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Glossary

BIG-IP® Reference Guide Glossary - 5

FDDI (Fiber Distributed Data Interface)

FDDI is a multi-mode protocol used for transmitting data on optical-fiber

cables at speeds up to 100 Mbps.

floating self IP address

A floating self IP address is an additional self IP address for a VLAN that

serves as a shared address by both units of a BIG-IP redundant system.

forward proxy caching

Forward proxy caching is a configuration in which a BIG-IP Cache

Controller redundant system uses content-aware traffic direction to enhance

the efficiency of an array of cache servers storing Internet content for

internal users.

health check

A health check is a BIG-IP feature that determines whether a node is up or

down. Health checks are implemented through health monitors. See also

health monitor, ECV, EAV, and external monitor.

health monitor

A health monitor checks a node to see if it is up and functioning for a given

service. If the node fails the check, it is marked down. Different monitors

exist for checking different services. See also health check, EAV, ECV, and

external monitor.

hit period

The hit period specifies the period, in seconds, over which to count requests

for particular content before determining whether to change the state (hot or

cool) of the content.

If you specify a value for hot pool, but do not specify a value for this

variable, the cache statement uses a default hit period of 10 seconds. See

also cool, hot, and hot pool.

host

A host is a network server that manages one or more virtual servers that the

3-DNS Controller uses for load balancing.

hot

Hot is a term used to define frequently requested content based on the

number of requests in a given time period for a given hot content subset. See

also hot content subset.

hot content load balancing

Hot content load balancing identifies hot or frequently requested content on

the basis of number of requests in a given time period for a given hot content

subset. A hot content subset is different from, and typically smaller than, the

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