Appendix C:
Glossary
NGSME24G4S User Manual | 386
message is divided into the packets that IP manages and for reassembling the packets back
into the complete message at the other end.
Common network applications that use TCP include the World Wide Web (WWW), e-mail,
and File Transfer Protocol (FTP).
TELNET
TELNET is an acronym for
TEL
etype
NET
work. It is a terminal emulation protocol that uses
the Transmission Control Protocol (TCP) and provides a virtual connection between TELNET
server and TELNET client.
TELNET enables the client to control the server and communicate with other servers on the
network. To start a Telnet session, the client user must log in to a server by entering a valid
username and password. Then, the client user can enter commands through the Telnet
program just as if they were entering commands directly on the server console.
TFTP
TFTP is an acronym for
T
rivial
F
ile
T
ransfer
P
rotocol. It is transfer protocol that uses the User
Datagram Protocol (UDP) and provides file writing and reading, but it does not provide
directory service and security features.
ToS
ToS is an acronym for
T
ype
o
f
S
ervice. It is implemented as the IPv4 ToS priority control. It is
fully decoded to determine the priority from the 6-bit ToS field in the IP header. The most
significant 6 bits of the ToS field are fully decoded into 64 possibilities, and the singular code
that results is compared against the corresponding bit in the IPv4 ToS priority control bit
(0~63).
TLV
TLV is an acronym for
T
ype
L
ength
V
alue. A LLDP frame can contain multiple pieces of
information. Each of these pieces of information is known as TLV.
U
UDP
UDP is an acronym for
U
ser
D
atagram
P
rotocol. It is a communications protocol that uses
the Internet Protocol (IP) to exchange the messages between computers.
UDP is an alternative to the Transmission Control Protocol (TCP) that uses the Internet
Protocol (IP). Unlike TCP, UDP does not provide the service of dividing a message into
packet datagrams, and UDP doesn't provide reassembling and sequencing of the packets.
This means that the application program that uses UDP must be able to make sure that the
