Cisco CRS-1 - Carrier Routing System Router Getting Started Manual page 276

Glossary
U
User Datagram Protocol. Connectionless transport layer protocol in the TCP/IP protocol stack. UDP is
UDP
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.
Message sent to a single network destination.
unicast
A unicast transmission sends one copy of each packet to each member of the group. This method is
unicast
transmission inefficient because the same information must be carried multiple times, requiring extra bandwidth.
V
vertical cavity surface emitting laser.
VCSEL
Virtual Private Network. Enables IP traffic to travel securely over a public TCP/IP network by
VPN
encrypting all traffic from one network to another. A VPN uses "tunneling" to encrypt all information
at the IP level.
W
Weighted Random Early Detection. Queueing method that ensures that high-precedence traffic has
WRED
lower loss rates than other traffic during times of congestion.
X
extensible markup language. A standard maintained by the World Wide Web Consortium (W3C) that
XML
defines a syntax that lets you create markup languages to specify information structures. Information
structures define the type of information, for example, subscriber name or address, not how the
information looks (bold, italic, and so on). External processes can manipulate these information
structures and publish them in a variety of formats. XML allows you to define your own customized
markup language.
A process on the Cisco CRS-1 Series router that is sent XML requests by XML clients and is
XML agent
responsible for carrying out the actions contained in the request and returning an XML response back
to the client. The XML Agent for CORBA is an example of an XML agent provided on the Cisco CRS-1
Series router.
An external application that sends an XML request to the Cisco CRS-1 Series router and receives XML
XML client
responses to those requests.
A portion of an XML request that specifies an operation that the XML client would like the XML agent
XML operation
to perform.
The Cisco CRS-1 Series router code that carries out a particular XML operation including parsing the
XML operation
provider operation XML, performing the operation, and assembling the operation XML response
Cisco CRS-1 Series Carrier Routing System Getting Started Guide
GL-18