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F
failback
The process of moving resources, either individually or in a group, back to their preferred node after the node has failed and come back online.See also node.
failover
In server clusters, the process of taking resource groups offline on one node and bringing them online on another node. When failover occurs, all resources within a resource group fail over in a predefined order; resources that depend on other resources are taken offline before, and are brought back online after, the resources on which they depend.See also node.See also server cluster.
FAT
See file allocation table (FAT).
fat server
In a client/server architecture, a server that performs most of the processing, with the client performing little or no processing.
FAT32
A derivative of the file allocation table (FAT) file system. FAT32 supports smaller cluster sizes and larger volumes than FAT, which results in more efficient space allocation on FAT32 volumes.See also file allocation table (FAT).
fault tolerance
The ability of computer hardware or software to ensure data integrity when hardware failures occur. Fault-tolerant features appear in many server operating systems and include mirrored volumes, RAID-5 volumes, and server clusters.See also cluster.
file allocation table (FAT)
A file system used by MS-DOS and other Windows operating systems to organize and manage files. The file allocation table is a data structure that Windows creates when you format a volume by using FAT or FAT32 file systems. Windows stores information about each file in the file allocation table so that it can retrieve the file later.See also NTFS file system.
File Transfer Protocol (FTP)
A member of the TCP/IP suite of protocols, used to copy files between two computers on the Internet. Both computers must support their respective FTP roles: one must be an FTP client and the other an FTP server.See also Transmission Control Protocol/Internet Protocol (TCP/IP).
filter
For Indexing Service, software that extracts content and property values from a document to index them.For Internet Protocol security (IPSec), a specification of Internet Protocol (IP) traffic that provides the ability to trigger security negotiations for a communication based on the source, destination, and type of IP traffic.For Internet Information Services (IIS), a feature of Internet Server Application Programming Interface (ISAPI) that allows preprocessing of requests and postprocessing of responses, permitting site-specific handling of Hypertext Transfer Protocol (HTTP) requests and responses.In IP and Internetwork Packet Exchange (IPX) packet filtering, a definition in a series of definitions that indicates to the router the type of traffic allowed or disallowed on each interface.See also Internet Information Services (IIS).See also Internet Protocol (IP).See also Internet Protocol security (IPSec).See also Internet Server Application Programming Interface (ISAPI).
firewall
A combination of hardware and software that provides a security system for the flow of network traffic, usually to prevent unauthorized access from outside to an internal network or intranet. Also called a security-edge gateway.
See also proxy server.
forest
One or more Active Directory domains that share the same class and attribute definitions (schema), site and replication information (configuration), and forest-wide search capabilities (global catalog). Domains in the same forest are linked with two-way, transitive trust relationships.See also Active Directory.See also domain.
FORTEZZA
A family of security products including PCMCIA-based cards, compatible serial port devices, combination cards (such as FORTEZZA/Modem and FORTEZZA/Ethernet), server boards, and others. FORTEZZA is a registered trademark held by the U.S. National Security Agency.
frame
In synchronous communication, a package of information transmitted as a single unit from one device to another.
FTP
See File Transfer Protocol (FTP).
