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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.
ITU provides a vast array of IT-focused on-demand training designed to help you excel in both entry-level and advanced IT skills. Browse our most popular training or take a deper dive into our robust catalog of training categories.
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CompTIA
Train for a globally recognized IT certification with our comprehensive CompTIA courses.
A+ | Network+ | Security+
Cybersecurity
Master the art of combating cybersecurity threats and become a cyber hero.
Ethical Hacking (CEH) | CISSP | CISM
Cloud Computing
An essential skill set in today's IT environments. Learn cloud computing platforms
Azure Administrator | Google Cloud | AWS Practitioner
Project Management
Key to successful projects, learn the skills and methodolgy behind project management.
PMP | Risk Mgmt | Agile PM
Adobe
Business & Management
Cisco
Cloud Computing
CompTIA
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Microsoft
Microsoft Office
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Definition: External Database An external database is a database that is hosted and maintained outside of an organization’s main system or infrastructure. It can be managed by third-party services, residing on off-site servers, which can be accessed via the internet or other networks. External databases are often used to extend the capabilities of internal systems, …
Definition: Distributed Database A distributed database is a database in which storage devices are not all attached to a common processor. It may be stored in multiple computers, located in the same physical location, or dispersed over a network of interconnected computers. Unlike a centralized database, the distributed database is managed such that it appears …
Definition: Operational Data Store (ODS) An Operational Data Store (ODS) is a database designed to integrate data from multiple sources for additional operations such as reporting, analysis, and auditing, while ensuring that operational systems are not disrupted by these activities. An ODS provides a centralized, integrated, and up-to-date view of an organization’s data that is …
Definition: Lambda Architecture Lambda Architecture is a data-processing architecture designed to handle massive quantities of data by providing a robust method to ingest, process, and analyze data with both a batch and a real-time processing method. This architecture is particularly beneficial in scenarios where both large-scale and real-time analysis need to be merged to provide …
Definition: Routing Table A routing table is a set of rules, often viewed as a table, stored in a router or a networked computer, that lists the routes to particular network destinations. The routing table contains information about the topology of the network immediately around it. The primary function of a routing table is to …
Definition: Log-Structured Merge-tree (LSM-tree) A Log-Structured Merge-tree (LSM-tree) is a data structure primarily used for writing and reading data in write-intensive applications. It is designed to optimize systems that require high write throughput, such as large-scale database management systems and NoSQL databases. The LSM-tree achieves its efficiency by first writing inserts, updates, and deletions to …
Definition: Data Index A data index is a data structure that improves the speed of data retrieval operations on a database table at the cost of additional writes and storage space to maintain the index data structure. Indexes are used to quickly locate data without having to search every row in a database table every …
Definition: Hash Map A hash map is a data structure that stores key-value pairs. It uses a hash function to compute an index into an array of buckets or slots, from which the desired value can be found efficiently. Similar to hash tables, hash maps are designed to optimize the lookup time of a value …
Definition: Hash Table A hash table is a data structure that implements an associative array abstract data type, a structure that can map keys to values. Hash tables use a hash function to compute an index into an array of buckets or slots, from which the desired value can be found. This mechanism allows for …
Definition: Job Queue A job queue is a data structure used for job scheduling in computing, where jobs, tasks, or processes are kept in order while they await execution. Job queues help manage and optimize the order and time that processes are executed by a scheduler, typically within an operating system or a more specialized …
Definition: Inode An inode (index node) is a data structure in Unix-like file systems that stores information about a file or a directory. This information includes metadata about the file, such as its size, owner, permissions, and disk location. Every file or directory is uniquely identified by an inode, and the inode itself is identified …
Definition: License Key A license key, also known as a product key, is a specific software-based key for a computer program. It certifies that the copy of the program is original and has been legally acquired. This alphanumeric code is used to activate and operate the software, ensuring that it is not copied or used …
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