Detailed Explanation:MAC filtering allows network administrators to control device access by specifying allowed MAC addresses. This prevents unauthorized devices, such as a laptop plugged into a network port, from gaining access. Reference: CompTIA Security+ SY0-701 Study Guide, Domain 2: Threats and Vulnerabilities, Section: "Network Access Control Methods".

A bastion host is a hardened system placed at a network boundary to absorb attacks and limit exposure.
When deployed to mitigate risks from zero-day vulnerabilities, it acts as a compensating control. CompTIA Security+ SY0-701 defines compensating controls as alternative safeguards used when primary controls are insufficient or unavailable-such as when no patch exists for a zero-day.
Detective controls (B) identify issues but do not reduce exposure. Operational controls (C) refer to procedural or human-driven processes. Physical controls (D) secure physical environments (e.g., locks, cameras).
Because a bastion host compensates for the lack of a patch, the correct answer is A: Compensating.

Virtual Desktop Infrastructure (VDI) allows a company to host desktop environments on a centralized server.
Offshore teams can access these virtual desktops remotely, ensuring that sensitive data stays within the company's infrastructure without the need to provide physical devices to the team. This solution is ideal for maintaining data security while enabling remote work, as all data processing occurs on the company's secure servers.
References =
* CompTIA Security+ SY0-701 Course Content: VDI is discussed as a method for securely managing remote access to company resources without compromising data security.