19-11-2012, 04:24 PM
Cons, Benefits and Selection criteria for Virtual Network Computing Technology
Cons, Benefits and Selection.pdf (Size: 81.9 KB / Downloads: 28)
Abstract-
In this paper Virtual Network Computing (VNC)
technology is defined and basic models of desktop sharing are
introduced. The needs for using of virtual network computing
systems are described and the uses of VNC systems are explained
with example. The cons and benefits of VNC systems are
discussed. Some of remote desktop sharing applications are also
introduced and compared in this paper. Finally, the necessary
criteria for selecting the appropriate desktop sharing software is
prescribed that can be helpful for choosing a certain software for
certain conditions.
INTRODUCTION
In computing, VNC is a graphical desktop sharing system
that uses the RFB protocol to remotely control another
computer. VNC enables the desktop display of one computer
to be remotely viewed and controlled over a network
connection [1]. VNC was created as an open source research
project in the late 1990s. Since that time, several mainstream
remote desktop solutions have been created based on VNC.
The original development team produces the RealVNC
package [2-4].
To use VNC, you need a network TCP/IP connection, a
vncserver and a vncviewer to connect to the machine running
the vncserver [1, 2]. There are two basic models for desktop
sharing, one is Remote log-in and the other one is Real-time
collaboration. Remote log-in allows users to connect to their
own desktop while being physically away from their
computer. Real-time collaboration desktop sharing, when used
in conjunction with other components of multimedia
communications such as audio and video, creates the notion of
virtual space where people can meet, socialize and work
together.
Remote Log-in
This model of desktop sharing allows users to connect to
their own desktop while being physically away from their
computer. Systems that support the X Window System,
typically Unix-based ones, have this ability "built in".
Windows versions starting from Windows 2000 have a built-in
solution for remote access as well in the form of Remote
Desktop Protocol and prior to that in the form of Microsoft’s
NetMeeting. The open source product VNC provides crossplatform
solution for remote log-in. The shortcomings of the
above solutions are their inability to work outside of a single
NAT environment. A number of commercial products
overcome this restriction by tunneling the traffic through
rendezvous servers.
Real-Time Collaboration
Real time collaboration is much a bigger area of desktop
sharing use, and it has gained recent momentum as an
important component of rich multimedia communications.
Real time collaboration desktop sharing, when used in
conjunction with other components of multimedia
communications such as audio and video, creates the notion
of virtual space where people can meet, socialize and work
together. On the larger scale, this area is also referred as
web conferencing.
USES FOR VIRTUAL NETWORK COMPUTING SYSTEMS
These types of systems have many different uses that can
make things relatively easier for businesses and individuals
alike. For example, a VNC system can help with remote
technical support. This means that if there is a problem on one
computer, a person could connect to that computer’s network
in order to troubleshoot any problems. This is a major use for
businesses [6]. It is also used by people who want to help
friends or relatives with computer issues. People can use
VNC to remotely access files on certain computers in a wide
range of situations. With the growth of multinational
corporations and the requirements for large networks,
companies need an Internet technology professional for each
office location. Desktop sharing software provides a more
efficient way to manage tech support issues. Online computer
support personnel can change desktop settings, update
software, troubleshoot PC issues and access files on the
remote computer via a remote desktop connection. As long as
the computer is powered on and has networking capabilities,
tech support administrators can manage the machine including
rebooting it for software updates. These remote applications
can also be used for servers on the network.
SELECTION CRITERIA FOR DESKTOP SHARING
SOFTWARE
Desktop sharing allows users to share information remotely
through access to another’s desktop. Individuals can now
collaborate with other co-workers who are located globally or
even short distances away. Time and money is saved from
travel expenses. Desktop sharing software communicates the
gestures made by the host computer to the remote computer.
The receiver is able to see an exact replica of the host’s
computer screen in real time with this technology. Most
desktop sharing software can work well with low-bandwidth
connections because the packets of data are compressed and
sent to a remote computer. Compressed information or
encrypted data can be transmitted faster across any
connection.
CONCLUSION
In this paper Virtual Network Computing (VNC) is
defined, basic models are described; the needs and uses for the
VNC systems are explained along with the benefits and cons
of these systems. A comparison is performed between the
notable desktop sharing applications and finally a selection
criterion for the discussed technology and remote desktop
sharing software has given. It is conspicuous that more
research should be done in the field of VNC and desktop
sharing technologies.