The FREE Cybersecurity Glossary by Thor Pedersen!

Addressing: In the context of computer networks, addressing refers to the assignment of a unique identifier to each device or destination on the network. This identifier, also known as an IP address, allows devices to communicate with each other and route data packets to their intended destination. Examples of addressing include the use of IP addresses in the Internet Protocol (IP) to identify computers on the Internet and the use of MAC addresses in local area networks (LANs) to identify individual network devices.

Address Resolution Protocol (ARP): a networking protocol that maps a network's logical IP address to its physical MAC address. It is used to enable communication between devices on a network. Examples include ARP requests, and ARP replies in the process of resolving an IP address to a MAC address.

Address Space: The total range of IP addresses available within a given protocol, such as IPv4 or IPv6, that can potentially be assigned to devices on a network. Address space represents the pool of available addresses, not the actual assignment of addresses to devices. It ensures that each device can have a unique address for communication, but the term itself refers to the entirety of possible addresses rather than those already in use. Address space is crucial for managing and allocating network resources effectively.

Address Space Layout Randomization (ASLR): A security technique that randomly arranges the positions of key data areas of a program—including the base of the executable and position of libraries, heap, and stack—in a process's address space. By doing so, it makes it harder for an attacker to predict target addresses, thus mitigating the risk of exploitation techniques such as buffer overflow attacks. ASLR is widely used in modern operating systems to enhance their security posture.

Adequate Security: The level of security considered sufficient to protect an information system, data, or network from unacceptable losses or damage. This typically involves a balance between the potential harm caused by a security incident and the cost and effort of implementing security measures. Adequate security is often defined by regulatory requirements, industry standards, or an organization's risk tolerance and may vary depending on the nature of the assets being protected and the threat landscape.

Ad Hoc Mode: A wireless network mode where devices connect directly to each other without the use of a central access point. It is used in situations where a temporary network is needed, such as a group of friends sharing files at a party. Examples include Wi-Fi Direct, Bluetooth, and peer-to-peer networking.