Glossary
Summit WM User Guide, Software Version 5.3320
Switch In networks, a device that filters and forwards packets between LAN
segments. Switches operate at the data link layer (layer 2) and sometimes
the network layer (layer 3) of the OSI Reference Model and therefore
support any packet protocol. LANs that use switches to join segments are
called switched LANs or, in the case of Ethernet networks, switched
Ethernet LANs.
syslog A protocol used for the transmission of event notification messages across
networks, originally developed on the University of California Berkeley
Software Distribution (BSD) TCP/IP system implementations, and now
embedded in many other operating systems and networked devices. A
device generates a messages, a relay receives and forwards the messages,
and a collector (a syslog server) receives the messages without relaying
them.
Syslog uses the user datagram protocol (UDP) as its underlying transport
layer mechanism. The UDP port that has been assigned to syslog is 514.
(RFC3164)
TCP / IP Transmission Control Protocol. TCP, together with IP (Internet Protocol), is
the basic communication language or protocol of the Internet. Transmission
Control Protocol manages the assembling of a message or file into smaller
packets that are transmitted over the Internet and received by a TCP layer
that reassembles the packets into the original message. Internet Protocol
handles the address part of each packet so that it gets to the right
destination.
TCP/IP uses the client/server model of communication in which a
computer user (a client) requests and is provided a service (such as sending
a Web page) by another computer (a server) in the network.
TFTP Trivial File Transfer Protocol. An Internet software utility for transferring
files that is simpler to use than the File Transfer Protocol (FTP) but less
capable. It is used where user authentication and directory visibility are not
required. TFTP uses the User Datagram Protocol (UDP) rather than the
Transmission Control Protocol (TCP). TFTP is described formally in
Request for Comments (RFC) 1350.
TKIP Temporal Key Integrity Protocol (TKIP) is an enhancement to the WEP
encryption technique that uses a set of algorithms that rotates the session
keys. TKIPs' enhanced encryption includes a per-packet key mixing
function, a message integrity check (MIC), an extended initialization vector
(IV) with sequencing rules, and a re-keying mechanism. The encryption
keys are changed (rekeyed) automatically and authenticated between
devices after the rekey interval (either a specified period of time, or after a
specified number of packets has been transmitted).
TLS Transport Layer Security. (See EAP, Extensible Authentication Protocol)
ToS / DSCP ToS (Type of Service) / DSCP (Diffserv Codepoint). The ToS/DSCP box
contained in the IP header of a frame is used by applications to indicate the
priority and Quality of Service (QoS) for each frame. The level of service is
determined by a set of service parameters which provide a three way
trade-off between low-delay, high-reliability, and high-throughput. The use
of service parameters may increase the cost of service.
Term Explanation
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