In a hybrid cloud environment, a 'Virtual Private Network (VPN)' is commonly used to ensure secure data transmission between on-premises data centers and the cloud. VPNs create encrypted communication tunnels over the public internet, enhancing security. Data encryption alone may not secure the entire transmission path.

The technology that enables one physical piece of hardware to function as multiple "logical" devices is called 'Virtualization.' It abstracts and isolates resources for efficient use.

Defense-in-Depth is a comprehensive security strategy that involves implementing multiple layers of defense mechanisms to protect an IT system, making it more resilient to various threats and attacks.

Hypervisor virtualization allows multiple operating systems (OS) to run on a single physical machine simultaneously. A hypervisor, also known as a virtual machine monitor, manages and allocates resources to each virtualized OS, enabling efficient utilization of hardware resources and facilitating tasks like testing different OS environments on a single server.

In computer architecture, the 'control unit' is responsible for managing instruction execution. It fetches, decodes, and coordinates the execution of instructions, ensuring the proper flow of data and control within the CPU.

Data Integrity Check ensures that data remains unaltered during transmission. This is typically achieved through methods like checksums or hash functions, which detect any changes in data.

'Platform as a Service (PaaS)' is a cloud computing service that provides a platform for developers to build, deploy, and manage applications without having to manage the underlying infrastructure. It abstracts hardware and allows a focus on software development.

In project management, a 'baseline' is a crucial concept. It represents a formal, approved version of a project plan, which serves as a reference point to compare and manage variances during project execution. It includes key project elements such as schedule, scope, and budget. A Gantt Chart is a visual representation of a project schedule, a Project Charter is a document that authorizes the project's existence, and a Stakeholder Register is a record of project stakeholders.

In project management, the group responsible for reviewing and deciding on proposed changes is known as the 'Change Control Board.' They evaluate the potential impact of changes on the project's scope, schedule, and budget, and determine whether to approve or deny the proposed changes. This process helps maintain project integrity.

Binary search has a time complexity of O(log n) on a sorted array. It efficiently narrows down the search space with each comparison, making it a highly efficient algorithm for searching.