Free and Premium Huawei H12-711_V4.0 Dumps Questions Answers

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.

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

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.

This statement is TRUE . On Huawei firewalls, security policies are mainly used to control traffic between different security zones . The firewall determines policy matching based on the source zone and destination zone , and these interzone policies decide whether traffic is permitted or denied.

For traffic between users in the same zone , permit security policies generally do not need to be configured. This is because hosts and interfaces belonging to the same security zone are considered to have the same trust level, and their communication is not normally controlled by interzone security policy rules in the same way as traffic moving from one zone to another. In other words, the main purpose of zoning is to define boundaries between different trust levels, not to force permit rules for communications inside a single zone.

This behavior simplifies firewall policy deployment. Administrators mainly need to focus on policy design for traffic such as Trust to Untrust , Untrust to DMZ , or DMZ to Trust , where different trust levels exist. Therefore, for traffic between users in the same zone , a permit action security policy is generally not required .

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 .

This statement is TRUE . A DMZ is a special security zone used to place servers that must provide services to external users while still being isolated from the internal trusted network. Typical examples include WWW servers, FTP servers, mail servers, and DNS servers . These systems need to be accessible from outside networks such as the Internet, but placing them directly inside the internal network would increase security risk.

The purpose of the DMZ is to create a buffer area between the Untrust zone and the Trust zone. External users can be allowed to access the public-facing servers in the DMZ according to security policies, while access from the DMZ to the internal network can be more strictly restricted. This design helps reduce the chance that an attacker who compromises a public server can directly reach sensitive internal systems.

On Huawei firewalls, the DMZ is one of the default security zones and is specifically intended for such semi-public service devices. Therefore, devices that provide external network services, such as WWW and FTP servers, can correctly be deployed in the DMZ .

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:

This scenario states two key conditions: (1) there are only a small number of users accessing the Internet, and (2) the number of available public IP addresses is equal to the number of concurrent Internet users. That means the organization has enough public addresses to assign a dedicated public IP to each internal user at the same time. In such a case, the most suitable NAT type is NAT No-PAT, which is also commonly understood as traditional one-to-one address translation (no port translation). The internal source IP is translated to a unique public source IP, and the transport-layer port number is not multiplexed to share a single public IP among many users.

By contrast, NAPT and Easy IP are used when public addresses are scarce, because they translate multiple internal users to one or a few public IP addresses by also translating port numbers (PAT). 3-tuple NAT is a more specific translation method involving matching/translation with additional parameters, but it is not the standard choice described by the given “equal number of public IPs and concurrent users” condition. Therefore, NAT No-PAT is correct.

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 .

A packet filtering firewall mainly works by examining the header information of packets and making forwarding or blocking decisions based on predefined rules. Its inspection is primarily focused on the network layer , where it checks information such as the source IP address , destination IP address , protocol type, and related packet header fields. Because of this, the correct answer is Network layer .

Packet filtering firewalls can also use some transport-layer information such as TCP or UDP port numbers in practical policy matching, but their fundamental classification in traditional firewall technology is based on network-layer packet filtering rather than deep inspection of application content. They do not analyze user data in the same detailed way as application-layer gateways or next-generation firewalls.

The physical layer only deals with bit transmission and hardware signaling, so it is not the layer used for packet filtering decisions. The data link layer focuses on MAC addresses and frame transmission within a local segment, while the application layer deals with application protocols such as HTTP, FTP, and DNS. Therefore, for a packet filtering firewall, the correct layer checked is the Network layer .

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.

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:

Huawei firewalls use security zones to classify interfaces and apply interzone access control and security policies. Some zones are predefined default zones that are built into the system to represent common network roles, such as Trust and Untrust. These default zones are foundational for typical deployments and are generally not allowed to be deleted, because many policy and security mechanisms rely on them as standard references.

In contrast, DMZ is commonly used as a semi-trusted zone for servers that must be reachable from the Internet while still being isolated from the internal network. On Huawei firewalls, DMZ is treated as a configurable zone: administrators can create it when needed, remove it when it is not required, and adjust its priority value so that zone-based matching and policy selection behave as intended in multi-zone deployments.

“ISP” is not a standard default security zone name in the typical Huawei firewall zone model presented at HCIA level. Therefore, among the options, DMZ is the zone that can be deleted and whose priority can be reconfigured.

Explanation From HCIA-Security documents:

In IKEv1 Phase 1 aggressive mode, the negotiation completes in three messages, unlike main mode which uses six.

Message 1 (Initiator → Responder): Contains the IKE proposal, Diffie-Hellman public value, nonce, and the initiator’s identity information.

Message 2 (Responder → Initiator): Returns the selected proposal, responder’s Diffie-Hellman public value, nonce, identity information, and authentication data. At this stage, the initiator can authenticate the responder.

Message 3 (Initiator → Responder): Carries the initiator’s authentication data, allowing the responder to verify and authenticate the initiator.

Therefore, the primary function of message 3 is to provide authentication information so that the responder can confirm the identity of the initiator.

Options A and B correspond to earlier negotiation steps, and C describes part of message 2. Hence, the correct answer is D.

Explanation From HCIA-Security documents:

HTTPS protects web-based management by combining encryption with server identity authentication . For the browser to trust the device’s HTTPS service, the device must present a server certificate that can be validated by the browser. That is why administrators often configure the device to use a local certificate (the device’s certificate) that is issued by a trusted CA or whose CA chain has been imported into the browser/OS trust store. When the certificate is trusted, the browser can verify the certificate chain, validity period, and hostname binding, which helps prevent attackers from impersonating the device during login.

If a device uses a self-signed or untrusted certificate, the browser shows warnings and users may click through them, increasing the risk of man-in-the-middle attacks and credential theft. Using a CA-trusted certificate strengthens administrator logins by ensuring the management page you connect to is genuinely the intended device and that the session is encrypted end-to-end.

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.

In Huawei firewall hot standby and reliability deployment, the VGMP group can operate in several different states that reflect the working role of a device in the backup system. These states are used to identify whether a device is currently forwarding service traffic, waiting as a backup device, balancing traffic, or still in the startup phase.

Initialize refers to the initialization state, in which the VGMP group has not yet fully completed role negotiation or status establishment. Active indicates that the firewall is currently the primary device responsible for forwarding traffic and providing services. Standby means the firewall serves as the backup device, ready to take over if the active device fails. Load-balance is used in scenarios where traffic is distributed between devices according to the load-balancing mechanism rather than relying on only one active forwarding device.

These VGMP status values help administrators understand device roles and cluster behavior during deployment, failover, and service switching. Since all four listed items are recognized VGMP group states in Huawei firewall high availability scenarios, A, B, C, and D are all correct .

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 .

A. Scanning attacks → Attackers use ICMP packets to probe the target IP address to identify active hosts that connect to the target network.

B. Malformed packet attacks → Attackers send considerable malformed packets in an attempt to crash targeted hosts or servers.

C. Special packet control attacks → Such attacks are reconnaissance activities for attacks but not real attacks. That is, attackers send special packets to probe network structures.

In HCIA-Security, single-packet attacks are commonly categorized by the purpose and structure of the packets being sent. Scanning attacks are mainly used to discover targets and collect information before a real attack begins. A common example is using ICMP probe packets to identify whether hosts are alive and reachable on a network. This makes the ICMP host-discovery description the correct match for scanning attacks.

Malformed packet attacks involve sending packets with abnormal, invalid, or deliberately corrupted structures. Their purpose is to exploit weaknesses in protocol handling or operating system processing so that the target host, device, or server becomes unstable, crashes, or stops responding. Therefore, the description about sending many malformed packets to crash targets clearly matches this category.

Special packet control attacks are also more related to probing than direct destruction. In this case, attackers send specially crafted control or probe packets to learn network structure, device behavior, or service characteristics. These activities are considered reconnaissance rather than full attacks. That is why the description about probing network structures with special packets belongs to special packet control attacks.

Explanation From HCIA-Security documents:

IPS works by identifying malicious traffic patterns and behaviors in network data. An IPS signature is a set of detection rules that describe known attack characteristics, such as specific byte sequences in payloads, abnormal protocol fields, exploit patterns, or behavior indicators that match a recognized threat. When traffic passes through the firewall with IPS enabled, the device performs protocol decoding and (when needed) stream or application data reassembly so it can inspect complete content instead of isolated packets. After that, it compares the reconstructed traffic against the IPS signature database. If a match is found, the firewall determines the traffic is malicious and then takes the configured action, such as blocking packets, resetting the connection, discarding the session, and generating logs/alarms for visibility and auditing. This signature-based comparison is a core detection method of IPS and is why keeping the signature library updated is important: new attack techniques require new or improved signatures. Therefore, the statement is correct: the firewall detects and defends by comparing data flows with IPS signatures.