Avocent SPC420 Telnet session, Telnet Viewer, Tiered switch, UDP User Datagram Protocol, Unit

Appendices 399

TCP is one of the main protocols in TCP/IP networks. The IP protocol deals only with packets. TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent.

Telnet session

A Telnet Viewer session is a type of target device session in which the target device supports Telnet and the DSView 3 software client connects directly to the target device using Telnet.

Telnet Viewer

This applet is a software component that provides the user interface needed to display a remote target device through serial over IP sessions.

Tiered switch

A tiered switch is also known as a cascade switch. See the definition of cascade switch.

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.

Unit

Unit is a generic term that refers to either a target device, managed appliance, blade chassis or a component in a virtual environment. For example, the Unit List may contain both target devices and managed appliances.

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