An overview of all technical terms
| Captive Portal: | Web-based login page used to authenticate users or display terms of use before granting access to a Wi-Fi or network connection. |
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| Carrier-Grade NAT (CGNAT): | Networking technology that enables internet service providers to connect multiple customer connections to the internet through a shared public IPv4 address. |
| Central Processing Unit (CPU): | Refers to the central processing unit of a computer. |
| Certificate Management: | Management of digital certificates throughout their lifecycle to support secure authentication and encrypted communication across IT systems. |
| Change Advisory Board (CAB): | IT service management committee responsible for assessing, prioritising and coordinating planned changes to IT systems and infrastructures. |
| Change Request (CR): | Formal request for a planned modification to an IT system, IT service or existing IT infrastructure. |
| Channel Planning: | Strategic planning and allocation of wireless channels to reduce interference and optimise Wi-Fi performance. |
| CIA Triad: | Fundamental information security model based on protecting the confidentiality, integrity and availability of data and IT systems. |
| Cisco Discovery Protocol (CDP): | Cisco network protocol for automatically discovering directly connected Cisco devices and exchanging basic device information. |
| Cisco Excess Program: | Programme for distributing surplus genuine Cisco hardware from excess inventory through designated sales channels. |
| Cisco Refresh Program: | Manufacturer programme for professionally remanufactured and tested Cisco hardware prepared for reuse in IT infrastructures. |
| Classless Inter-Domain Routing (CIDR): | Method for flexibly dividing and addressing IP networks independently of the fixed network classes used in earlier networking architectures. |
| Client-Management: | Covers the centralized management of endpoint devices. |
| Client-Server Model: | Network architecture in which central systems provide services or resources that connected end devices request and use. |
| Client-server technology: | Network architecture in which central servers provide services that are requested by clients. |
| Cloud Access Security Broker (CASB): | Security solution for monitoring and controlling cloud service usage while protecting data and user access. |
| Cloud Computing: | Provision of IT resources such as computing power, storage, applications and network services through a flexible IT infrastructure. |
| Cloud Hosting: | Hosting model in which websites, applications and data operate on flexibly scalable resources within a cloud infrastructure. |
| Cloud Networking: | Provision and management of network functions through cloud services instead of local infrastructure. |
| Cloud Telephony: | Telephony over the internet in which the phone system is operated as a service in a data centre. |
| Co-Channel Interference (CCI): | Wireless interference that occurs when multiple Wi-Fi devices or access points use the same radio channel simultaneously. |
| Common Gateway Interface (CGI): | Describes an interface for running programs on web servers. |
| Common Vulnerabilities and Exposures (CVE): | Standardised catalogue for uniquely identifying and naming publicly known security vulnerabilities in software, hardware and IT systems. |
| Common Vulnerability Scoring System (CVSS): | Standardised scoring system for assessing the severity of security vulnerabilities based on technical characteristics and defined evaluation criteria. |
| Conference system: | Technical solution for audio and video conferencing between multiple participants and locations. |
| Configuration Drift: | Unintended deviation of the actual configuration of IT systems from a previously defined and desired target state. |
| Configuration Management Database (CMDB): | Central database for the structured documentation and management of IT components and their relationships within an IT infrastructure. |
| Contact Center Manager (CCM): | Refers to a system for centralized management of communication solutions. |
| Container Network Interface (CNI): | Standardised interface for configuring and managing network connectivity for containers within container-based IT environments. |
| Continuous Integration/Delivery Code (CI/CD): | Automated software development approach for continuously integrating, testing and delivering code changes. |
| Controller: | Central instance that controls, configures and monitors connected components. |
| Cyber Resilience: | Ability of organisations and IT systems to withstand cyberattacks and IT disruptions while maintaining or rapidly restoring critical business operations. |
| Cybercrime: | Describes criminal activities involving digital technologies. |
| Cybersecurity: | Protection of IT systems, networks and data against cyberattacks, unauthorised access, manipulation and digital threats. |