01-12-2012, 12:44 PM
NETWORK PORT
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ABSTRACT
An Ethernet port is an opening on computer network equipment that Ethernet cables plug into. These ports are alternatively called jacks or sockets. Ethernet ports accept cables with RJ-45 connectors.Most computers include one built-in Ethernet port for connecting the device to a wired network. A computer's Ethernet port is connected to its internal Ethernet network adapter.
Many newer computers have a network adapter built in that you can use to connect to a wired network. If you want to install a wired network adapter and aren’t sure whether your computer already has one, look for a network port on the back of the computer. Network ports resemble phone jacks, but they are slightly larger and have eight pins inside.
PS/2 Port
You may have heard this term before, but what really is a PS/2 port? I know this type of port is required for some of the items WorldStart sells, so you may have seen it on our Web site. So, if you’ve never needed a PS/2 port before, your time may come, so here is a little description of one for you.
A PS/2 port is also commonly known as the mouse port. It is a special port that is used to connect a mouse or a keyboard to a computer. This type of port usually works with a mini DIN plug that contains six little pins and it is usually round. You may know these ports by their color, as the mouse port is usually green and the keyboard port is usually purple.
VGA Port
A Video Graphics Array (VGA) connector is a three-row 15-pin DE-15 connector. The 15-pin VGA connector is found on many video cards, computer monitors, and some high definition television sets. On laptop computers or other small devices, a mini-VGA port is sometimes used in place of the full-sized VGA connector.
DE-15 is also conventionally called RGB connector, D-sub 15, mini sub D15, mini D15, DB-15, HDB-15, HD-15 or HD15 (High Density, to distinguish it from the older and less flexible DE-9 connector used on some older VGA cards, which has the same shell size but only two rows of pins).
VGA connectors and cables carry analog component RGBHV (red, green, blue, horizontal sync, vertical sync) video signals, and VESADisplay Data Channel (VESA DDC) data. In the original version of DE-15 pinout, one pin was keyed by plugging the female connector hole; this prevented non-VGA 15 pin cables from being plugged into a VGA socket. Four pins carried Monitor ID bits which were rarely used; VESA DDC redefined some of these pins and replaced the key pin with +5 V DC power supply.
The VGA interface is not engineered to be hotpluggable (so that the user can connect or disconnect the output device while the host is running), although in practice this can be done and usually does not cause damage to the hardware or other problems. However, nothing in the design ensures that the ground pins make a connection first and break last, so hotplugging may introduce surges in signal lines which may or may not be adequately protected against. Also, depending on the hardware and software, detecting a monitor being connected might not work properly in all cases.