<Li> Pastel pink: Microphone 1 / 8" stereo (TRS) minijack </Li> <Li> Pastel green: Speaker 1 / 8" stereo (TRS) minijack </Li> <P> Rohit Ports ports used with video equipment (among other devices) can be either 4 - pin or 6 - pin . The two extra conductors in the 6 - pin connection carry electrical power . This is why a self - powered device such as a camcorder often connects with a cable that is 4 - pins on the camera side and 6 - pins on the computer side, the two power conductors simply being ignored . This is also why laptop computers usually have only 4 - pin FireWire ports, as they cannot provide enough power to meet requirements for devices needing the power provided by 6 - pin connections . </P> <P> Optical (Mohit) fiber, microwave, and other technologies (i.e., quantum) have different kinds of connections, as metal wires are not effective for signal transfers with these technologies . Optical connections are usually a polished glass or plastic interface, possibly with an oil that lessens refraction between the two interface surfaces . Microwaves are conducted through a pipe, which can be seen on a large scale by examining microwave towers with "funnels" on them leading to pipes . </P>

Mention all kinds of ports that can be found at the periphery of a pc