Glossary f

A field in an data link protocol trailer that allows the receiver of a frame to determine whether the frame had errors during transmission.

Defined by IEEE 802.3u, FE specifies Ethernet with a transmission speed of 100 Mbps.

A particular part of a header or trailer in which a specific piece of information is carried. For instance, the Ethernet destination address field in an Ethernet header is a field inside the header.

A process that a computer uses to look for a file, find it, and give the data inside the file to an application program.

A computer that performs file services.

The process by which one computer, typically called a file server, keeps files on its disk drive and allows other computers to read and write the files by using the network.

A network application that allows a user to copy files from one computer to another. Whereas download usually means copying into a computer, file transfer typically means the file can be copied in either direction between two computers.

A process that a computer uses to replace an existing file's content.

A networking device that sits in the path through which packets are forwarded, examining the packets, and allowing only the packets that are determined to be acceptable based on the security policy of a network.

The process whereby a switch forwards a frame out all ports except the port in which the frame arrived at the switch.

A series of IP packets that go from one IP host to another, and vice versa. Sometimes used as a generic term to refer to a TCP connection.

The process of acknowledging data by setting the acknowledgement field to the next byte of data that should be received, as opposed to setting the acknowledgement field to the last byte of data that was received.

A term referring to a switch's decision to forward a frame on one port, and not to forwardin other words, to filterthe frame on other ports.

When this term is used in the context of IP routing, it refers to the process of matching a router's routing table and making a decision of where to forward the packet.

A bunch of bits that includes some data in the middle, with a header in front of the data, and a trailer after the data. This term specifically refers to headers and trailers as defined by OSI data link layer protocols.

A data link layer protocol defined in part by the Frame Relay Forum, ANSI, and the ITU. These protocols define how routers and service providers together create Frame Relay networks.

A vendor consortium that defined the earliest Frame Relay protocols, before ANSI and ITU created Frame Relay standards.

The cabling and equipment that together create the capability to forward Frame Relay frames between two devices.

A telco-provided service that creates PVCs between pairs of customer sites.

A business, typically a telco, that provides Frame Relay services.

A generic term referring to a type of equipment, found in the COs of Frame Relay service providers, that can be configured to forward Frame Relay frames.

The number of times per second for which a repetitive electrical signal repeats itself.

A TCP/IP protocol specification used to allow file sharing by copying files to and from a server.

Software, running on an end user computer, that provides a user interface to the end user to get files to and from an FTP server. It also implements the FTP application layer protocols required to transmit and receive the e-mail.

A connection between an FTP client and server over which the client sends all control information, such as changing the directory, naming the file, and requesting a GET or a PUT operation.

A connection between an FTP client and server over which the actual data is transferred.

Software, running on some server computer hardware, that allows FTP clients to connect to it for the purpose of getting files from the server and putting files on the server so that others can come and get them.

The process of both sending and receiving data on a physical interface at the same point in time.

In Frame Relay, a network in which all pairs of Frame Relay-connected devices have a PVC between them.