U

Ubuntu: An open-source, user-friendly distribution that is widely used in security and other

UDP Scan: UDP scans perform scans to determine which UDP ports are open.

Uncontrolled Zone: The portion of the network outside the organization

Unicast: Broadcasting from host to host.

Unified Extensible Firmware Interface (UEFI): A microchip that contains loading instructions for the computer and replaces BIOS on more modern systems

Uniform Resource Identifier (URI): The generic term for all types of names and addresses that refer to objects on the World Wide Web.

Uniform Resource Locator (URL): The global address of documents and other resources on the World Wide Web. The first part of the address indicates what protocol to use, and the second part specifies the IP address or the domain name where the resource is located. For example, https://cybernewslive.com.

Unix: A popular multi-user, multitasking operating system developed at Bell Labs in the early 1970s. Created by just a handful of programmers, Unix was designed to be a small, flexible system used exclusively by programmers.

unwanted communication

USB Baiting: An attack in which a threat actor strategically leaves a malware USB stick

User: A person, organization entity, or automated process that accesses a system, whether authorized to do so or not.

User Contingency Plan: A user contingency plan is the alternative method of continuing business operations if IT systems are unavailable.

User Datagram Protocol (UDP): A communications protocol that, like TCP, runs on top of IP networks. Unlike TCP/IP, UDP/IP provides very few error recovery services, offering instead a direct way to send and receive datagrams over an IP network. It’s used primarily for broadcasting messages over a network. UDP uses the Internet Protocol to get a datagram from one computer to another but does not divide a message into packets (datagrams) and reassemble it at the other end. Specifically, UDP doesn’t provide sequencing of the packets that the data arrives in.

User Datagram Protocol (UDP): A connectionless protocol that does not establish a connection between devices before transmissions

User Interface: A program that allows the user to control the functions of the operating system

User Provisioning: The process of creating and maintaining a user’s digital identity

User: The person interacting with a computer

User-defined Function: A function that programmers design for their specific needs