate storage

Certificate verification

Certificate usage

Certificate update

Certificate revocation

The PKI lifecycle describes the complete process a digital certificate goes through from creation to termination. The first stage is certificate application , where a user or device generates a key pair and submits a certificate request to the certification authority or registration authority.

After the request is approved, the CA performs certificate issuing , which involves creating and signing the certificate using the CA’s private key. Once issued, the certificate must be securely saved on the device, which is the certificate storage phase. Proper storage ensures that the certificate and the associated private key can be safely used when authentication or encryption is required.

Before using a certificate in communication, systems perform certificate verification . This step checks the certificate chain, validity period, and CA signature to confirm that the certificate is trustworthy. After successful verification, the certificate enters the certificate usage phase, where it is used for encryption, authentication, digital signatures, or secure communications such as HTTPS or IPsec.

During its lifetime, a certificate may require certificate update (renewal) when it approaches expiration. Finally, if the certificate becomes invalid or compromised, certificate revocation is performed to terminate its trust before its expiration date.

Huawei firewalls are stateful devices. This means they do not evaluate every packet only by static rules; instead, they track communications as sessions and then handle subsequent packets based on the session state. When the first packet of a flow arrives, the firewall matches it against the security policy, performs checks (and NAT if configured), and if allowed, it creates a session entry in the session table. That entry records key information such as source/destination IP addresses, protocol, ports or identifiers, zones, NAT translation information, timeout values, and the current state.

After the session is created, later packets of the same TCP/UDP flow, or related ICMP traffic, are forwarded efficiently by querying the session table first. If a matching session exists and the state is valid, the firewall applies the corresponding actions (permit/deny, NAT mapping, logging, QoS, inspection) without repeating the full policy lookup each time. If no session matches, the firewall treats the packet as a new flow and re-evaluates it against policies. Therefore, the statement is true.

In LDAP, a Distinguished Name or DN is used to uniquely identify an entry in the directory tree. The DN is composed of a sequence of attribute-value pairs that describe the exact location of an object within the LDAP directory hierarchy. Common attributes used in a DN include CN , DC , and OU .

CN stands for Common Name and is often used to identify a specific user, host, or object. OU stands for Organizational Unit and is used to represent a department or subdivision within the directory structure. DC stands for Domain Component and is commonly used to describe parts of a domain name, such as dc=example,dc=com .

On the other hand, DIT stands for Directory Information Tree . It refers to the overall hierarchical structure of the LDAP directory, not an attribute contained inside a DN. In other words, DIT describes the tree itself, while CN, OU, and DC are actual naming attributes used to build the DN of an LDAP object.

Therefore, the correct attributes contained in the DN are CN, DC, and OU .

Explanation From HCIA-Security documents:

All four statements describe standard PKI roles and structure. A PKI entity is any certificate holder or relying participant that uses PKI services, which includes people, organizations, network devices, servers, and even application processes, so A is correct. PKI trust is commonly built using a CA hierarchy, where the root CA anchors trust and subordinate CAs issue certificates under the root’s authority, so B is correct. The CA is the core trusted component that signs (issues) certificates and manages their lifecycle activities such as renewal, suspension or revocation publication, and certificate status services, so C is correct. In many enterprise implementations, the PKI system is presented as three major roles: entities that request/use certificates, the RA that performs identity verification and approval of requests, and the CA that issues certificates based on validated requests, so D is also correct.

Explanation From HCIA-Security documents:

AAA provides a unified framework for Authentication, Authorization, and Accounting, and on Huawei devices the AAA authentication method can be selected according to the management and deployment requirements. Local authentication uses user accounts stored on the device itself, which is suitable for small environments, emergency access, or when external servers are unavailable. RADIUS authentication relies on a centralized RADIUS server, commonly used for large-scale user access control and unified credential management. HWTACACS authentication is another centralized mode that supports fine-grained control and is often preferred in scenarios requiring stronger separation of authentication and authorization, as well as detailed command-level management in some deployments. In addition, AAA can be configured for no authentication (also called none), meaning the device does not verify user identity for a specific access scenario. This mode is typically used only in controlled environments or for specific services where authentication is handled elsewhere, because it reduces security. Therefore, all listed modes are supported by AAA.

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

Explanation From HCIA-Security documents:

A server mapping entry is a lightweight record used to describe a static or semi-static mapping relationship that helps the device forward traffic from an external user to an internal server. Compared with a session entry, it contains fewer fields because it does not need to maintain full connection state information such as TCP state, sequence-related tracking, timers for each direction, and the complete flow 5-tuple details used for every active connection.

In NAT scenarios, server mapping is commonly created for NAT Server (port mapping/port forwarding). This lets Internet users initiate connections to a public IP address and port, and the device translates and forwards the traffic to the specified intranet server and service port.

In ASPF scenarios, server mapping can be used to support certain protocols and service openings by creating an association that guides traffic handling, while the detailed per-connection information is still maintained later in the session table after the connection is established. Because server mapping enables inbound reachability to internal servers with fewer parameters than a full session, the statement is TRUE.