{"id":21741,"date":"2026-09-25T07:08:29","date_gmt":"2026-09-25T07:08:29","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=21741"},"modified":"2026-09-25T07:08:29","modified_gmt":"2026-09-25T07:08:29","slug":"cisco-ccnp-security-300-720-practice-test-questions-and-exam-dumps-part-20-q381-400","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/cisco-ccnp-security-300-720-practice-test-questions-and-exam-dumps-part-20-q381-400\/","title":{"rendered":"Cisco CCNP Security 300-720 Practice Test Questions and Exam Dumps Part 20 Q381-400"},"content":{"rendered":"

View Full <\/b>Cisco CCNP Security 300-720 Exam Dumps<\/b><\/a> and Practice Test Dumps<\/b><\/h2>\n

 <\/p>\n

Question 381. Which Secure Email Gateway feature can be used to inspect attachments for malware before a message is delivered?<\/b><\/p>\n

    \n
  1. <\/b> Recipient Access Table<\/span><\/li>\n
  2. <\/b> Attachment scanning and malware protection<\/span><\/li>\n
  3. <\/b> Host Access Table<\/span><\/li>\n
  4. <\/b> SMTP AUTH<\/span><\/li>\n<\/ol>\n

    Correct Answer: 2. Attachment scanning and malware protection<\/b><\/p>\n

    Explanation :-<\/b><\/p>\n

    Attachment scanning and malware protection inspect files associated with email messages for potentially malicious content. Depending on the configured security services, the gateway can analyze attachments and apply actions such as blocking, quarantining, or otherwise handling messages according to policy. The Recipient Access Table controls recipient acceptance, the Host Access Table controls SMTP connection classification, and SMTP AUTH authenticates clients. Attachment security is an important part of email protection because malicious files can be delivered through otherwise legitimate-looking messages. Administrators should configure attachment handling according to organizational security requirements and the capabilities enabled on the gateway.<\/span><\/p>\n

    Question 382. Which Secure Email Gateway feature is most appropriate for identifying the reason a particular message was rejected during SMTP processing?<\/b><\/p>\n

      \n
    1. <\/b> Message Tracking<\/span><\/li>\n
    2. <\/b> Reporting<\/span><\/li>\n
    3. <\/b> SNMP<\/span><\/li>\n
    4. <\/b> LDAP<\/span><\/li>\n<\/ol>\n

      Correct Answer: 1. Message Tracking<\/b><\/p>\n

      Explanation :-<\/b><\/p>\n

      Message Tracking provides detailed information about individual message processing and can help administrators identify events associated with acceptance, filtering, rejection, quarantine, and delivery. When investigating a specific rejected message, tracking information can be correlated with SMTP response codes and the relevant mail-flow or security policy. Reporting is more appropriate for aggregate statistics, while SNMP supports monitoring integration and LDAP provides directory access. Message Tracking should therefore be one of the first tools used when an administrator needs to understand what happened to a particular message and why the gateway took a specific action.<\/span><\/p>\n

      Question 383. Which SMTP response code indicates that a requested action was completed successfully?<\/b><\/p>\n

        \n
      1. <\/b> 451<\/span><\/li>\n
      2. <\/b> 550<\/span><\/li>\n
      3. <\/b> 250<\/span><\/li>\n
      4. <\/b> 554<\/span><\/li>\n<\/ol>\n

        Correct Answer: 3. 250<\/b><\/p>\n

        Explanation :-<\/b><\/p>\n

        The SMTP response code 250 generally indicates successful completion of the requested SMTP action. It can be returned after successful processing of commands during an SMTP transaction, depending on the stage of communication. By comparison, 4xx responses such as 451 normally represent temporary conditions, while 5xx responses such as 550 and 554 generally indicate permanent rejection or transaction failure. Understanding SMTP response codes is useful when diagnosing message delivery because the code helps determine whether the sending system should consider the transaction successful, retry it later, or treat it as permanently failed.<\/span><\/p>\n

        Question 384. An administrator wants to ensure that messages sent through an outbound listener cannot be relayed by unauthenticated external clients. Which control should be reviewed?<\/b><\/p>\n

          \n
        1. <\/b> Outbound access and relay restrictions<\/span><\/li>\n
        2. <\/b> DKIM selector names<\/span><\/li>\n
        3. <\/b> DMARC aggregate reports<\/span><\/li>\n
        4. <\/b> MX record priority<\/span><\/li>\n<\/ol>\n

          Correct Answer: 1. Outbound access and relay restrictions<\/b><\/p>\n

          Explanation :-<\/b><\/p>\n

          Outbound access and relay restrictions determine which clients or connections are permitted to use the gateway for outbound message delivery. Administrators should ensure that external clients cannot use the listener as an unrestricted relay and should apply appropriate authentication or access controls where required. DKIM selectors identify signing keys, DMARC reports provide authentication information, and MX priorities identify mail exchangers. Relay restrictions are particularly important because an improperly configured outbound listener can be abused to send unauthorized messages through the organization’s infrastructure, potentially damaging reputation and consuming gateway resources.<\/span><\/p>\n

          Question 385. Which technology evaluates both SPF and DKIM authentication results together with domain alignment requirements?<\/b><\/p>\n

            \n
          1. <\/b> LDAP<\/span><\/li>\n
          2. <\/b> DMARC<\/span><\/li>\n
          3. <\/b> SNMP<\/span><\/li>\n
          4. <\/b> HAT<\/span><\/li>\n<\/ol>\n

            Correct Answer: 2. DMARC<\/b><\/p>\n

            Explanation :-<\/b><\/p>\n

            DMARC builds on SPF and DKIM by evaluating authentication results and whether the authenticated domains align with the visible From domain. A message can therefore have an SPF or DKIM result that does not satisfy DMARC if the required alignment is not met. DMARC also allows domain owners to publish policies such as <\/span>p=none<\/span>, <\/span>p=quarantine<\/span>, and <\/span>p=reject<\/span>. LDAP provides directory services, SNMP supports monitoring, and HAT controls SMTP connection classification. DMARC provides an important layer for reducing domain impersonation by combining authentication results with alignment and policy requirements.<\/span><\/p>\n

            Question 386. Which configuration can help ensure that a Secure Email Gateway requires encrypted SMTP communication from a particular class of senders?<\/b><\/p>\n

              \n
            1. <\/b> Configure a Mail Flow Policy with the appropriate TLS requirement<\/span><\/li>\n
            2. <\/b> Create a new MX record<\/span><\/li>\n
            3. <\/b> Disable the Recipient Access Table<\/span><\/li>\n
            4. <\/b> Remove all sender groups<\/span><\/li>\n<\/ol>\n

              Correct Answer: 1. Configure a Mail Flow Policy with the appropriate TLS requirement<\/b><\/p>\n

              Explanation :-<\/b><\/p>\n

              Mail Flow Policies can be configured to control TLS behavior for connections associated with specific sender groups. This allows administrators to apply different TLS requirements according to the trust level or business relationship of the connecting sender. A policy can require or otherwise control TLS behavior when supported by the configured deployment. MX records determine mail exchanger information, while the Recipient Access Table controls recipient acceptance. Removing sender groups would eliminate useful connection classification rather than enforce encryption. TLS policy should also be tested with the remote mail system to ensure certificate and protocol compatibility.<\/span><\/p>\n

              Question 387. Which SPF result indicates that the sending host is probably not authorized, but the domain owner has not requested a hard failure?<\/b><\/p>\n

                \n
              1. <\/b> Pass<\/span><\/li>\n
              2. <\/b> Fail<\/span><\/li>\n
              3. <\/b> SoftFail<\/span><\/li>\n
              4. <\/b> Neutral<\/span><\/li>\n<\/ol>\n

                Correct Answer: 3. SoftFail<\/b><\/p>\n

                Explanation :-<\/b><\/p>\n

                An SPF SoftFail result is typically produced by the <\/span>~all<\/span> mechanism. It indicates that the sending host probably is not authorized by the domain’s SPF policy, but the domain owner has not expressed the result as a definitive hard failure. SPF Fail, commonly associated with <\/span>-all<\/span>, represents an explicit authorization failure. Pass indicates that the sender is authorized, while Neutral indicates that the domain makes no assertion about authorization. Administrators should remember that SPF results are evaluated in context and that DMARC also requires alignment between the authenticated identity and the visible From domain when SPF is used for DMARC authentication.<\/span><\/p>\n

                Question 388. What is the primary purpose of the Recipient Access Table when processing inbound email?<\/b><\/p>\n

                  \n
                1. <\/b> Classify sending IP addresses<\/span><\/li>\n
                2. <\/b> Validate whether recipients are accepted by the gateway<\/span><\/li>\n
                3. <\/b> Generate DKIM signatures<\/span><\/li>\n
                4. <\/b> Monitor appliance health<\/span><\/li>\n<\/ol>\n

                  Correct Answer: 2. Validate whether recipients are accepted by the gateway<\/b><\/p>\n

                  Explanation :-<\/b><\/p>\n

                  The Recipient Access Table (RAT) controls recipient acceptance during inbound SMTP processing. It allows administrators to define the domains and recipient behavior for which the Secure Email Gateway is responsible. Proper RAT configuration helps prevent unauthorized relay and allows invalid recipients to be rejected during the SMTP transaction. The HAT performs sender classification, DKIM handles message signing and verification, and monitoring functions are handled through appropriate management and reporting mechanisms. Because recipient validation occurs during SMTP processing, a correctly configured RAT can prevent unwanted messages from progressing further into the mail-processing pipeline.<\/span><\/p>\n

                  Question 389. Which feature provides aggregate information rather than the detailed lifecycle of a single message?<\/b><\/p>\n

                    \n
                  1. <\/b> Reporting<\/span><\/li>\n
                  2. <\/b> Message Tracking<\/span><\/li>\n
                  3. <\/b> HAT<\/span><\/li>\n
                  4. <\/b> RAT<\/span><\/li>\n<\/ol>\n

                    Correct Answer: 1. Reporting<\/b><\/p>\n

                    Explanation :-<\/b><\/p>\n

                    Reporting provides aggregate information about email activity, security events, and operational trends. It can help administrators identify changes in message volume, spam activity, rejected messages, delivery behavior, or other supported metrics over a selected period. Message Tracking is designed to investigate individual messages and their processing history. HAT and RAT control connection and recipient behavior respectively. When an administrator wants to determine whether a security event is affecting a large number of messages rather than a single message, reporting provides the broader operational view needed for analysis.<\/span><\/p>\n

                    Question 390. Which action is appropriate when a suspicious message should be retained for later administrator review rather than delivered immediately?<\/b><\/p>\n

                      \n
                    1. <\/b> Release<\/span><\/li>\n
                    2. <\/b> Quarantine<\/span><\/li>\n
                    3. <\/b> Relay<\/span><\/li>\n
                    4. <\/b> Accept without inspection<\/span><\/li>\n<\/ol>\n

                      Correct Answer: 2. Quarantine<\/b><\/p>\n

                      Explanation :-<\/b><\/p>\n

                      Quarantine allows a message to be retained while preventing immediate delivery to the recipient. This gives administrators an opportunity to inspect the message and determine whether it should eventually be released, deleted, or otherwise handled according to policy. Releasing the message immediately would bypass the review process, while relaying or accepting it without inspection could expose the recipient to the suspected threat. Quarantine is therefore useful for messages that require additional investigation because of suspected spam, malware, policy violations, DLP conditions, or other security concerns.<\/span><\/p>\n

                      Question 391. Which DNS record contains the public key used by a receiving system to validate a DKIM signature?<\/b><\/p>\n

                        \n
                      1. <\/b> MX record<\/span><\/li>\n
                      2. <\/b> PTR record<\/span><\/li>\n
                      3. <\/b> DKIM TXT record<\/span><\/li>\n
                      4. <\/b> CNAME record<\/span><\/li>\n<\/ol>\n

                        Correct Answer: 3. DKIM TXT record<\/b><\/p>\n

                        Explanation :-<\/b><\/p>\n

                        The public key used to validate a DKIM signature is published in a DNS TXT record under the selector-specific <\/span>_domainkey<\/span> namespace. When a receiving system encounters a DKIM-Signature header, it uses the selector and signing domain to construct the DNS query and retrieve the corresponding public key. MX records identify mail exchangers, PTR records provide reverse DNS information, and CNAME records provide DNS aliases. Administrators managing DKIM should ensure that the selector in the message signature corresponds to the correct DNS TXT record and that the public key matches the private key used for signing.<\/span><\/p>\n

                        Question 392. An administrator observes a growing outbound queue with repeated temporary delivery failures. Which information should be examined first?<\/b><\/p>\n

                          \n
                        1. <\/b> Queue status and destination SMTP responses<\/span><\/li>\n
                        2. <\/b> DKIM private-key permissions only<\/span><\/li>\n
                        3. <\/b> Recipient Access Table for unrelated inbound domains<\/span><\/li>\n
                        4. <\/b> SNMP community names only<\/span><\/li>\n<\/ol>\n

                          Correct Answer: 1. Queue status and destination SMTP responses<\/b><\/p>\n

                          Explanation :-<\/b><\/p>\n

                          A growing outbound queue combined with temporary delivery failures indicates that messages are being retained while delivery attempts are unsuccessful. Queue status can show the affected destinations and message volume, while destination SMTP responses can reveal whether the remote server is returning temporary errors such as 421, 450, or 451. Administrators can then use Message Tracking and DNS diagnostics to investigate further. Reviewing unrelated inbound recipient settings or SNMP community names would not directly explain the outbound delivery condition. Starting with queue and SMTP-response information provides targeted evidence without unnecessarily changing production configuration.<\/span><\/p>\n

                          Question 393. Which SMTP response class normally represents a temporary condition that may allow the sender to retry delivery?<\/b><\/p>\n

                            \n
                          1. <\/b> 1xx<\/span><\/li>\n
                          2. <\/b> 2xx<\/span><\/li>\n
                          3. <\/b> 4xx<\/span><\/li>\n
                          4. <\/b> 5xx<\/span><\/li>\n<\/ol>\n

                            Correct Answer: 3. 4xx<\/b><\/p>\n

                            Explanation :-<\/b><\/p>\n

                            SMTP response codes in the 4xx class generally indicate temporary conditions. These responses tell the sending system that the requested action could not be completed at that time but may succeed later. Common examples include 421, 450, and 451. The 2xx class represents successful completion, while 5xx responses generally represent permanent failures or rejections. Understanding response classes is important when analyzing message queues because temporary 4xx responses can cause messages to remain queued for later retry, whereas permanent 5xx responses normally require a different handling path.<\/span><\/p>\n

                            Question 394. Which capability can help protect sensitive information by applying policy controls to outbound email content?<\/b><\/p>\n

                              \n
                            1. <\/b> DLP<\/span><\/li>\n
                            2. <\/b> MX lookup<\/span><\/li>\n
                            3. <\/b> HAT sender classification<\/span><\/li>\n
                            4. <\/b> DNS PTR lookup<\/span><\/li>\n<\/ol>\n

                              Correct Answer: 1. DLP<\/b><\/p>\n

                              Explanation :-<\/b><\/p>\n

                              Data Loss Prevention (DLP) can apply security policies to outbound messages based on sensitive information or defined content conditions. Depending on the configured solution and policy, messages containing sensitive data can be subject to actions such as quarantine, blocking, encryption workflows, or other administrative handling. MX lookups and PTR records support DNS functions, while HAT classifies SMTP connections. DLP is particularly useful when an organization needs to prevent sensitive information from leaving through email. Administrators should carefully define detection conditions and actions to reduce false positives while enforcing the organization’s information-protection requirements.<\/span><\/p>\n

                              Question 395. Which feature can use reputation information to help determine whether incoming senders are trustworthy?<\/b><\/p>\n

                                \n
                              1. <\/b> SenderBase reputation<\/span><\/li>\n
                              2. <\/b> LDAP cache<\/span><\/li>\n
                              3. <\/b> SMTP AUTH<\/span><\/li>\n
                              4. <\/b> DMARC <\/span>rua<\/span><\/li>\n<\/ol>\n

                                Correct Answer: 1. SenderBase reputation<\/b><\/p>\n

                                Explanation :-<\/b><\/p>\n

                                SenderBase reputation provides reputation information that can be used as part of email security and sender evaluation. Reputation information can help the Secure Email Gateway distinguish between sources with different levels of trust and can contribute to decisions about how connections or messages should be handled. LDAP caching improves directory lookup performance, SMTP AUTH provides client authentication, and the DMARC <\/span>rua<\/span> tag identifies aggregate-report destinations. Reputation-based controls should be combined with other security mechanisms because reputation is one input into mail-security decisions rather than a replacement for authentication, filtering, and policy enforcement.<\/span><\/p>\n

                                Question 396. Which configuration is most useful when different classes of inbound senders require different connection rates and limits?<\/b><\/p>\n

                                  \n
                                1. <\/b> Assign senders to appropriate HAT sender groups and apply different Mail Flow Policies<\/span><\/li>\n
                                2. <\/b> Create separate SPF records for every recipient<\/span><\/li>\n
                                3. <\/b> Disable all inbound listeners<\/span><\/li>\n
                                4. <\/b> Use DKIM selectors to control connection rates<\/span><\/li>\n<\/ol>\n

                                  Correct Answer: 1. Assign senders to appropriate HAT sender groups and apply different Mail Flow Policies<\/b><\/p>\n

                                  Explanation :-<\/b><\/p>\n

                                  HAT sender groups allow incoming connections to be classified, while Mail Flow Policies define the handling applied to each group. This combination can be used to establish different connection limits, message rates, TLS requirements, and other controls for different sender classes. SPF and DKIM are authentication mechanisms and do not provide the same connection-rate control. Disabling inbound listeners would prevent legitimate inbound mail rather than provide differentiated policy enforcement. Correct classification and policy association allow administrators to apply stricter controls to less-trusted sources while maintaining appropriate service for trusted senders.<\/span><\/p>\n

                                  Question 397. Which DMARC policy requests that messages failing DMARC be rejected by the receiving system?<\/b><\/p>\n

                                    \n
                                  1. <\/b> p=none<\/span><\/li>\n
                                  2. <\/b> p=quarantine<\/span><\/li>\n
                                  3. <\/b> p=reject<\/span><\/li>\n
                                  4. <\/b> p=monitor<\/span><\/li>\n<\/ol>\n

                                    Correct Answer: 3. <\/b>p=reject<\/b><\/p>\n

                                    Explanation :-<\/b><\/p>\n

                                    The DMARC policy <\/span>p=reject<\/span> requests that receiving systems reject messages that fail DMARC evaluation. This represents stronger enforcement than <\/span>p=none<\/span>, which is primarily used for monitoring, and <\/span>p=quarantine<\/span>, which requests suspicious treatment of failing messages. <\/span>p=monitor<\/span> is not a standard DMARC policy value. Before implementing reject enforcement, organizations commonly review authentication results and legitimate sending sources to reduce unintended impact. DMARC enforcement still depends on the receiving system’s implementation, and a message must fail the relevant DMARC evaluation rather than merely having an isolated SPF or DKIM failure.<\/span><\/p>\n

                                    Question 398. Which feature allows administrators to determine whether a message was delivered successfully after being accepted by the gateway?<\/b><\/p>\n

                                      \n
                                    1. <\/b> Message Tracking<\/span><\/li>\n
                                    2. <\/b> Recipient Access Table<\/span><\/li>\n
                                    3. <\/b> SPF<\/span><\/li>\n
                                    4. <\/b> HAT<\/span><\/li>\n<\/ol>\n

                                      Correct Answer: 1. Message Tracking<\/b><\/p>\n

                                      Explanation :-<\/b><\/p>\n

                                      Message Tracking can provide delivery-related events for individual messages after they have been accepted by the gateway. Administrators can use tracking information to determine whether the message was delivered, deferred, rejected, quarantined, or subjected to other processing actions. HAT and RAT operate primarily during connection and recipient processing, while SPF evaluates sender authorization. When a user reports that a message was accepted but never arrived, Message Tracking is useful for determining whether delivery was attempted and what response was received from the destination server.<\/span><\/p>\n

                                      Question 399. Which operational practice helps reduce the risk of unintentionally affecting production mail flow when modifying security policies?<\/b><\/p>\n

                                        \n
                                      1. <\/b> Apply multiple unrelated changes without review<\/span><\/li>\n
                                      2. <\/b> Review pending changes and commit only after verification<\/span><\/li>\n
                                      3. <\/b> Delete all existing policies before editing<\/span><\/li>\n
                                      4. <\/b> Restart the appliance after every setting<\/span><\/li>\n<\/ol>\n

                                        Correct Answer: 2. Review pending changes and commit only after verification<\/b><\/p>\n

                                        Explanation :-<\/b><\/p>\n

                                        Reviewing pending configuration changes before committing them provides an opportunity to detect incorrect settings or unintended policy modifications. Administrators can verify listeners, mail-flow policies, routing, filtering, authentication, and other affected settings before activating the changes. Applying unrelated modifications simultaneously makes troubleshooting more difficult, deleting existing policies can disrupt mail flow, and repeated restarts are unnecessary for normal configuration management. A controlled review-and-commit process is especially important for production email infrastructure because a small policy error can affect large volumes of inbound or outbound messages.<\/span><\/p>\n

                                        Question 400. An administrator needs to investigate why several outbound messages are being deferred by the same destination domain. Which combination of evidence provides the most complete starting point?<\/b><\/p>\n

                                          \n
                                        1. <\/b> Only the DKIM selector configuration<\/span><\/li>\n
                                        2. <\/b> Only the Recipient Access Table<\/span><\/li>\n
                                        3. <\/b> Message Tracking, outbound queue information, DNS\/MX results, and SMTP responses from the destination<\/span><\/li>\n
                                        4. <\/b> Only the appliance administrator account settings<\/span><\/li>\n<\/ol>\n

                                          Correct Answer: 3. Message Tracking, outbound queue information, DNS\/MX results, and SMTP responses from the destination<\/b><\/p>\n

                                          Explanation :-<\/b><\/p>\n

                                          A repeated outbound deferral should be investigated using multiple sources of operational evidence. Message Tracking can identify individual delivery attempts, queue information can show how many messages are waiting, DNS and MX results can confirm destination resolution, and SMTP responses can reveal why the remote server is delaying delivery. Looking at only one configuration element can miss the actual cause. This combined approach helps distinguish destination availability issues, DNS problems, connection restrictions, temporary SMTP failures, and policy-related conditions. Administrators can then make targeted changes based on evidence rather than modifying unrelated production settings.<\/span><\/p>\n

                                           <\/p>\n","protected":false},"excerpt":{"rendered":"

                                          View Full Cisco CCNP Security 300-720 Exam Dumps and Practice Test Dumps   Question 381. Which Secure Email Gateway feature can be used to inspect attachments for malware before a message is delivered? Recipient Access Table Attachment scanning and malware protection Host Access Table SMTP AUTH Correct Answer: 2. Attachment scanning and malware protection Explanation […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/21741"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=21741"}],"version-history":[{"count":1,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/21741\/revisions"}],"predecessor-version":[{"id":21742,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/21741\/revisions\/21742"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=21741"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=21741"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=21741"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}