Appendices
353
UDP (User Datagram Protocol)
UDP is a connectionless protocol that runs on top of IP networks like TCP. Unlike TCP/IP,
UDP/IP provides very few error recovery services, offering instead a direct way to send and
receive datagrams over an IP network. UDP is primarily used for broadcasting messages over
a network.
Video Viewer
The Video Viewer is a software component that provides the user interface needed to display a
remote target device through KVM over IP sessions.
VPN (Virtual Private Network)
VPN is a means of implementing a private network on a public network such as the Internet.
By encrypting data and assigning addresses, the impression is given to networks at each end of
the VPN that they are connected by a private physical network instead of across a
public network.
(WAN) Wide Area Network
WAN typically refers to a network that is distributed at multiple sites and connected by a
relatively slow link between the sites. The WAN is frequently implemented using a VPN on
the Internet.
(WAS) Web Application Server
WAS is software that runs on a server that is capable of executing web applications. The WAS
software typically contains or works with a web (HTTP) server.
(Webapp) Web Application
Webapps are groups of server-side Web resources that make up an interactive online
application. The web resources include Java servlets, JavaServer Pages
™
(JSPs), static
documents (such as HTML documents), and applets that can be deployed in a DSView 3
software client web browser. Web applications must run in the context of a web application
server such as the DSView 3 software server.
Web server
A web server is a computer equipped with server software to respond to HTTP requests, such
as requests from a web browser. A web server uses the HTTP protocol to communicate with
clients on a TCP/IP network.
X.509
X.509 is the most widely used standard for defining digital certificates. X.509 is an
International Telecommunications Union (ITU) recommendation, which means that the
standard has not yet been officially defined or approved. As a result, companies have
implemented the standard in different ways. For example, both Netscape and Microsoft use
X.509 certificates to implement SSL in their web servers and web browsers. However, an
X.509 certificate generated by Netscape may not be readable by Microsoft products, and
vice versa.
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