Huawei H12-711_V4.0 HCIA-Security V4.0 Exam Exam Practice Test

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.

Use SSL VPN to access the firewall to trigger authentication → Access user

Use HTTP to access the intranet web server to trigger authentication → Internet access user

Log in to the firewall through Telnet, SSH, or web to trigger authentication → Administrator

These authentication modes correspond to different user roles on a Huawei firewall. An Access user is typically a user who connects to enterprise resources through technologies such as SSL VPN . In this case, the user accesses the firewall as a secure access gateway, and authentication is triggered when the SSL VPN session is initiated.

An Internet access user usually refers to a common end user whose identity must be verified before being allowed to access network resources through the firewall. A common way to trigger this authentication is by using HTTP to access an intranet or web resource , which leads to Portal-based identity verification and access control.

An Administrator is different from ordinary service users because this role is responsible for managing and configuring the firewall itself. Therefore, authentication for an administrator is triggered when the person logs in directly to the firewall through Telnet, SSH, or the web management interface .

So the correct matches are: SSL VPN → Access user , HTTP intranet access → Internet access user , and Telnet/SSH/web login → Administrator .

Explanation From HCIA-Security documents:

TCP is a connection-oriented transport protocol, so it must establish a reliable session before user data can be exchanged. To create the session, TCP uses the three-way handshake: the initiator sends a SYN to request a connection and advertise its initial sequence number, the responder replies with SYN/ACK to acknowledge the request and provide its own initial sequence number, and finally the initiator sends an ACK to confirm receipt. This process confirms bidirectional reachability, synchronizes sequence numbers, and prepares both ends for reliable delivery, retransmission control, and flow control.

To end a TCP connection gracefully, TCP performs an orderly close in both directions (full-duplex). One endpoint sends FIN to indicate it has no more data to send, the peer responds with ACK . When the peer is also ready to stop sending, it transmits its own FIN , and the original endpoint responds with a final ACK . Because each direction is closed independently, termination is typically described as a four-way handshake .

Security zones are used to classify interfaces by trust level and simplify policy control. Traffic control decisions are usually applied between zones (interzone), and many firewall products (including Huawei) treat intrazone traffic differently from interzone traffic. Typically, communications between hosts within the same zone are not the primary target of security policy control, and mutual access within a zone does not have to be explicitly permitted by security policies in the same way as traffic between different zones. Therefore, statement A is correct in the context of zone-based policy control.

Firewall policies are created with a source zone and destination zone (and other match conditions), and they can be written to allow traffic in a specific direction (for example, Trust → Untrust) while denying the reverse direction (Untrust → Trust). That makes statement B correct: policies can be directional.

Statement C is incorrect because Huawei firewalls also include a default Local zone in addition to Trust, Untrust, and DMZ. Statement D is incorrect because an interface (or sub-interface) is assigned to one security zone; assigning the same interface to multiple zones would break the trust-boundary model and policy evaluation.

Explanation From HCIA-Security documents:

IKE-based SA establishment is designed to automate IPsec parameter negotiation and key management, which makes it especially suitable for environments where configuring many tunnels manually would be inefficient. That is why B is correct: IKE scales better for medium and large networks because it negotiates policies, authenticates peers, and builds SAs dynamically instead of relying on fixed, manually configured keys.

A is incorrect because Security Associations have lifetimes. Both IKE SAs and IPsec SAs are created with time-based and/or traffic-based lifetimes and must be refreshed or renegotiated when they expire to maintain security. Permanent SAs would increase risk because long-lived keys are more exposed to compromise.

C is correct : SPI is a 32-bit identifier used by the receiver to find the correct SA for inbound traffic, and it is typically chosen by the receiving side in a way that avoids collisions—commonly treated as randomly generated in foundational descriptions.

D is correct because IKE uses Diffie-Hellman to derive shared keying material securely over an untrusted network, and then refreshes keys by rekeying based on SA lifetime, achieving dynamic updates.

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 .

Huawei firewalls use security zones to group interfaces that share the same trust level and security policy requirements. In the default configuration, Huawei firewalls provide four built-in zones that cover the most common deployment scenarios.

Trust represents the internal network where users and servers are typically considered more reliable. Untrust represents external networks such as the Internet, where traffic is considered untrusted and usually requires stricter access control and security inspection. DMZ is designed for semi-public servers (for example, web or mail servers) that must be reachable from Untrust but should be isolated from the Trust network to reduce lateral movement risk if a DMZ host is compromised. Local is a special zone that represents the firewall device itself (management plane and control plane). Traffic destined to or originating from the firewall (such as management access, routing protocol packets, or local services) is associated with the Local zone and is controlled using dedicated policies.

Because these four zones are pre-defined and available by default, all listed options are correct.

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:

IPsec secures user traffic mainly through the ESP or AH mechanisms, delivering a combination of confidentiality and authentication-related protections. Data encryption (A) provides confidentiality so that intercepted packets cannot be read by unauthorized parties. This is typically delivered by ESP using symmetric encryption algorithms negotiated during IKE.

For authentication, IPsec provides data origin authentication (B) , meaning the receiver can confirm that packets were generated by the expected peer (the holder of the correct IPsec SA and keys). Along with that, IPsec performs a data integrity check (D) so that any modification to the protected portion of a packet in transit is detected; integrity is commonly provided using an HMAC or authenticated encryption method.

Finally, IPsec also includes anti-replay (C) protection. By using sequence numbers and a replay window, the receiver can detect and discard duplicated old packets, which prevents attackers from capturing encrypted/authenticated traffic and retransmitting it to disrupt sessions or attempt misuse.

Because IPsec secure transmission depends on encryption plus authentication, integrity, and replay protection working together, all four options are correct.

Intrusion Prevention (IPS) detects and blocks attacks primarily by analyzing traffic patterns and payload characteristics against known signatures, protocol anomalies, and behavioral rules. Many common application-layer exploits have recognizable request structures that IPS engines can match.

An injection attack (such as SQL injection or command injection) typically contains suspicious characters, keywords, and abnormal parameter patterns within application requests. IPS signatures can detect these malicious payload characteristics and either block the session or generate alarms. Directory traversal attacks also have distinct patterns, such as attempts to access unauthorized paths using sequences like ../ (or encoded variants). These are classic web-attack signatures commonly covered by IPS rule sets. Buffer overflow attacks often exploit protocol or application parsing weaknesses by sending overly long fields, malformed headers, or abnormal protocol sequences; IPS can detect these through signature matching and protocol anomaly detection.

A Trojan horse , however, is malware residing on an endpoint (often delivered via files, email attachments, downloads, or user execution). While some network security features (like antivirus/URL filtering/sandboxing) may detect Trojan delivery or command-and-control traffic, “Trojan horse” itself is not typically classified as an IPS-detected attack type in this context. Therefore, A, B, and D are correct.

On Huawei firewalls, traffic direction is determined according to the priority of security zones . When traffic moves from a low-priority zone to a high-priority zone , that direction is called Inbound . For example, traffic going from the Untrust zone to the Trust zone is considered inbound because Untrust has a lower security priority than Trust.

By contrast, traffic moving from a high-priority zone to a low-priority zone is called Outbound . A common example is internal users in the Trust zone accessing resources on the Internet in the Untrust zone. This zone-priority concept is important because firewall security policies, packet filtering behavior, and session control are all evaluated according to the source zone and destination zone.

Understanding inbound and outbound directions is essential when configuring interzone security policies. Administrators must know whether traffic is flowing from low to high priority or high to low priority in order to apply the correct permit, deny, NAT, and inspection rules. Since the question specifically asks for the direction from a low-priority zone to a high-priority zone, the correct answer is Inbound .

A Denial of Service attack is intended to make a host, server, or network service unavailable to legitimate users. It usually works by exhausting system resources such as bandwidth, CPU, memory, connection tables, or buffers, so valid users cannot access the service normally. Therefore, statement B is correct because the essential purpose of a DoS attack is to interrupt services or block resource access on the target.

Statement C is also correct. Many DoS attacks attempt to consume queue space, session resources, or buffers on the target so that new connection requests cannot be processed. This is a common way of making a service unavailable. Statement A can also be correct in the context of some DoS methods, because attackers may use IP spoofing to hide their identity, bypass simple filtering, or increase the difficulty of tracing the attack source.

Statement D is incorrect because DoS attacks are designed to affect availability , not to create unrecoverable physical damage to hardware. They may crash systems, overload services, or interrupt access, but they do not normally destroy the target device physically.

Explanation From HCIA-Security documents:

On Huawei firewalls, security protection whitelist rules are used to exclude specific traffic objects (such as certain URLs, domains, or application-identification strings, depending on the feature) from being blocked or inspected by security protection mechanisms. To avoid overly broad exemptions, the whitelist provides clear, controllable string matching modes. Commonly supported modes include prefix matching (the protected object begins with the specified string), suffix matching (the protected object ends with the specified string), and keyword matching (the protected object contains the specified keyword). These modes are deterministic and easy to validate, which helps administrators precisely exempt expected legitimate traffic while reducing the risk of accidentally whitelisting unrelated malicious traffic.

“Fuzzy matching” is not used as a whitelist matching mode because it is inherently ambiguous and may cause unintended matches. In security whitelisting, ambiguous matching would weaken protection by making the exemption scope unpredictable. Therefore, among the options provided, fuzzy matching is the one that is not a supported whitelist matching mode.

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:

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.

In Huawei firewall hot standby, the heartbeat link is mainly used to maintain the backup relationship and monitor peer status. Through this link, the two firewalls periodically exchange heartbeat packets to confirm whether the peer device is alive and operating normally. This makes statement B correct. The heartbeat link also carries VGMP-related packets , which help the devices determine their active or standby roles and decide whether a switchover is necessary when faults or status changes occur. Therefore, statement C is also correct.

In addition, the firewalls can exchange configuration consistency check information to verify whether key configurations on both devices match, so statement D is correct as well.

The incorrect statement is A . Configuration and status synchronization between hot standby firewalls is not described simply as heartbeat packets being used to synchronize configuration commands and status information. Heartbeat packets are mainly for liveness detection and status maintenance , while configuration or session synchronization is handled by dedicated hot standby synchronization mechanisms rather than ordinary heartbeat packets themselves. Therefore, A is the incorrect statement.

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.

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.