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With an All-Access Pass, you get access to every current and future ITU course. Access over 2,500 hours of on-demand IT Training 24/7. With over 13,000 on-demand training videos and 19,000+ practice questions, you'll have the tools to excel in the critical IT skills needed to elevate your IT Career. Our All-Access pass is available in three affordable plans.
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Definition: Multi-Version Concurrency Control Multi-Version Concurrency Control (MVCC) is a database optimization technique that allows multiple transactions to access the same database concurrently without interfering with each other. By creating and managing different versions of each database item, MVCC enables read operations to occur without locking, thereby increasing database throughput and performance while maintaining the …
Definition: Transactional Memory Transactional Memory (TM) refers to a concurrency control mechanism that simplifies the development of concurrent programs by allowing a set of memory operations to execute in an atomic block, known as a transaction. In essence, TM aims to make the memory operations within a transaction appear as a single, indivisible operation to …
Definition: Entity Relationship Model The Entity Relationship Model (ERM) is a conceptual tool primarily used in database design and systems analysis to describe the structure of data and its components within a system. ERM enables the representation of entities, their attributes, and relationships among them in a clear and structured manner, facilitating the process of …
Definition: Layered Networking Model A Layered Networking Model is an architectural framework used to understand and implement network communication by dividing the whole process into manageable layers. Each layer serves a specific purpose and interacts with the layers directly above and below it to facilitate the smooth transmission of data across a network. This model …
Definition: Enterprise Architecture Enterprise Architecture (EA) is a strategic planning framework that organizations use to align their business vision and strategies with their information technology (IT) infrastructure, processes, and projects. It involves the detailed mapping of an organization’s business structure to its technological resources, ensuring that IT supports business goals, facilitates information flow, and optimizes …
Definition: Technical Debt Technical debt refers to the concept in software development where choosing an easier, quicker, or more cost-effective solution now can lead to additional rework later on. It accumulates when teams take shortcuts in the development process, often to meet deadlines or address immediate business needs, at the expense of future code quality …
Definition: Error Budget An error budget is a concept in site reliability engineering (SRE) that quantifies the allowable downtime or unreliability of a service within a certain period, usually calculated as a percentage of uptime. It sets a boundary between the acceptable level of risk and the need for reliability, serving as a balance between …
Definition: Liskov Substitution Principle The Liskov Substitution Principle (LSP) is one of the five SOLID principles of object-oriented design, introduced by Barbara Liskov in 1987. It states that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program. In simpler terms, a subclass must be substitutable …
What Is the Liskov Substitution Principle (LSP)? Read More »
Definition: Virtual Application Network A Virtual Application Network (VAN) is a network architecture that abstracts the complexity of managing individual network devices and provides a simplified interface for the deployment and management of applications across a network. This approach enables applications to request network resources and services dynamically, optimizing performance, scalability, and security. Understanding Virtual …
Definition: Virtual Time Virtual time is a concept used in computer simulation, distributed systems, and virtual reality to model and manage the flow of time differently from real-world or wall-clock time. It allows systems to simulate events, processes, or actions in a controlled time frame, which can be faster, slower, paused, or even reversed relative …
Definition: Kerckhoffs’s Principle Kerckhoffs’s principle is a fundamental concept in the field of cryptography and security, named after the Dutch cryptographer Auguste Kerckhoffs in the late 19th century. The principle states that a cryptographic system should be secure even if everything about the system, except the key, is public knowledge. In simpler terms, the security …
Definition: Network Slice A network slice is a concept in networking, particularly within the context of 5G and next-generation mobile networks, that refers to the logical partitioning of a single physical network into multiple, distinct, and independent virtual networks. Each of these virtual networks, or slices, is designed to provide tailored network capabilities and characteristics …
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