Intellinet 524360 (Annex A) User Manual page 39

protocol, the interpretation of their behavior is well-defined and can be made
objectively, without confusion or misunderstanding.
PVC: A Permanent Virtual Circuit is a connection-oriented, permanent leased-
line circuit between end stations on a network over a separate ATM circuit.
RFC: Request for Comments is a document series, begun in 1969, that describes
the Internet suite of protocols and related experiments. not all RFCs describe
Internet standards, but all Internet standards are initially written up as RFCs.
RFC 1483: This refers to multi-protocol encapsulation over AAl-5. There are two
encapsulation methods for carrying network interconnect traffic over ATM AAl5:
1) llC encapsulation allows multiplexing of multiple protocols over a single ATM
virtual circuit. The protocol of a carried PdU is identified by prefixing the PdU by
an IEEE 802.2 Logical Link Control (LLC) header; 2) VC Based Multiplexing does
higher-layer protocol multiplexing implicitly by ATM virtual circuits (VCs).
Router: This is a device responsible for making decisions about which of
several paths network (or Internet) traffic will follow. To do this, it uses a routing
protocol to gain information about the network and algorithms to choose the
best route based on several criteria known as "routing metrics."
Subnet Mask: A subnet mask, which may be a part of the TCP/IP information
provided by your ISP, is a set of four numbers (e.g., 255.255.255.0) configured
like an IP address. It is used to create IP address numbers used only within a
particular network (as opposed to valid IP address numbers recognized by the
Internet, which must be assigned by InternIC).
TCP/IP, UDP: Transmission Control Protocol/Internet Protocol is the standard
protocol for data transmission over the Internet. both TCP and UdP (Unreliable
datagram Protocol) are transport-layer protocols. TCP performs proper error
detection and error recovery, and thus is reliable. UdP, on the other hand, is not
reliable. They both run on top of the IP (Internet Protocol), a network-layer protocol.
TELNET: This is the virtual terminal protocol in the Internet suite of protocols. It allows
users of one host to log into a remote host and act as normal terminal users of that host.
VCI: A Virtual Circuit Identifier is part of the ATM cell header. A VCI is a tag
indicating the channel over which a cell will travel. The VCI of a cell can be
changed as it moves between switches via signaling.
VPI: A Virtual Path Identifier is part of the ATM cell header. A VPI is a pipe for
a number of virtual circuits.
WAN: A Wide Area network connects computers located in separate areas
(e.g., different buildings, cities, countries). The Internet is a wide area network.
Web-Based Management Graphical User Interface (GUI): Many devices
support a graphical user interface that is based on the Web browser. This
means the user can use the familiar netscape or Microsoft Internet explorer to
control/configure or monitor the device being managed.
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