The FREE Cybersecurity Glossary by Thor Pedersen!

Active Directory: A directory service developed by Microsoft that provides a centralized and secure platform for managing user accounts, network resources, and access controls in a Windows environment. This concept is commonly used in enterprise IT environments to simplify users, manage permissions, and enforce security policies. Examples of Active Directory features include group policy management, authentication and authorization, and domain-based naming and organization.

Active Recovery Site (Mirrored): A disaster recovery site that is a real-time replica of the primary site, continually updated with data and transactions from the primary site. In the event of a system disruption or failure at the primary site, the active recovery site can take over almost instantly, ensuring business continuity with minimal downtime. This high-availability solution is crucial for organizations that cannot tolerate significant data loss or downtime.

Active Response: A security measure that immediately takes action to prevent or mitigate a potential threat or attack. It is commonly used in intrusion detection and prevention systems. Examples include blocking an IP address after multiple failed login attempts or shutting down a network port that is being used for a malicious attack.

Active Sniffing: A method of data interception in IT and Cybersecurity where the attacker actively inserts themselves into a network to intercept and possibly alter data packets passing through the network. Unlike passive sniffing, where the attacker is silent and only listens to network traffic, active sniffing usually involves techniques that can influence or modify the flow of data, such as ARP spoofing, DHCP attacks, or MAC flooding. Active sniffing is detectable due to the intervention in the network communication.

ActiveX: A software framework developed by Microsoft that allows for the creation of interactive web-based applications. It is commonly used in Internet Explorer and other web browsers to provide enhanced functionality and interactivity. Examples of ActiveX controls include video players, PDF viewers, and web-based games. Due to security concerns and the advent of newer technologies, the use of ActiveX has significantly declined and is supported by fewer browsers.

Address bus: A set of wires in a computer's motherboard that carries the address of a memory location to be accessed. It is used to enable communication between the CPU and memory modules. Examples include the 16-bit address bus in early PCs and the 64-bit address bus in modern computers.