In a three-node OpenStack architecture, the network node consists of services from the Neutron component. OpenStack is an open-source cloud-computing platform. Each OpenStack modular component is responsible for a particular function, and each component has a code name. The following list contains several of the most popular OpenStack components:
- Nova -OpenStack Compute: manages pools of computer resources
- Neutron -OpenStack Networking: manages networking and addressing
- Cinder -OpenStack Block Storage: manages blocklevel storage devices
- Glance -OpenStack Image: manages disk and server images
- Swift -OpenStack Object Storage: manages redundant storage systems
- Keystone -OpenStack Identity: is responsible for authentication
- Horizon -OpenStack Dashboard: provides a graphical user interface (GUI)
- Ceilometer -OpenStackTelemetry: provides counterbased tracking that can be used for customer usage billing

A three-node OpenStack architecture consists of the network node, the controller node, and the compute node. The network node consists of the following Neutron services:
- Neutron Modular Layer 2 (ML2) PlugIn
- Neutron Layer 2 Agent
- Neutron Layer 3 Agent
- Neutron Dynamic Host Configuration Protocol (DHCP) Agent

The controller node consists of the following services:
- Keystone
- Glance
- Nova Management
- Neutron Server
- Neutron ML2 Plug-In
- Horizon
- Cinder
- Swift
- Ceilometer Core

The compute node consists of the following services:
- Nova Hypervisor
- Kernel-based Virtual Machine (KVM) or Quick Emulator (QEMU)
- Neutron ML2 Plug-In
- Neutron Layer 2 Agent
- Ceilometer Agent