Subtitles of the Movie

Let's continue our discussion about external connections with this video which is part 2. And you'll notice on the screen now, we're going to talk about FireWire. Now, I've got a couple of pictures on here. This is the ah, connection that you will see. This is the ah, female connection, and then of course, ah here are the two male-type connections that you will see for FireWire. Now if you'll notice they have a unique shape from the other things that you've seen, and there are actually two types of FireWire. Now this was introduced by Apple a few years back, and this got a lot of attention because at that time USB was slow and FireWire was a lot faster. Now in, in the time since that, USB 2.0, and high speed USB and so forth, has overtaken FireWire and FireWire is kind of ah, losing its, its market, if you will, in some instances. It's still used in some ah applications, but ah for the most part USB seems to be ah taking its, its market. But anyway, there are two types, there are six-wire and four-wire, and now some of this information I'm giving you it's so hard to know where to put it in, in this course. There are so many little pieces of information and uh, you may or may not need on the exam. So I'm just going to throw this in there because it tends to show up. There are two speeds for FireWire. There's ah 1394A that runs at 400 megabits per second, then there's 1394B that runs at 800 megabits per second. So ah, FireWire is pretty straightforward. Ah, you could most likely see that on the exam. Now, the next are our DB connections, and we kind of know these as serial connections, and if you'll notice the, the pictures here, this is a, ah, a 9-pin, and then there's a, ah, 25-pin female and 25-pin male and of course there's 15-pin, there's all kinds of these serial-type connections. Notice they have a slight D shape and if you were to turn this thing up on it's side, you would say it's got a D shape. There are male and female and they're generally used to connect printers and other serial devices. Now serial devices have, for the most part, gone by the wayside. As a matter of fact in the Dot Net Framework, Microsoft's newest programming language, they didn't even expose classes for serial devices in the first two releases of that; they do now, but ah, anyway, kind of useless information, I'm sorry. This is being replaced more and more, almost entirely now, by USB. If you'll think about it, it's, it's kind of ah strange to see a, ah printer unless it's an old one on an old PC connected by one of these devices anymore. The ah USB has really taken the place of this, but you will still see these out there in the world working. And you will still see devices, especially in some industries there are still serial devices. As a matter of fact, a lot of the cradles, the hand, the hand-held devices, still use these type connections. And so, you'll, you'll see those around. Now, RJ, this is the one that will confuse you. There will be questions on the exam about this, and let me tell you how to get around these. There are two sizes of RJ. There's RJ11, and that's telephone line, and that's this one right here. And just remember that's the small one. You've grown up seeing these things. Ah, the RJ11 telephone line, this is the modular jack, ah, telephone thing, and you'll notice it's got the little ah clip, and this is the bottom side, and you know if you flip this over you see that little tab that you can bend and it clips in. And then there's RJ45 which is a network cable and it's just the big one. Just remember the big one is the larger number 45 is bigger than 11, and you've got it, and then here's another RJ45 down here, this is a network cable that we're used to seeing. So, RJ45, and again, this is one of those weird things; these are usually referred to as jacks, ah not cords, so I don't know why. Commonly used to connect network cables, phone lines, modems, that sort of thing, and ah, this is still true, and these are still widely used and so you will ah see these on the exam, no doubt. Just make sure you can distinguish between an RJ11 and RJ45 and you should be okay. Now the last one of the audio connections, and notice the picture here that I have, these are pretty straightforward, this is called a mini-audio jack. Now the regular sized audio jack was like a quarter inch and you normally see it like on guitar plugs, old head phone connections, and so forth, and ah now we're using the mini-audio jack most of the time, and you'll hear this referred to as a one-eighth inch jack or a 3.5 millimeter jack, but ah these go in the little holes on the front or back of the PCs on the sound cards, so just plug those in, and again, these are starting to be overtaken by USB now as well in some instances. So anyway, that's an audio jack. So, again, make sure that you're familiar with all these visually, that you can recognize them visually, and also, just be aware of what these are used for ah, generally, and you'll be able to get by the questions on the exam, ah, no sweat on this stuff.