WEBVTT 1 00:00:00.180 --> 00:00:02.340 So, when you think of a computer network, 2 00:00:02.340 --> 00:00:04.020 what comes to your mind? 3 00:00:04.020 --> 00:00:05.940 Do you think of a router and a switch? 4 00:00:05.940 --> 00:00:07.560 Do you think of your wireless network at home 5 00:00:07.560 --> 00:00:09.420 that you're accessing this video over? 6 00:00:09.420 --> 00:00:11.370 Is it limited to just computers? 7 00:00:11.370 --> 00:00:13.230 Is it limited to just the internet? 8 00:00:13.230 --> 00:00:15.780 Is it limited to just wireless or wired networks, 9 00:00:15.780 --> 00:00:17.820 like ethernet or fiber? 10 00:00:17.820 --> 00:00:19.080 Well, no. 11 00:00:19.080 --> 00:00:21.600 There are a lot of different types of networks out there. 12 00:00:21.600 --> 00:00:23.010 And when it comes down to it, 13 00:00:23.010 --> 00:00:25.410 the purpose of these networks is to make connections 14 00:00:25.410 --> 00:00:27.870 between lots of different types of machines. 15 00:00:27.870 --> 00:00:30.030 For example, if you have an Apple Watch, 16 00:00:30.030 --> 00:00:31.500 or some kind of smart watch, 17 00:00:31.500 --> 00:00:32.430 there's actually a connection 18 00:00:32.430 --> 00:00:35.670 between your watch and your phone happening over Bluetooth. 19 00:00:35.670 --> 00:00:38.160 And guess what? That is actually a network. 20 00:00:38.160 --> 00:00:40.650 It's called a personal area network. 21 00:00:40.650 --> 00:00:43.320 Now there's also the typical wifi network that you're using 22 00:00:43.320 --> 00:00:44.640 when you want to connect your tablet 23 00:00:44.640 --> 00:00:46.380 to your wireless access point at home 24 00:00:46.380 --> 00:00:48.210 and then connect out to the internet. 25 00:00:48.210 --> 00:00:51.240 Or maybe your desktop is connecting to a hub 26 00:00:51.240 --> 00:00:52.590 and then connecting to a switch 27 00:00:52.590 --> 00:00:54.540 and that switch connects to a router 28 00:00:54.540 --> 00:00:56.910 and that router connects you to the internet. 29 00:00:56.910 --> 00:00:59.730 You see, there's all sorts of different networks out there 30 00:00:59.730 --> 00:01:03.210 and these networks have all become converged over time. 31 00:01:03.210 --> 00:01:04.590 You see, in the old days, 32 00:01:04.590 --> 00:01:07.440 we had different networks for different purposes. 33 00:01:07.440 --> 00:01:09.540 When I grew up, we had a telephone network 34 00:01:09.540 --> 00:01:12.870 and all it did was allow you to make analog phone calls. 35 00:01:12.870 --> 00:01:14.790 And then we had computer networks 36 00:01:14.790 --> 00:01:16.950 and they would transmit data back and forth 37 00:01:16.950 --> 00:01:18.333 and these were both separate things 38 00:01:18.333 --> 00:01:21.720 that would occur on separate networks and separate cabling. 39 00:01:21.720 --> 00:01:23.250 We had phones for analog 40 00:01:23.250 --> 00:01:25.560 and we had data networks for digital things, 41 00:01:25.560 --> 00:01:29.040 but over time all of this merged and converged 42 00:01:29.040 --> 00:01:31.830 and now we have voice, video and data 43 00:01:31.830 --> 00:01:34.200 all traveling over the same network. 44 00:01:34.200 --> 00:01:36.330 These days, when you pick up your cell phone 45 00:01:36.330 --> 00:01:38.970 it really doesn't care whether you're making a voice call, 46 00:01:38.970 --> 00:01:40.560 whether you're sending a text message, 47 00:01:40.560 --> 00:01:42.360 or whether you're going to be surfing the internet 48 00:01:42.360 --> 00:01:43.860 using that connection, 49 00:01:43.860 --> 00:01:46.410 it all happens over your data connection. 50 00:01:46.410 --> 00:01:49.260 To the phone and the carrier, it's all treated the same. 51 00:01:49.260 --> 00:01:52.770 It's just ones and zeros going out over a digital network 52 00:01:52.770 --> 00:01:54.660 over this cellular connection. 53 00:01:54.660 --> 00:01:56.280 Now because of this convergence, 54 00:01:56.280 --> 00:01:57.930 and our reliance on networks, 55 00:01:57.930 --> 00:02:00.780 we expect a really high availability and uptime 56 00:02:00.780 --> 00:02:02.370 for all of our networks. 57 00:02:02.370 --> 00:02:03.210 As someone who used to be 58 00:02:03.210 --> 00:02:05.640 an IT director for a large organization, 59 00:02:05.640 --> 00:02:07.920 I can tell you that our customers seem to expect 60 00:02:07.920 --> 00:02:10.650 100% uptime, but guess what? 61 00:02:10.650 --> 00:02:12.240 That is not realistic 62 00:02:12.240 --> 00:02:15.300 because that means we would never have any downtime. 63 00:02:15.300 --> 00:02:17.700 And so instead, our promise to our customers 64 00:02:17.700 --> 00:02:19.970 in our business networks usually is something like 65 00:02:19.970 --> 00:02:23.670 99.999% uptime. 66 00:02:23.670 --> 00:02:26.910 This is what we call the five nines of availability. 67 00:02:26.910 --> 00:02:30.720 Now notice this isn't 100%, but it's pretty darn close 68 00:02:30.720 --> 00:02:33.090 and we consider this highly reliable. 69 00:02:33.090 --> 00:02:35.610 Now, what does this equate to in the real world 70 00:02:35.610 --> 00:02:38.250 if I had a five nines type of network? 71 00:02:38.250 --> 00:02:41.610 Well, it means that throughout the course of the entire year 72 00:02:41.610 --> 00:02:42.960 as the IT director, 73 00:02:42.960 --> 00:02:45.930 I'm only allowed to have five minutes of downtime. 74 00:02:45.930 --> 00:02:46.860 That's it. 75 00:02:46.860 --> 00:02:50.400 Five whole minutes each and every year of downtime 76 00:02:50.400 --> 00:02:51.660 and the rest of the year, 77 00:02:51.660 --> 00:02:55.770 365 days, 24 hours a day, seven days a week, 78 00:02:55.770 --> 00:02:57.690 I have to be up and running. 79 00:02:57.690 --> 00:02:59.850 That is a big challenge that we face 80 00:02:59.850 --> 00:03:02.610 as network technicians and network administrators. 81 00:03:02.610 --> 00:03:04.890 And we've got to keep those networks up and running and 82 00:03:04.890 --> 00:03:06.690 keep that data flowing. 83 00:03:06.690 --> 00:03:08.100 Now in this part of the course, 84 00:03:08.100 --> 00:03:10.800 that is exactly what I'm going to teach you how to do 85 00:03:10.800 --> 00:03:13.470 by ensuring you understand the fundamentals of networks 86 00:03:13.470 --> 00:03:16.050 and how to troubleshoot things when they break. 87 00:03:16.050 --> 00:03:18.510 Now, once we have those networks up and running, 88 00:03:18.510 --> 00:03:21.570 you may be wondering what kind of things can we do with it? 89 00:03:21.570 --> 00:03:23.730 In other words, what kind of network traffic 90 00:03:23.730 --> 00:03:25.920 can we expect to see within our networks? 91 00:03:25.920 --> 00:03:27.660 Well, there's file sharing, 92 00:03:27.660 --> 00:03:30.270 there's video chatting like Skype and FaceTime, 93 00:03:30.270 --> 00:03:31.500 there's surfing the web 94 00:03:31.500 --> 00:03:34.920 like when you go to Google or Facebook or diontraining.com, 95 00:03:34.920 --> 00:03:38.040 there's social media like LinkedIn and Facebook and Twitter, 96 00:03:38.040 --> 00:03:38.940 there's streaming video, 97 00:03:38.940 --> 00:03:42.030 like what you're watching right now, or YouTube or Netflix. 98 00:03:42.030 --> 00:03:45.240 We have emails and instant messaging and voice over IP 99 00:03:45.240 --> 00:03:47.010 and lots of different things. 100 00:03:47.010 --> 00:03:48.270 You see the point here is that 101 00:03:48.270 --> 00:03:50.190 there are lots of different types of traffic 102 00:03:50.190 --> 00:03:52.680 going across our network all the time. 103 00:03:52.680 --> 00:03:54.990 And every day there's new types of network traffic 104 00:03:54.990 --> 00:03:56.160 being designed too. 105 00:03:56.160 --> 00:03:57.210 And guess what? 106 00:03:57.210 --> 00:03:59.820 As a technician, you're going to be expected to support 107 00:03:59.820 --> 00:04:00.960 all of them. 108 00:04:00.960 --> 00:04:03.060 Supporting all of this different network traffic 109 00:04:03.060 --> 00:04:05.520 is a huge struggle and a big challenge, 110 00:04:05.520 --> 00:04:07.050 especially if you want to maintain those 111 00:04:07.050 --> 00:04:11.820 five nines of availability of 99.999% uptime, 112 00:04:11.820 --> 00:04:13.697 but we're going to work through all of that and 113 00:04:13.697 --> 00:04:16.530 all of the different challenges and how to overcome them 114 00:04:16.530 --> 00:04:18.480 as we go throughout the next few sections 115 00:04:18.480 --> 00:04:19.890 of the course together. 116 00:04:19.890 --> 00:04:23.280 So what are we going to cover in this section of the course? 117 00:04:23.280 --> 00:04:25.980 Well, we are going to be focused on domain two and 118 00:04:25.980 --> 00:04:28.080 just a little bit of domain three. 119 00:04:28.080 --> 00:04:29.910 Now domain two is networking 120 00:04:29.910 --> 00:04:32.280 and domain three is hardware. 121 00:04:32.280 --> 00:04:35.070 In domain two, we're going to cover parts of objectives 122 00:04:35.070 --> 00:04:39.420 2.2, 2.4, 2.7 and 2.8. 123 00:04:39.420 --> 00:04:43.350 From domain three, we're going to cover parts of objective 3.1. 124 00:04:43.350 --> 00:04:46.650 Now objective 2.2 states that you must compare and contrast 125 00:04:46.650 --> 00:04:48.450 common networking hardware. 126 00:04:48.450 --> 00:04:51.720 Objective 2.4 states that you must summarize services 127 00:04:51.720 --> 00:04:53.670 provided by network hosts. 128 00:04:53.670 --> 00:04:56.760 Objective 2.7 states that you must compare and contrast 129 00:04:56.760 --> 00:05:00.360 internet connection types, network types and their features. 130 00:05:00.360 --> 00:05:03.180 Objective 2.8 states that given a scenario, 131 00:05:03.180 --> 00:05:05.280 you must use networking tools. 132 00:05:05.280 --> 00:05:07.080 And objective 3.1 states 133 00:05:07.080 --> 00:05:09.210 that you must explain basic cable types, 134 00:05:09.210 --> 00:05:12.180 their connectors, features, and purposes. 135 00:05:12.180 --> 00:05:14.010 First, we're going to be taking a look at 136 00:05:14.010 --> 00:05:15.450 the different pieces of equipment 137 00:05:15.450 --> 00:05:16.800 that we use in our networks 138 00:05:16.800 --> 00:05:19.620 as we dive into our networking hardware lesson. 139 00:05:19.620 --> 00:05:21.990 Then, we're going to talk about the different types of networks 140 00:05:21.990 --> 00:05:24.030 that you may encounter in the field. 141 00:05:24.030 --> 00:05:27.810 Next, we're going to discuss the internet of things, or IOT, 142 00:05:27.810 --> 00:05:30.360 which includes a lot of different types of network clients 143 00:05:30.360 --> 00:05:33.360 that connect to our small office and home office networks 144 00:05:33.360 --> 00:05:35.880 to perform unique features and functions. 145 00:05:35.880 --> 00:05:39.150 After that, we're going to move into a few lessons on cabling 146 00:05:39.150 --> 00:05:41.400 where we're going to focus on twisted pair cables, 147 00:05:41.400 --> 00:05:44.160 fiber optic cables, and coaxial cables. 148 00:05:44.160 --> 00:05:45.990 Then we'll move into our coverage of 149 00:05:45.990 --> 00:05:47.310 the different networking tools 150 00:05:47.310 --> 00:05:49.590 that you're going to use as a technician. 151 00:05:49.590 --> 00:05:51.750 After that, we're going to move into a series of 152 00:05:51.750 --> 00:05:53.610 demonstration videos where I'm going to show you 153 00:05:53.610 --> 00:05:56.430 how to build a cable, wire up a computer network, 154 00:05:56.430 --> 00:05:58.680 and conduct some basic troubleshooting and testing 155 00:05:58.680 --> 00:06:01.170 of your network using different networking tools 156 00:06:01.170 --> 00:06:03.810 that we discussed throughout our networking tools lesson. 157 00:06:03.810 --> 00:06:05.550 So let's dive into this section 158 00:06:05.550 --> 00:06:07.593 on networking basics and get started.