Raritan dominion kx III Administrator's Manual page 437

Question
How is bandwidth used in
KVM-over-IP systems?
How does bandwidth affect
KVM-over-IP performance?
Answer
Dominion KX III offers totally new video
processing that provides flexible, high
performance video, efficient use of bandwidth
and anytime/anywhere access via LAN, WAN
or Internet.
The Dominion KX III digitizes, compresses and
encrypts the keyboard, video and mouse
signals from the target server and transmits IP
packets over the IP network to the remote
client to create the remote session to the user.
The KX III provides an at-the-rack experience
based on its industry-leading video processing
algorithms.
Screen changes, i.e., video accounts for the
majority of the bandwidth used – and keyboard
and mouse activity are significantly less.
It is important to note that bandwidth is only
used when the user is active. The amount of
bandwidth used is based on the amount of
change to the server's video display screen.
If there are no changes to the video – the user
is not interacting with the server – there is
generally little to no bandwidth used. If the user
moves the mouse or types a character, then
there is a small amount of bandwidth used. If
the display is running a complex screen saver
or playing a video, then there can be a larger
amount of bandwidth used.
In general, there is a trade-off between
bandwidth and performance. The more
bandwidth available, the better performance
can be. In limited bandwidth environments,
performance can degrade. The Dominion KX III
has been optimized to provide strong
performance in a wide variety of environments.
Appendix F: Frequently Asked Questions
425