Samsung iES4028F Management Manual page 701

Glossary
Terminal Access Controller Access Control System Plus (TACACS+)
is a logon authentication protocol that uses software running on a central
TACACS+
server to control access to TACACS-compliant devices on the network.
Transmission Control Protocol/Internet Protocol (TCP/IP)
Protocol suite that includes TCP as the primary transport protocol, and IP as the
network layer protocol.
Trivial File Transfer Protocol (TFTP)
A TCP/IP protocol commonly used for software downloads.
User Datagram Protocol (UDP)
provides a datagram mode for packet-switched communications. It uses IP as
UDP
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.
Universal Time Coordinate (UTC)
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.
Virtual LAN (VLAN)
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.
XModem
A protocol used to transfer files between devices. Data is grouped in 128-byte
blocks and error-corrected.
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