The FREE Cybersecurity Glossary by Thor Pedersen!

Pop-Up Blocker: A function or program that prevents pop-up windows from appearing on a website or application without user permission. Pop-up windows can be intrusive, distracting, and potentially harmful if they contain malicious content or lead to unsafe websites. By using a pop-up blocker, users can browse with less interruption, enhance their online experience, and potentially increase their protection against certain web-based threats.

Port: A specific virtual point where data is exchanged between a device and the network. Each port corresponds to a unique number and specific protocol, serving as a communication endpoint for applications to exchange data using protocols like TCP or UDP. Ports enable the host device to manage multiple connections simultaneously, with each application or service using a distinct port number to avoid data mix-up.

Port Address Translation (PAT): A technique used in networking to enable multiple devices on a private network to share a single public IP address. It is commonly used in home and small business networks to conserve IP addresses and improve network efficiency. For example, a router using PAT can allow multiple devices on a home network to access the Internet using a single public IP address.

Portfolio: A collection of projects, programs, sub-portfolios, and operations managed as a group to achieve strategic objectives. An organization's technology portfolio can include a range of items such as software applications, hardware, data resources, and network infrastructure. Managing these assets in a portfolio view allows organizations to evaluate their investments comprehensively, prioritize effectively, and make informed decisions based on overall strategic goals.

Port knocking: Port knocking is a security technique that involves a series of connection attempts to a sequence of closed ports. If the correct sequence is received, the system will open a specific port or initiate some other predefined action. This "knock" acts like a secret handshake to authorize access, and because the ports are usually closed, the protected service remains invisible to port scans.

Port Scan/Scanner: A method that is used to detect open ports and services available on a network host. Sending client requests to server port addresses helps to identify vulnerabilities or confirm that security policies are functioning as expected. While it can be a valuable tool for network administrators in securing their own systems, port scanning can also be used maliciously to find weak points to exploit in unauthorized systems.