quick summary:
Citrix's Intelligent Console Architecture (ICA) is a general-purpose
presentation services protocol for Microsoft Windows. Conceptually,
ICA is similar to the UNIX X-Windows protocol. ICA allows an
application's logic to execute on a WinFrame multi-user Windows
application server, located on the LAN. Only the user interface,
keystrokes and mouse movement are transferred between the server and
the client device over any network or communications protocol,
resulting in minimal client resource consumption. ICA is designed to
run over industry-standard network protocols, such as TCP/IP, NetBEUI,
IPX/SPX, and PPP and industry-standard transport protocols, such as
async, ISDN, Frame Relay and ATM.
joe