LevelOne GTL-2691 User Manual

Page 1620

LOSSARY

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ELNET

Defines a remote communication facility for interfacing to a terminal device

over TCP/IP.

TFTP

Trivial File Transfer Protocol.

A TCP/IP protocol commonly used for software

downloads.

UDP

User Datagram Protocol. UD

provides a datagram mode for packet-

switched communications. It uses IP as the underlying transport

mechanism to provide access to IP-like services. UDP packets are delivered

just like IP packets – connection-less datagrams that may be discarded

before reaching their targets. UDP is useful when TCP would be too

complex, too slow, or just unnecessary.

UTC

Universal Time Coordinate. UTC is a time scale that couples Greenwich

Mean Time (based solely on the Earth’s rotation rate) with highly accurate

atomic time. The UTC does not have daylight saving time.

VLAN

Virtual LAN. A Virtual LAN is a collection of network nodes that share the

same collision domain regardless of their physical location or connection

point in the network. A VLAN serves as a logical workgroup with no

physical barriers, and allows users to share information and resources as

though located on the same LAN.

VRRP

Virtual Router Redundancy Protocol uses a virtual IP address to support a

primary router and multiple backup routers. The backups can be

configured to take over the workload if the master fails or to load share the

traffic. The primary goal of VRRP is to allow a host device which has been

configured with a fixed gateway to maintain network connectivity in case

the primary gateway goes down.

ODEM

A protocol used to transfer files between devices. Data is grouped in 128-

byte blocks and error-corrected.