Glossary

Term Description
CRUD Create, read, update, and delete (CRUD) are the basic functions of persistent storage in computer programming.
entity Any piece of hardware or software that can connect to the network services provided by OpenStack Networking. An entity can use OpenStack Networking services by implementing a VIF.
IPAM Internet Protocol Address Management (IPAM) is a means of planning, tracking, and managing the Internet Protocol (IP) address space that is used in a network.
layer-2 network A virtual Ethernet network that is managed by the OpenStack Networking service. Currently, OpenStack Networking manages only Ethernet networks.
network An isolated virtual layer-2 broadcast domain that is typically reserved for the tenant who created it unless the network is configured to be shared. Tenants can create multiple networks until they reach the thresholds specified by per-tenant quotas.
plug-in A software component that implements Networking API v2.0.
port A virtual switch port on a logical network switch. Virtual instances attach their interfaces into ports. The logical port also defines the MAC address and the IP addresses to be assigned to the interfaces plugged into them. When IP addresses are associated to a port, this also implies the port is associated with a subnet, as the IP address was taken from the allocation pool for a specific subnet.
subnet An IP address block that can be used to assign IP addresses to virtual instances. Each subnet must have a CIDR and must be associated with a network. IPs can be either selected from the whole subnet CIDR or from allocation pools that can be specified by the user.
VM A virtual machine (VM) is a completely isolated guest operating system installation within a normal host operating system.
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