H12-711_V4.0 Exam Dumps - HCIA-Security V4.0 Exam

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:

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.

On a firewall that includes antivirus inspection, the device can take different response actions after it detects malware in traffic (for example, in file transfers, email attachments, or web downloads). Block is a standard antivirus action: the firewall stops the session or drops the infected content to prevent the malicious file from reaching the destination host. Alert (alarm/log) is also a common response action: the firewall generates an event, log, or alarm so administrators can investigate the source, destination, file type, signature name, and policy that triggered the detection.

Some firewall antivirus engines also support content-handling actions such as deleting an attachment (or stripping the infected file/attachment) while allowing the rest of the session to proceed, depending on the protocol and security profile. This is typically used in scenarios like email or file-based protocols where removing the infected payload is feasible.

Declare is not a normal antivirus response action on firewalls; it does not describe a meaningful enforcement or notification behavior. Therefore, the valid antivirus response actions here are Block, Alert, and Delete attachment.

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.