Glossary

centron’s ccloud³ VMs are virtual machines (VMs) that run on virtualised hardware. Every ccloud³ VM you create is a new server that you can use either on its own or as part of a larger, cloud-based infrastructure.

This glossary defines the key concepts behind the ccloud³ VMs to give you a better understanding of how ccloud³ VMs work and to help you understand what the documentation is referring to when it uses certain terms.

Container distribution

A container distribution is a Linux-based operating system that is optimised for managing containerised applications.

CPU

The central processing unit, also known as the processor or CPU, is an essential component of computer hardware that executes the instructions of a computer programme.

DDoS attack

Distributed Denial-of-Service (DDoS) attacks are a type of cyberattack in which attackers overwhelm servers, routers, load balancers or applications with incoming connections in order to render them inaccessible.

Endpoint

An endpoint is a specific URL or network address that a client device or application uses to interact with a server or service.

Hop

A hop is the transmission of a packet from one network to another in order to reach a destination.

Hypervisor

A hypervisor is a virtual machine monitor (VMM) that enables multiple operating systems to run simultaneously on a host computer.

IP

The Internet Protocol (IP) is a communication protocol used to connect computers, particularly on the internet.

IPv6

IPv6, or Internet Protocol Version 6, is a network protocol that assigns IP addresses to devices on a network.

Linux

Linux is a family of open-source operating systems (OS) based on the Linux kernel.

Mesh VPN

Mesh Virtual Private Networks (Mesh VPNs) are a peer-to-peer architecture in which every node or peer in the network can be connected directly to one another.

Mounting

When a device is mounted, the data on a storage device, such as block storage, is made available to a computer’s file system

Multicast IP Routing

Multicast Internet Protocol (IP) routing, or multicast traffic, is a protocol for distributing data to multiple recipients.

NVMe

Non-Volatile Memory Express, or NVMe for short, is an optimised and scalable storage protocol that connects a host system to its storage subsystems.

OS

An operating system, or OS, is a type of system software that manages computer hardware and software resources.

Overlay Network

An overlay network is a network in which all nodes correspond to nodes in an underlying network and are connected by logical or virtual links.

Packet Loss

Packet loss occurs when one or more packets (small units of data) fail to reach their destination.

Port

A port is a communication endpoint of a network connection.

PTR Record

PTR records, or pointer records (also known as reverse DNS or rDNS records), map an IP address to a domain name.

RAM

Random-Access Memory, or RAM, is a type of memory used for short-term storage and access.

Site-to-Site VPN Gateway

A site-to-site Virtual Private Network (VPN) is a network configuration in which two or more networks are connected privately.

SSD

A solid-state drive, or SSD, is a non-volatile data storage device.

SSH

SSH (Secure Shell Protocol) is a method for securing remote logins and communication between computers.

ssh/config

ssh/config is an OpenSSH client configuration file that contains SSH data from command-line options, user configuration files and system-wide configuration files.

Tag

Tags are keywords associated with resources to facilitate the management of resource ownership and to support the organisation of searches and actions relating to resources.

TCP

The Transmission Control Protocol (TCP) is a communication standard that enables programmes and computing devices to Exchange messages over a network.

UDP

The User Datagram Protocol, or UDP, is a well-established protocol for low-latency communication between applications.

vCPU

A virtual central processing unit, virtual processor or vCPU is a physical CPU allocated to a virtual machine (VM).

Virtual Machine

A virtual machine, or VM, is a self-contained virtualisation of an operating system.