- Hot Fix (Hotfix) A quick and targeted software update designed to resolve specific issues or security vulnerabilities. Hotfixes are released as soon as a problem is identified and are often applied while the system is running, without the need for a system restart.
- HOTP (HMAC-based One-time Password)An algorithm that computes a one-time password from a shared secret key and an incrementing counter. In a security context, this provides a robust method of two-factor authentication, enhancing user verification processes by generating unique, time-based credentials that are difficult for attackers to replicate or predict, thereby protecting sensitive data and system access.
- Hot Rollover A feature of certain network devices that allows users to make changes to the device's configuration without interrupting the network traffic. It is used in networking and information technology. Examples of hot rollover include Cisco routers and switches.
- Hot Site A location that is equipped with the necessary hardware and software to quickly resume IT operations in the event of a disaster. It is used as a backup site for business continuity and disaster recovery. Examples include having a hot site set up in a different city or region, having duplicate servers and equipment on site, and regularly testing the hot site to ensure it is ready for use.
- Hot swapping Hot swapping is a method that allows the replacement or addition of computer system components without requiring a shutdown or reboot. This capability is crucial for essential systems that require high availability and minimal downtime. Hot swapping enables maintenance and upgrades, such as installing new storage drives or network cards while the system remains operational.
- Hub A network device that connects multiple computers or other network segments. In a hub-based network, the hub receives data packets and broadcasts them to all connected devices, regardless of the intended recipient. Hubs operate on the Physical Layer of the OSI model and have been largely replaced by smarter, more secure switches.
- Hybrid cloud A computing environment that combines a mix of on-premises, private cloud, and third-party, public cloud services with orchestration among these platforms. This allows organizations to benefit from the scalability and cost-effectiveness of public cloud computing while maintaining control over critical applications and sensitive data, providing a balanced approach to managing security and operational needs.
- Hybrid cryptography An approach to secure communication that combines the strengths of both symmetric and asymmetric encryption methods. The data is encrypted using a symmetric key for speed and efficiency, while the symmetric key itself is then encrypted with an asymmetric key for secure transmission. This blend of techniques allows large volumes of data to be transmitted securely and efficiently.
- Hybrid Identity as a ServiceHybrid Identity as a Service (IDaaS) refers to cloud-based solutions that manage user identities and access across both on-premises and cloud applications. It combines the advantages of on-premises identity solutions with the flexibility of the cloud, allowing users to employ a single identity or set of credentials to securely access resources regardless of location.
- Hybrid self-hostedA system configuration where part of an organization's data or services are maintained on their own servers (self-hosted) while other parts are hosted on third-party servers, often cloud services. This allows organizations to maintain control over critical or sensitive data or applications while still leveraging the scalability, accessibility, and often cost-savings associated with third-party hosted services.
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