What is the function of an antivirus solution?
Answer : D
The function of an antivirus solution is to detect malicious files using malware signatures and related detection methods. Signature-based detection compares files or code patterns against known malware indicators. Antivirus may also include heuristic, reputation-based, or behavioral detection, but known malware signature scanning is the classic function. Regulating traffic based on security rules is a firewall function. Protecting against DNS poisoning is handled through DNS security, secure resolver behavior, validation mechanisms, and network protections. Protecting user credentials is primarily an identity security function involving MFA, password management, phishing resistance, and access controls. Antivirus is a core endpoint security component because malicious files commonly reach users through downloads, attachments, removable media, compromised websites, or unauthorized software. It helps prevent execution, quarantine malicious content, and alert administrators. While modern endpoint platforms go beyond antivirus, the foundational antivirus role remains malware file detection and prevention on the device. Reference/topics: Endpoint Security 4.3, antivirus; Cybersecurity 1.5, threat prevention practices.
How can a meddler-in-the-middle (MITM) gain access to a mobile device?
Answer : C
A meddler-in-the-middle attack can gain access to mobile traffic by masquerading as a legitimate wireless access point. If a user's mobile device connects to the rogue access point, the attacker can position themselves between the device and the intended network or internet service. This allows the attacker to observe, redirect, manipulate, or attempt to downgrade communications, especially when applications do not properly validate encryption or certificates. Modifying a target's IP address alone does not describe the usual MITM setup. Forcing licensing updates is not a standard MITM method. Flooding packets describes denial-of-service behavior rather than interception. Rogue access points are effective because users often trust familiar network names or automatically join previously known SSIDs. Defenses include avoiding unknown Wi-Fi, using VPNs where appropriate, validating certificates, disabling auto-join, using enterprise Wi-Fi authentication, and enforcing mobile device security policies. Reference/topics: Cybersecurity 1.3, common attack types; Network Security 3.3, VPNs and proxies.
Which event would generate a false positive alert?
Answer : A
A false positive occurs when a security control identifies normal or benign activity as malicious. If a firewall categorizes a benign application as malicious, it generates an alert or enforcement decision that incorrectly indicates threat activity. That is the definition of a false positive. A network sensor being unable to identify a custom application is a visibility or classification limitation, but not necessarily a false positive unless it incorrectly labels the traffic as malicious. A tunnel switching routes may be a network event or availability issue. An employee attempting to access an unauthorized application may be a true policy violation, even if it is not malicious. False positives matter because they consume analyst time, reduce trust in alerts, and contribute to alert fatigue. SOC teams reduce false positives by tuning rules, improving context, using baselines, adding allow lists carefully, and refining detection logic. Reference/topics: Security Operations 6.4, false positive and false negative alerts; Network Security 3.2, firewall policy enforcement.
Which security control is best suited to block traffic based on the actual application being used rather than only the port number?
Answer : B
A next-generation firewall is best suited to block or allow traffic based on the actual application being used rather than only the port number. Traditional firewalls commonly rely on IP addresses, protocols, and ports, which is insufficient when many applications use common ports such as TCP 80 or TCP 443. A next-generation firewall adds application awareness, allowing it to identify traffic based on application behavior and enforce more precise security policy. A hub operates at OSI Layer 1 and simply repeats signals; it cannot inspect applications. A DHCP server assigns IP configuration information to clients and does not enforce application-based security policy. A Layer 2 switch forwards frames based on MAC addresses and does not determine whether a specific application should be allowed. Application-aware policy is important because attackers and risky applications often hide within allowed ports. NGFWs help security teams control traffic according to business intent, application risk, user identity, and threat context. Reference/topics: Network Security, stateful firewalls, next-generation firewalls, application awareness.
What is the purpose of an API?
Answer : D
An API, or application programming interface, allows software applications and services to communicate and share data in a structured way. APIs define how requests are made, what data formats are accepted, what operations are available, and how responses are returned. In cloud and modern application environments, APIs are fundamental because applications often rely on microservices, third-party integrations, identity providers, automation tools, and cloud management platforms. APIs do not allow operating systems to redesign themselves. They are not specifically for machine learning models to check datagrams, and they are not primarily hardware modification controls. From a security perspective, APIs must be protected because they expose application functions and data paths. API security includes authentication, authorization, rate limiting, input validation, logging, and secrets protection. If poorly secured, APIs can expose sensitive data or allow unauthorized actions. Reference/topics: Cloud Security 5.4, common cloud terms including API and microservice; Identity Security 7.4, secrets management.
What is a function of a cloud-native security platform (CNSP)?
Answer : A
A cloud-native security platform protects cloud-native applications across their lifecycle, including runtime. Runtime protection means monitoring and securing workloads while they are actively running, such as containers, microservices, serverless functions, Kubernetes clusters, and cloud workloads. This can include detecting suspicious process behavior, enforcing workload policies, identifying misconfigurations, controlling network connections, and responding to active threats. Cost analysis may exist in cloud management platforms, but it is not a core CNSP security function. Sandboxing ransomware is a malware analysis technique, not the defining role of a cloud-native security platform. Penetration testing may be part of security assessment, but CNSP is designed for continuous visibility, posture, identity, workload, and runtime security rather than one-time offensive testing. CNSP matters because cloud-native environments are dynamic: workloads scale, containers are replaced, APIs interact continuously, and identities drive access. Security must therefore be integrated into build, deploy, and runtime phases. Reference/topics: Cloud Security 5.5, CNSP; Cloud Security 5.4, containers, microservices, APIs.
What is a security-related purpose of a web proxy server?
Answer : B
A web proxy server acts as an intermediary between user systems and the internet. From a security perspective, this allows the organization to inspect, filter, log, and control web requests before they reach external destinations. A proxy can enforce acceptable use policies, block malicious or prohibited websites, apply authentication, inspect content, and reduce direct exposure between internal clients and external servers. Load balancing distributes traffic across servers but is not the core security purpose of a web proxy. Updating host licensing is unrelated. Caching may improve performance, but the question asks for a security-related purpose, and intermediary enforcement is the strongest answer. Web proxies are commonly paired with URL filtering, malware scanning, data loss prevention, and user identity policies. They are valuable because much modern attack activity starts through web access, phishing links, drive-by downloads, or unauthorized cloud services. Reference/topics: Network Security 3.3, proxies and URL filtering; Network Security 3.6, enterprise browsers.