Date post: | 14-Apr-2017 |
Category: |
Internet |
Upload: | ahmed-khan |
View: | 330 times |
Download: | 0 times |
VNC
What is VNC? Why do we need to be familiar with VNC? Where do we get VNC? Limitations of VNC? Other notes about VNC?
Virtual Network Computing (VNC) Remote control system of other computer
windowing environments Allows access to “desktops” of like or
different operating systems Developed by AT&T Laboratories Freely Available
UNIXUNIX WindowsWindows
MacMac
server sends small rectangles of the frame buffer to the client.use a lot of bandwidth.raw encoding where pixel data is sent in left-to-right scanline order.original full screen has been transmitted, only transfers rectangles that change.a mouse pointer moving across a desktop .), but bandwidth demands get very high if a lot of pixels change at the same time. viewing full-screen video.VNC by default uses TCP port 5900.
simple protocol for remote access to graphical user interfaces.at the frame buffer level.it is applicable to all systems and applications, including Microsoft Windows, Mac OS X and the X Window System.) as a remote display technology to be used by a simple thin client with ATM connectivity called a Videotile.It has three versions (current 3.8)
VNC has two major software components
vncservervncserver
vncviewervncviewer
AT&T Laboratories, Cambridge UKhttp://www.uk.research.att.com/vnc/
Available for UNIX environment Requires system administrator privileges Already installed on the CIS machines
Available for Windows platform Requires you to download and install on your
machine Available for Mac platform Available for Java-enabled browsers
In 1994, ORL built the Videotile .is a display device with an LCD screen, a pen, and an ATM network connection.designed to display good-quality video.a remote computer screen as a video source and simply shipped the user interface as raw video onto the tileworked surprisingly well.but used a significant amount of bandwidth.
VNC is network resource intensive High Bandwidth connection = Good situation Low Bandwidth connection = Bad situation
Filesystems are still separate between different operating systems Transferring files still requires other
mechanisms (e.g. ftp) Access to non-Unix platforms do not have
good multi-user support PC/MAC lack general concept of several user
access
Prerequisites You should be comfortable with the
client/server concepts of the X-windows environment
If not, review “Introduction to X windows” http://www.strath.ac.uk:80/CC/Courses/oldXC/
xc.html VNC server and viewer installed on both local
and remote machines Configurations you will encounter
1. Local PC/MAC accessing remote UNIX system2. Local UNIX system accessing remote PC/MAC3. Local UNIX system accessing remote UNIX
system
Download site http://www.uk.research.att.com/vnc/
download.html CIS Unix platforms
Already installed by system administrator PC platform
Download and install as you would other PC software
Mac platform Download and install as you would other Mac
software