1 1 00:00:00,400 --> 00:00:02,810 What is the Internet of Things? 2 2 00:00:02,810 --> 00:00:05,060 Well, it's pretty much everything. 3 3 00:00:05,060 --> 00:00:07,420 If your refrigerator has a wireless connection in it, 4 4 00:00:07,420 --> 00:00:09,420 it's part of the Internet of Things. 5 5 00:00:09,420 --> 00:00:11,510 In my house, we have a Nest Thermostat, 6 6 00:00:11,510 --> 00:00:13,330 which is part of the Internet of Things. 7 7 00:00:13,330 --> 00:00:15,210 I have smart TVs that access the internet 8 8 00:00:15,210 --> 00:00:17,200 and let me watch YouTube and Netflix. 9 9 00:00:17,200 --> 00:00:19,580 And this is part of the Internet of Things too. 10 10 00:00:19,580 --> 00:00:20,660 The other things that we have 11 11 00:00:20,660 --> 00:00:22,060 are things like traditional servers 12 12 00:00:22,060 --> 00:00:25,980 and laptops and desktops, your smartphone, your car, 13 13 00:00:25,980 --> 00:00:27,900 all of these things, wherever they are, 14 14 00:00:27,900 --> 00:00:29,920 they all seem to be online nowadays. 15 15 00:00:29,920 --> 00:00:32,570 And this is where the Internet of Things comes in. 16 16 00:00:32,570 --> 00:00:33,510 And you have to understand 17 17 00:00:33,510 --> 00:00:35,670 some of the technologies used by these IoT 18 18 00:00:35,670 --> 00:00:37,290 or Internet of Things devices 19 19 00:00:37,290 --> 00:00:39,640 in order to pass your Network+ exam. 20 20 00:00:39,640 --> 00:00:42,870 So what are some specific Internet of Things technologies? 21 21 00:00:42,870 --> 00:00:45,550 Well, the first one is 802.11. 22 22 00:00:45,550 --> 00:00:47,340 Do you remember what that stood for? 23 23 00:00:47,340 --> 00:00:48,173 That's right. 24 24 00:00:48,173 --> 00:00:50,407 It's Wifi. It's wireless networking. 25 25 00:00:50,407 --> 00:00:54,900 802.11, a b g, n, or ac. 26 26 00:00:54,900 --> 00:00:56,850 And we'll talk about all those letters later on 27 27 00:00:56,850 --> 00:00:58,980 are all wireless or Wifi. 28 28 00:00:58,980 --> 00:01:01,430 And you can operate those as either infrastructure mode 29 29 00:01:01,430 --> 00:01:02,720 or ad-hoc mode. 30 30 00:01:02,720 --> 00:01:04,200 And if you have an Internet of Things device 31 31 00:01:04,200 --> 00:01:07,430 like a wireless speaker or refrigerator or a thermostat, 32 32 00:01:07,430 --> 00:01:09,730 they can use that Wifi to make connections 33 33 00:01:09,730 --> 00:01:11,800 back to the outside world. 34 34 00:01:11,800 --> 00:01:13,560 The second technology we're going to talk about 35 35 00:01:13,560 --> 00:01:14,510 is Bluetooth. 36 36 00:01:14,510 --> 00:01:15,820 And Bluetooth as you could see 37 37 00:01:15,820 --> 00:01:18,640 in the upper right hand corner on this blue key chain fob 38 38 00:01:18,640 --> 00:01:20,740 can be used for all sorts of different things. 39 39 00:01:20,740 --> 00:01:22,450 Now, why would you want your keys 40 40 00:01:22,450 --> 00:01:24,340 to have a Bluetooth receiver in them? 41 41 00:01:24,340 --> 00:01:26,060 Well, maybe you lose them a lot. 42 42 00:01:26,060 --> 00:01:27,720 And this way you can use your cell phone 43 43 00:01:27,720 --> 00:01:29,650 to figure out where they are based on Bluetooth 44 44 00:01:29,650 --> 00:01:32,410 and their location, because they're low power devices. 45 45 00:01:32,410 --> 00:01:34,210 They're small, they're portable, 46 46 00:01:34,210 --> 00:01:37,370 and they use low energy as part of this Bluetooth variant. 47 47 00:01:37,370 --> 00:01:39,920 This allows you to be part of this mesh network as well. 48 48 00:01:39,920 --> 00:01:42,700 So your keys can talk to your cell phone via Bluetooth, 49 49 00:01:42,700 --> 00:01:44,890 and then your cell phone can connect over cellular 50 50 00:01:44,890 --> 00:01:47,410 to tell you where those keys are. 51 51 00:01:47,410 --> 00:01:49,540 The next one we have is RFID. 52 52 00:01:49,540 --> 00:01:53,100 And RFID stands for Radio-frequency ID. 53 53 00:01:53,100 --> 00:01:55,580 Now, if you've ever gone to a hotel room and you got a key, 54 54 00:01:55,580 --> 00:01:57,130 like I show here on the screen, 55 55 00:01:57,130 --> 00:01:59,240 this key has a chip embedded in it. 56 56 00:01:59,240 --> 00:02:01,930 And it uses an electromagnetic field that when you put it 57 57 00:02:01,930 --> 00:02:02,900 next to the door lock, 58 58 00:02:02,900 --> 00:02:06,120 it reads the tag in the key and let you in the room. 59 59 00:02:06,120 --> 00:02:07,790 The next one we have is what's known 60 60 00:02:07,790 --> 00:02:11,060 as Near-field Communication or NFC. 61 61 00:02:11,060 --> 00:02:13,370 NFC is going to enable two electronic devices 62 62 00:02:13,370 --> 00:02:15,270 to communicate within about four centimeters 63 63 00:02:15,270 --> 00:02:16,250 of each other. 64 64 00:02:16,250 --> 00:02:18,630 So Samsung was actually one of the first to really use 65 65 00:02:18,630 --> 00:02:21,030 Near-field Communications for Samsung pay 66 66 00:02:21,030 --> 00:02:23,460 and devices like Apple pay and Google pay 67 67 00:02:23,460 --> 00:02:25,040 use that same type of technology. 68 68 00:02:25,040 --> 00:02:26,870 When you put your phone on the reader, 69 69 00:02:26,870 --> 00:02:28,970 it can read it through Near-field Communication 70 70 00:02:28,970 --> 00:02:30,870 and take payment from you. 71 71 00:02:30,870 --> 00:02:33,030 The next technology we have is IR, 72 72 00:02:33,030 --> 00:02:34,810 which stands for Infrared. 73 73 00:02:34,810 --> 00:02:36,970 So if you take your remote for your TV at home, 74 74 00:02:36,970 --> 00:02:40,040 this probably uses infrared because it has a line of sight 75 75 00:02:40,040 --> 00:02:41,750 using an infrared frequency, 76 76 00:02:41,750 --> 00:02:44,300 and it uses these light beams to tell the TV, 77 77 00:02:44,300 --> 00:02:45,790 which channel you want. 78 78 00:02:45,790 --> 00:02:46,940 This is how it's going to work. 79 79 00:02:46,940 --> 00:02:48,430 And Internet of Things technologies 80 80 00:02:48,430 --> 00:02:50,050 can use infrared as well 81 81 00:02:50,050 --> 00:02:51,970 although it is a much older technology 82 82 00:02:51,970 --> 00:02:54,050 and not use very heavily by them, 83 83 00:02:54,050 --> 00:02:55,650 it is something that is available. 84 84 00:02:55,650 --> 00:02:58,340 And so I wanted to make sure you knew about it for the exam. 85 85 00:02:58,340 --> 00:03:00,510 Now, the next two technologies we're going to talk about 86 86 00:03:00,510 --> 00:03:02,170 are very common nowadays. 87 87 00:03:02,170 --> 00:03:03,880 And they're actually newer technologies 88 88 00:03:03,880 --> 00:03:06,810 that are really been made popular by the Internet of Things. 89 89 00:03:06,810 --> 00:03:08,650 The first one is Z-Wave. 90 90 00:03:08,650 --> 00:03:11,100 Z-Wave is going to provide you with a short range, 91 91 00:03:11,100 --> 00:03:13,020 low latency data transfer, 92 92 00:03:13,020 --> 00:03:16,090 and it's going to use lower power and lower data rates 93 93 00:03:16,090 --> 00:03:17,530 than Wifi does. 94 94 00:03:17,530 --> 00:03:19,770 But again, you're trading off lower speed 95 95 00:03:19,770 --> 00:03:22,200 because you're getting lower power consumption. 96 96 00:03:22,200 --> 00:03:24,860 Wifi can really burn up your battery pretty quickly. 97 97 00:03:24,860 --> 00:03:26,720 And so for Internet of Things devices, 98 98 00:03:26,720 --> 00:03:28,960 we try to say battery whenever possible. 99 99 00:03:28,960 --> 00:03:31,170 Mostly you're going to find things like Z-Wave 100 100 00:03:31,170 --> 00:03:32,690 used for home automation. 101 101 00:03:32,690 --> 00:03:33,900 So for the exam, 102 102 00:03:33,900 --> 00:03:36,350 if you see a question that's talking about Z-Wave, 103 103 00:03:36,350 --> 00:03:38,220 I want you to think about home automation, 104 104 00:03:38,220 --> 00:03:40,050 things like turning your lights on and off, 105 105 00:03:40,050 --> 00:03:42,350 turning sounds on and off, that kind of thing. 106 106 00:03:42,350 --> 00:03:44,650 All of that uses Z-Wave. 107 107 00:03:44,650 --> 00:03:48,490 The other technology we have is known as ANT plus, ANT+. 108 108 00:03:49,360 --> 00:03:50,650 This is going to be a collection 109 109 00:03:50,650 --> 00:03:52,780 of transfer of sensory data. 110 110 00:03:52,780 --> 00:03:54,590 So if you're going to have a tire pressure system 111 111 00:03:54,590 --> 00:03:57,160 in your car, it may be using ANT+. 112 112 00:03:57,160 --> 00:03:59,270 It can also be used with remote control systems, 113 113 00:03:59,270 --> 00:04:02,400 things like tire pressures, TVs, lights, et cetera. 114 114 00:04:02,400 --> 00:04:05,540 So you can know what things are on and what things are off. 115 115 00:04:05,540 --> 00:04:07,020 Anything with a sensor in it, 116 116 00:04:07,020 --> 00:04:09,630 is usually going to be something that's using ANT+. 117 117 00:04:09,630 --> 00:04:11,430 So some of this home automation stuff 118 118 00:04:11,430 --> 00:04:14,960 that we're talking about can be used either Z-Wave or ANT+ 119 119 00:04:14,960 --> 00:04:16,250 and it really could be either one. 120 120 00:04:16,250 --> 00:04:17,590 But if you're thinking more of sensors 121 121 00:04:17,590 --> 00:04:20,400 and collecting the temperature or how bright something is, 122 122 00:04:20,400 --> 00:04:22,080 that's usually more of an ANT+ thing. 123 123 00:04:22,080 --> 00:04:23,480 And Z-Wave, they're going to refer to things 124 124 00:04:23,480 --> 00:04:24,390 like home automation, 125 125 00:04:24,390 --> 00:04:26,470 just to keep things simple on the exam. 126 126 00:04:26,470 --> 00:04:28,210 And that's the idea of these Internet of Things 127 127 00:04:28,210 --> 00:04:29,200 technologies. 128 128 00:04:29,200 --> 00:04:30,770 So when you look at the Internet of Things, 129 129 00:04:30,770 --> 00:04:32,150 if you look at all of these devices 130 130 00:04:32,150 --> 00:04:33,970 and how they're connecting to our networks, 131 131 00:04:33,970 --> 00:04:35,710 and from a security standpoint, 132 132 00:04:35,710 --> 00:04:37,720 that's going to be a little frightening, right? 133 133 00:04:37,720 --> 00:04:40,190 And so when we talk about the security section later on, 134 134 00:04:40,190 --> 00:04:42,530 I want you to think about these Internet of Things. 135 135 00:04:42,530 --> 00:04:45,090 One of the ongoing jokes in the IT community 136 136 00:04:45,090 --> 00:04:47,630 is that security is what the S stands for 137 137 00:04:47,630 --> 00:04:49,270 in Internet of Things. 138 138 00:04:49,270 --> 00:04:51,410 Well, there's no S in IoT, right? 139 139 00:04:51,410 --> 00:04:54,080 There's no security in IoT, that's the joke. 140 140 00:04:54,080 --> 00:04:55,770 But from a technology standpoint, 141 141 00:04:55,770 --> 00:04:57,430 these things are pretty cool, right? 142 142 00:04:57,430 --> 00:04:59,570 We can do all sorts of cool stuff with them. 143 143 00:04:59,570 --> 00:05:01,770 I can pull out my cell phone from anywhere in the world 144 144 00:05:01,770 --> 00:05:05,950 and turn on the lights in my house or my security system, 145 145 00:05:05,950 --> 00:05:08,210 or I can turn up or turn down the temperature 146 146 00:05:08,210 --> 00:05:09,920 using all that automation. 147 147 00:05:09,920 --> 00:05:11,660 These are really cool technologies, 148 148 00:05:11,660 --> 00:05:14,360 but you have to also think about the security of them 149 149 00:05:14,360 --> 00:05:15,690 as you're thinking about how they're connecting 150 150 00:05:15,690 --> 00:05:16,523 to your network 151 151 00:05:16,523 --> 00:05:18,260 and how you want to keep the rest of your systems 152 152 00:05:18,260 --> 00:05:19,333 safe and secure.