--Encryption is the application of a specific algorithm to data so as to alter the appearance of the data, making it incomprehensible
to those who are not authorized to see the information.
--Distributed Network-Based Application Recognition. dNBAR is NBAR used on the Cisco 7500 router with a Versatile Interface
Processor (VIP) and on the Catalyst 6500 family of switches with a FlexWAN module or serial interface processor (SIP). The
implementation of NBAR and dNBAR is identical.
--Hypertext Transfer Protocol. The protocol used by web browsers and web servers to transfer files, such as text and graphic
--Internet Assigned Numbers Authority. An organization operated under the auspices of the Internet Society (ISOC) as a part
of the Internet Architecture Board (IAB). IANA delegates authority for IP address-space allocation and domain-name assignment
to the InterNIC and other organizations. IANA also maintains a database of assigned protocol identifiers used in the TCP/IP
stack, including autonomous system numbers.
--local-area network. A high-speed, low-error data network that covers a relatively small geographic area (up to a few thousand
meters). LANs connect workstations, peripherals, terminals, and other devices in a single building or other geographically
limited area. LAN standards specify cabling and signaling at the physical and data link layers of the Open System Interconnection
(OSI) model. Ethernet, FDDI, and Token Ring are widely used LAN technologies.
--Multipurpose Internet Mail Extension. The standard for transmitting nontext data (or data that cannot be represented in
plain ASCII code) in Internet mail, such as binary, foreign language text (such as Russian or Chinese), audio, and video data.
MIME is defined in RFC 2045,
Multipurpose Internet Mail Extension (MIME) Part One: Format of Internet Message Bodies .
--Multiprotocol Label Switching. A switching method that forwards IP traffic using a label. This label instructs the routers
and the switches in the network where to forward the packets based on preestablished IP routing information.
--modular quality of service command-line interface. A CLI that allows you to define traffic classes, create and configure
traffic policies (policy maps), and then attach policy maps to interfaces. Policy maps are used to apply the appropriate quality
of service (QoS) to network traffic.
--Network-Based Application Recognition. A classification engine that recognizes and classifies a wide variety of protocols
and applications. When NBAR recognizes and classifies a protocol or application, the network can be configured to apply the
appropriate quality of service (QoS) for that application or traffic with that protocol.
--Packet Description Language Module. A file that contains Packet Description Language statements used to define the signature
of one or more application protocols.
--A feature included with NBAR. Protocol Discovery provides a way to discover the application protocols that are operating
on an interface.
--quality of service. A measure of performance for a transmission system that reflects its transmission quality and service
--RTP Control Protocol. A protocol that monitors the QoS of an IPv6 Real-Time Transport Protocol (RTP) connection and conveys
information about the ongoing session.
--Real Time Streaming Protocol. A means for enabling the controlled delivery of real-time data, such as audio and video. Sources
of data can include both live data feeds, such as live audio and video, and stored content, such as prerecorded events. RTSP
is designed to work with established protocols, such as Real-Time Transport Protocol (RTP) and HTTP.
--A protocol that uses TCP and UDP port numbers that are determined at connection time.
--A protocol that uses well-defined (predetermined) TCP and UDP ports for communication.
--The classification of network traffic by information that is contained in the packet payload, that is, information found
beyond the TCP or UDP port number.
--Transmission Control Protocol. A connection-oriented transport layer protocol that provides reliable full-duplex data transmission.
TCP is part of the TCP/IP protocol stack.
--Tunneling is an architecture that is designed to provide the services necessary to implement any standard point-to-point
--User Datagram Protocol. A connectionless transport layer protocol in the TCP /IP protocol stack. UDP is a simple protocol
that exchanges datagrams without acknowledgments or guaranteed delivery, requiring that error processing and retransmission
be handled by other protocols. UDP is defined in RFC 768,
User Datagram Protocol .
--wide-area network. A data communications network that serves users across a broad geographic area and often uses transmission
devices provided by common carriers.