USB 1.0: The first, designed to work with keyboards, mice and devices that require a very small bandwidth. It allows to work at an approximate speed of 1.5 Megabits per second. With this you would need approximately 6 hours to copy a 4 Gigabyte movie. It appears in the year 1996. USB 1.1. How could it be otherwise and thanks to its success does not take long to design another standard that exceeds the previous one. In this case, its speed is multiplied by eight up to 12 Megabits per second. Now you can copy that same movie in «just» 45 minutes. We are already in 1998.

USB 2.0: With this we have a huge jump. Multiply the speed by 40 times to reach 480 Megabits per second. The same movie from the previous example would take a little more than 1 minute to copy. We are already in the year 2000. It is very common to find PCs that incorporate both ports, USB 1.x and 2.0 then it is very important to know what you are connecting your devices especially if you are going to make copies of very large files. USB 3.0 It appears in 2008. It multiplies the speed up to 4.8 Gigabits, that is, it is 10 times faster than USB 2.0. The same movie would take only 10 or 15 seconds to copy. Now the problem, for the first time, is not the cable but the hard drive or device you connect is fast enough to give you that speed.

USB 3.0: Appears in 2008. It multiplies the speed up to 4.8 Gigabits, that is, it is 10 times faster than USB 2.0. The same movie would take only 10 or 15 seconds to copy. Now the problem, for the first time, is not the cable but the hard drive or device you connect is fast enough to give you that speed.

TYPE A AND B: The classic specification of the USB contemplates several sizes and types of compatible connectors with different specifications:

  • the «standard» of larger size, for example, in USB memory devices.
  • the «mini» size (especially for the end of the B connector, as in many digital cameras)
  • the «micro» size, in its variants USB 1.1 / 2.0 and USB 3.0 (for example, in most smartphones)
  • the «versatile USB On-The-Go» scheme, in mini and micro sizes.

TYPE C: This type of connector, in addition to offering comfort for its reversible design, offers a speed of up to 10 Gbit / s of performance while at the same time up to 2A can be extracted on 5V, and optionally, also 5A on 12V (60W ) or 20V (100W). This is the reason why the new MacBook can be powered simply through its USB connection also based on the new USB 3.1 specification.

PS / 2: The PS / 2 port takes its name from the series of IBM Personal System / 2 computers that was created by IBM in 1987, and used to connect keyboards and mice. Many of the advances presented were immediately adopted by the PC market, this connector being one of the first.

Rj45 Ethernet: The acronym RJ-45 means («Registred Jack 45») or Connector 45 registered, also called Ethernet port. In both the port when it is not in the computer, that is, it is on the wall it is called wall rosette, also Jack UTP or Jack RJ45. It is a semi-rectangular connector with 8 terminals, which are used to interconnect computers and create local area data networks (LAN – network of nearby computers interconnected with each other). They are called ports because they allow the transmission of data between a network (peripheral), with computers.

Serial: It is a digital data communications interface, frequently used by computers and peripherals, where information is transmitted bit by bit sending a single bit at a time, in contrast to the parallel port that sends several bits simultaneously. The comparison between serial and parallel transmission can be explained using an analogy with roads. A traditional road with only one lane in each direction would be like a series transmission and a highway with several lanes in each direction would be the parallel transmission, the vehicles being the bits that circulate through the cable.

External Sata: It is a port that allows the transmission of data between an external device, with the computer, they have the technology «hot swapping» that is, it allows the connection of devices without needing to restart or shut down the computer. The transmission speed is 3.0GB / s, it has 7 terminals, usually come integrated in the motherboard or PCI expansion cards.