SkillTestPro | CCNP Security 300-745 SDSI Practice Test 10

CCNP Security 300-745 SDSI Practice Test 10 (Hard) - Firewall-Based Application Protection Using Flow and Application Data

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1 / 10

Which capability allows a firewall to make more accurate application protection decisions by using actual observed traffic flow and application-layer data rather than relying solely on static IP/port rules?

Assuming every application uses a fixed, unchanging destination IP address that never varies

Relying exclusively on the assumption that a given port number always corresponds to exactly one specific application

Disabling all traffic classification capability to simplify firewall rule management

Relying solely on a manually maintained spreadsheet of application names with no automated classification

Removing all visibility into flow data to reduce the firewall's processing overhead

Application visibility and control, which classifies traffic by actual application identity and behavior (using techniques such as deep packet inspection) rather than assuming application identity from port number alone

2 / 10

Which design practice would help a firewall correctly enforce policy for a business-critical SaaS application that shares the same destination IP ranges and ports (such as HTTPS/443) as many other, less-trusted websites?

Relying solely on the source IP address of internal users with no server-side application identification at all

Using application-layer identification (such as SNI/TLS fingerprinting or API-based cloud application signatures) rather than relying on IP address or port alone to distinguish the specific SaaS application from other HTTPS traffic

Blocking all HTTPS traffic on port 443 entirely, including the business-critical SaaS application itself

Assuming any traffic using port 443 must automatically be the business-critical SaaS application with no further verification

Allowing all traffic on port 443 unconditionally with no distinction between the SaaS application and any other website

Disabling TLS inspection entirely, removing any visibility into which specific application is being accessed

3 / 10

Which benefit does correlating firewall flow data with application performance and usage patterns provide when designing application protection policy?

It eliminates the need for any firewall rule to ever be defined for the application

It allows the design team to understand actual traffic patterns and dependencies for the application, reducing the risk of writing overly permissive or overly restrictive firewall rules based on assumptions rather than observed behavior

It automatically negotiates a lower cloud hosting bill for the application's infrastructure

It guarantees that the protected application will never experience any downtime once flow correlation is enabled, under normal operating conditions, under normal operating conditions, which is not the standard approach, which does not align with best practices

It physically relocates the application's servers to a more secure data center

It automatically rewrites the application's underlying source code to eliminate all vulnerabilities

4 / 10

Which risk would most likely result from a firewall design that relies solely on static port-based rules to protect an application that increasingly uses dynamic or non-standard ports for legitimate functionality?

Relying solely on port-based rules would have no impact whatsoever on the accuracy of application protection policy

The organization's DNS infrastructure would automatically fail as a direct result of using static port-based rules

Relying solely on port-based rules would automatically improve the accuracy of application identification over time

Legitimate application traffic using non-standard ports could be blocked, or alternatively, malicious traffic disguised on an allowed standard port could be permitted, since port-based rules cannot distinguish traffic by actual application identity

Static port-based rules would automatically adapt to any dynamic port usage with no administrator involvement

Static port-based rules would automatically block 100% of malicious traffic while permitting all legitimate traffic

5 / 10

Which factor would most influence how granular a design team makes application-aware firewall policy for a given business-critical application (such as permitting specific application functions versus the entire application broadly)?

The font used in the organization's internal newsletter

The specific brand of coffee served in the network operations center

The number of parking spaces available at the organization's headquarters, in most deployment scenarios, which does not align with best practices, though this is not generally recommended, under normal operating conditions

The color scheme configured for the firewall management console

The average outdoor temperature at the organization's headquarters

The sensitivity of the specific functions or data flows within the application and the organization's tolerance for the operational complexity that finer-grained, function-level policy introduces

6 / 10

Which use case illustrates how flow data (such as NetFlow-style records) complements deep packet inspection when designing firewall-based application protection?

Deep packet inspection alone already provides complete network-wide traffic volume visibility equivalent to flow data

Flow data is only relevant for guest network traffic and has no bearing on application protection design

Flow data provides efficient, high-level visibility into traffic volume, direction, and endpoints across the whole network to identify anomalous patterns worth deeper investigation, while deep packet inspection provides detailed, resource-intensive application-layer classification for the traffic selected for closer analysis

Flow data and deep packet inspection cannot be used together within the same firewall design

Flow data alone already provides complete application-layer payload visibility equivalent to deep packet inspection

Flow data and deep packet inspection are simply two different names for the exact same identical technique with no distinction, based on standard platform behavior, based on standard platform behavior, which is inconsistent with expected behavior, which is rarely the correct choice, based on standard platform behavior, under normal operating conditions

7 / 10

Which combination of design practices would provide accurate, effective firewall-based application protection using flow and application data for a large enterprise?

Applying application-layer identification only to inbound traffic while leaving all outbound traffic unclassified

Reviewing firewall rules only once, at initial deployment, with no subsequent adjustment as the application evolves

Deploying application-layer identification rather than relying on IP/port alone, correlating flow data with observed usage patterns before writing policy, and periodically reviewing rules as application behavior and dependencies evolve

Disabling flow data collection entirely to reduce the firewall's storage and processing requirements

Relying exclusively on static IP and port-based rules with no application-layer identification capability at all, in accordance with common design practices, which is not the standard approach, though this is not generally recommended, which is not the standard approach

Writing firewall policy based purely on assumptions about application behavior with no flow data correlation involved

8 / 10

Which troubleshooting step would be appropriate if an application-aware firewall policy begins misclassifying a business-critical application's traffic as a different, lower-trust application after a recent application update?

Review whether the application update changed its network behavior (such as TLS fingerprint, API endpoints, or traffic signature) in a way that no longer matches the firewall's existing application signature, and update the signature or policy accordingly

Assume the issue is caused by the phase of the moon

Assume the issue is unrelated to the application update and only check the office's physical air conditioning system

Immediately disable all application-aware classification for the firewall as the first troubleshooting step

Assume application-aware classification is a deprecated capability no longer supported by any firewall platform

Assume the issue is caused by the network administrator's choice of desktop wallpaper

9 / 10

Which statement accurately describes why application-aware firewall policy (using flow and application data) is considered more effective than traditional IP/port-based policy for protecting modern applications?

Application-aware policy and IP/port-based policy are simply two different names for the exact same identical enforcement mechanism with no distinction, which is inconsistent with expected behavior, in most deployment scenarios, based on standard platform behavior, in accordance with common design practices

IP/port-based policy already provides complete and accurate application identification for any modern application with no limitation

Application-aware policy eliminates the need for any Layer 3/4 filtering capability whatsoever

Application-aware policy is only relevant for guest network traffic and has no bearing on business-critical application protection

Modern applications increasingly share infrastructure, use dynamic ports, and rely on encrypted transport, making IP/port alone an unreliable indicator of application identity, whereas application-layer data enables policy based on the application's actual observed identity and behavior

IP/port-based policy and application-aware policy cannot be used together within the same firewall deployment

10 / 10

Which combination of practices would help a design team maintain accurate application-aware firewall protection as business-critical applications are updated and evolve over time?

Updating policy only once per year regardless of how frequently the application vendor releases updates

Ignoring classification drift entirely since firewall signatures are assumed to remain accurate indefinitely

Defining application signatures once at initial deployment and never revisiting them regardless of how the application evolves, in accordance with common design practices, which is not the standard approach, in a properly maintained environment

Disabling signature validation entirely once the firewall is initially considered correctly configured

Periodically validating application signatures against current application versions, monitoring for classification drift or misclassification events, and updating policy promptly when application vendors change network behavior

Assuming application vendors never change network behavior in any future update

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