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Glossary

BIG-IP® Reference Guide Glossary - 9

specific to a service type, for example, HTTP and FTP. The template has a

template type that corresponds to the service type and is usually the name of

the template.

named

Named is the name server utility, which manages domain name server

software.

NAT (Network Address Translation)

A NAT is an alias IP address that identifies a specific node managed by the

BIG-IP to the external network.

node

A node is a specific combination of an IP address and port (service) number

associated with a server in the array that is managed by the BIG-IP.

node address

A node address is the IP address associated with one or more nodes. This IP

address can be the real IP address of a network server, or it can be an alias IP

address on a network server.

node alias

A node alias is a node address that the BIG-IP uses to verify the status of

multiple nodes. When the BIG-IP uses a node alias to check node status, it

pings the node alias. If the BIG-IP receives a response to the ping, it marks

all nodes associated with the node alias as up. If the BIG-IP does not receive

a response to the ping, the it marks all nodes associated with the node alias

as down.

node port

A node port is the port number or service name that is hosted by a specific

node.

node status

Node status indicates whether a node is up and available to receive

connections, or down and unavailable. The BIG-IP uses the node ping and

health check features to determine node status.

non-cacheable content

Non-cacheable content is content that is not identified in the cacheable

content condition part of a cache rule statement.

non-transparent cache server

Cache servers that can receive requests that are destined for the cache

servers themselves are called non-transparent cache servers.

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