The newest in computer display connector technology, DisplayPort is currently offered on only select monitors and computers.

Display Port is the fastest digital technology and has one of the smallest connectors as well (Figure 1). DisplayPort supports automatic adapting to each of the below technologies. If the computer has a DisplayPort Connector, it should have also come with these adapters. 

 
Figure 1: DisplayPort Connector and Cable End Comparison - From left to right: DVI, VGA, DisplayPort

Note the angled edge on only one side of the DisplayPort adapter.

High-Definition Multimedia Interface (HDMI) is the current digital standard for connecting all kinds of video devices.

HDMI can be used for computer display, but it is better suited to other devices. HDMI can be adapted to a DVI connection on the monitor if necessary, but most computers that have a HDMI connector also have at least one DVI connector.


Figure 2: HDMI Connector and Cable End (Magnified) 

Note the angled edge at two corners.

Digital Video Interface (DVI) is the digital standard for computer generated text and graphics.

DVI connections are usually color-coded with white plastic and labels (Figure 3a) .


Figure 3a: 24-Pin DVI Connector

There are several formats for DVI (Figure 3b). DVI-I and DVI-A can be adapted to VGA. DVI-D however cannot. 

Dual Link DVI supports higher resolution monitors and is required on some very large displays for optimum picture quality.  

DVI cables can support one or more of the types at once. Be sure to check your cables carefully to ensure you're using the correct ones.


Figure 3b: List of DVI Connector Types

The 15-Pin Video Graphics Array (VGA) is the analog standard for connecting monitors to computers. It is still very common for monitors to have this connector but newer connections like DVI and HDMI are recommended if available.

VGA connections are commonly color-coded with blue plastic and labels.  9-pin VGA cables exist and are compatible with the 15-pin connector. Be careful and check the number of pins if the cable you are using or the connector is not blue. Serial cables (6-pin) can be very similar looking but will not plug into a VGA connector.

Figure 4: 15-Pin VGA Connector