Disabling access is an automation use case that would best enhance the security posture of an organization by rapidly updating permissions when employees leave a company. Disabling access is the process of revoking or suspending the access rights of a user account, such as login credentials, email, VPN, cloud services, etc.
Disabling access can prevent unauthorized or malicious use of the account by former employees or attackers who may have compromised the account. Disabling access can also reduce the attack surface and the risk of data breaches or leaks. Disabling access can be automated by using scripts, tools, or workflows that can trigger the action based on predefined events, such as employee termination, resignation, or transfer. Automation can ensure that the access is disabled in a timely, consistent, and efficient manner, without relying on manual intervention or human error.
References: CompTIA Security+ Study Guide: Exam SY0-701, 9th Edition, Chapter 5: Identity and Access Management, page 2131. CompTIA Security+ Certification Kit: Exam SY0-701, 7th Edition, Chapter 5:
Identity and Access Management, page 2132.

Compliance attestation (B)ensures that devices meetpredefined security policies(e.g., encryption enabled, updated antivirus, latest OS patches) before being allowed access to corporate resources. This is commonly enforced usingMobile Device Management (MDM)systems.
By using compliance checks via MDM, only secure,policy-compliantdevices are promoted from quarantine to trusted network segments.
Reference: CompTIA Security+ SY0-701 Objectives, Domain 3.2 - "MDM, NAC, and compliance enforcement: Compliance attestation before access."

Monitoring outbound traffic is essential for detecting unauthorized data exfiltration from a system. A new vulnerability that allows malware to move data unauthorizedly would typically attempt to send this data out of the network. By monitoring outbound traffic, security tools can detect unusual data transfers, trigger alerts, and help prevent the exfiltration of sensitive information.
Reference =
CompTIA Security+ SY0-701 Course Content: Domain 04 Security Operations.
CompTIA Security+ SY0-601 Study Guide: Chapter on Threat Detection and Response.

The correct answer is D because it allows only the device with the IP address 10.50.10.25 to send outbound DNS requests on port 53, and denies all other devices from doing so. The other options are incorrect because they either allow all devices to send outbound DNS requests (A and C), or they allow no devices to send outbound DNS requests (B). References = You can learn more about firewall ACLs and DNS in the following resources:
CompTIA Security+ SY0-701 Certification Study Guide, Chapter 4: Network Security1 Professor Messer's CompTIA SY0-701 Security+ Training Course, Section 3.2: Firewall Rules2 TOTAL: CompTIA Security+ Cert (SY0-701) | Udemy, Section 6: Network Security, Lecture 28:
Firewall Rules3

Counterfeit hardware is hardware that is built or modified without the authorization of the original equipment manufacturer (OEM). It can pose serious risks to network quality, performance, safety, and reliability12. Counterfeit hardware can also contain malicious components that can compromise the security of the network and the data that flows through it3. To address the risks associated with procuring counterfeit hardware, a company should conduct a thorough analysis of the supply chain, which is the network of entities involved in the production, distribution, and delivery of the hardware. By analyzing the supply chain, the company can verify the origin, authenticity, and integrity of the hardware, and identify any potential sources of counterfeit or tampered products. A thorough analysis of the supply chain can include the following steps:
Establishing a trusted relationship with the OEM and authorized resellers Requesting documentation and certification of the hardware from the OEM or authorized resellers Inspecting the hardware for any signs of tampering, such as mismatched labels, serial numbers, or components Testing the hardware for functionality, performance, and security Implementing a tracking system to monitor the hardware throughout its lifecycle Reporting any suspicious or counterfeit hardware to the OEM and law enforcement agencies Reference = 1: Identify Counterfeit and Pirated Products - Cisco, 2: What Is Hardware Security? Definition, Threats, and Best Practices, 3: Beware of Counterfeit Network Equipment - TechNewsWorld, : Counterfeit Hardware: The Threat and How to Avoid It