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interface: The electrical interface between a network
terminator (NT1) device and one or more ISDN communication
devices that do not contain their own NT1s.
Secure Electronic Transaction (SET): A standard that
uses digital signatures to ensure secure credit card transactions
over the Internet.
Serial communication: Communication through the serial
port of your computer. For Windows 3.1, the maximum speed
of the serial port is 19,200. For Windows 95, the COM port
limit on the settings drop-down list is 921,600.
Serial host: A device such as a videoconferencing codec
that is connected to a serial host port communicating over
a point-to-point link. To a serial host, the MAX appears to
be a cable or DCE (Data Communications Equipment).
Secure Multipurpose Internet Mail Extension (S/MIME):
A version of the MIME protocol that supports message encryption.
Secure Sockets Layer (SSL): A protocol used to encrypt
data for transmission over the Internet. SSL uses the public-and-private
key encryption system from RSA, which also includes the use
of a digital certificate.
Segment: A discrete portion of a network, such as a
LAN, without routers or bridges. Bridges and routers can be
used to isolate network traffic to specific segments.
Serial host port module: A module on the MAX that connects
to a serial host through its serial host port.
Session: The state a connection reaches when both parties
can communicate with each other.
Serial Line Internet Protocol (SLIP): An Internet protocol
used to run IP over serial lines, such as telephone circuits,
to interconnect two systems.
Signaling types: The sending device and the receiving
device must send signals in order to synchronize their clocks
and determine where one block of data ends and the next begins.
Services use signaling types to maintain synchronization and
transfer data effectively. Signals are either analog or digital.
In-band signaling is used by POTS, where all information about
the beginning and end of a call is carried on a single line.
ISDN BRI uses two B channels to carry data and a D channel
to carry signaling data.
Server: A computer on a network that recognizes and
responds to client requests for services. These services can
range from basic file and print services to support for complex,
SIP: Short for Session Initiation Protocol, SIP is
an Internet Engineering Task Force (IETF) standard protocol
for initiating an interactive user session that involves multimedia
elements such as video, voice, chat, gaming, and virtual reality.
SIP works in the Application layer of the OSI communications
SMDS: SMDS (Switched Multimegabit Data Service) a public,
packet-based network service aimed at enterprises that exchange
large amounts of data with other enterprises over a WAN on
a non-constant or bursty basis. SMDS extends the performance
efficiencies of a LAN over a wide area on a switched, as-needed
SMTP: SMTP (Simple Mail Transfer Protocol) is a TCP/IP
protocol used in receiving and sending e-mail. However, due
to its limited ability to queue messages at the receiving
end, it is used along with POP3 or IMAP (Internet Messaging
Session layer: The fifth of seven layers in the OSI
model. The session layer sets up, coordinates, and terminates
conversations, exchanges, and dialogs between the applications
at each end. In practice, this layer is often combined with
the transport layer.
Session tracking: A way to gather detailed information
about the traffic a website gets. A session is a connection
between a client and a server. By tracking sessions, a Web
administrator can determine the number of users visiting the
site, the length of time they remain at the site, and the
sorts of demands being placed on the system.
SNMP: SNMP (Simple Network Management Protocol) is
a standard way for computers to share networking information.
In SNMP, two types of communicating devices exist: agents
and managers. An agent provides networking information to
a manager application running on another computer. The agents
and managers share a database of information, called the Management
Information Base (MIB).