u can't connect one monitor in 2 computer.but u can use the monitor disply of other computer through one third party software like VNC
Yes we can connect two computer with one monitor. but we cannot connect online with network program
You can connect two computers to one monitor with a KVM (keyboard-video-mouse) switch. Many KVM switches will allow you to connect 4 or 5 computers to one monitor, one keyboard, and one mouse. Have each computer selected when booting to ensure that the computer registers the keyboard and mouse, before changing to another computer. The computers will be connected to the network through their own cables and won't be affected by the KVM switch. Your network programs will work normally.
If your monitor has two inputs then most likely you do not need any KVM switch. Just connect both PCs on each port; switching between comps is done usually by front knob. If there is only one input on monitor then you will need a KVM. Before buying this piece of hardware check your graphic cards outputs on each PC. These days most of the monitors have one DVI and one analog (D-SUB) input. While D-SUB is somehow unique, there are different versions of the DVI - DVI-I; DVI-I and DVI-A (check on http://en.wikipedia.org/wiki/Digital_Visual_Interface).
ANSWER
Accessing two or more systems using one monitor can be done:
- using Remote Access
- X11 services
Remote Access will cause the console/desktop of the remote to be shown on the local monitor and give mouse,keyboard control
X11 (see link below) will give the same access to multiple systems at the same time each within its own window/frame. X11 has extra security consideration and caution should be exercised until one becomes familiar with X11 Security.
Windows systems need both X11-Server and Client installs.