1 00:00:00,480 --> 00:00:01,589 In this section of the course, 2 00:00:01,589 --> 00:00:03,750 we're going to discuss ethernet switching. 3 00:00:03,750 --> 00:00:06,210 Now as we move into our coverage of ethernet switching, 4 00:00:06,210 --> 00:00:09,150 we're going to be focused heavily on layer two of the OSI model 5 00:00:09,150 --> 00:00:10,920 because layer two is where switching occurs 6 00:00:10,920 --> 00:00:13,890 within a local area network when you're using ethernet. 7 00:00:13,890 --> 00:00:16,470 So as we start beginning our coverage of ethernet switching, 8 00:00:16,470 --> 00:00:19,170 we'll be focused on domain one, networking concepts, 9 00:00:19,170 --> 00:00:21,090 domain two, network implementation, 10 00:00:21,090 --> 00:00:23,190 and domain four network security. 11 00:00:23,190 --> 00:00:25,470 We'll be briefly covering objective 1.2, 12 00:00:25,470 --> 00:00:26,880 which states that you must be able to compare 13 00:00:26,880 --> 00:00:28,710 and contrast networking appliances, 14 00:00:28,710 --> 00:00:30,570 applications, and functions. 15 00:00:30,570 --> 00:00:32,310 We'll also spend quite a bit of time in this section 16 00:00:32,310 --> 00:00:34,050 exploring objective 2.2, 17 00:00:34,050 --> 00:00:35,580 which states that given a scenario 18 00:00:35,580 --> 00:00:36,690 you must be able to configure 19 00:00:36,690 --> 00:00:38,910 switching technologies and features. 20 00:00:38,910 --> 00:00:41,370 We'll also be briefly covering objective 4.3, 21 00:00:41,370 --> 00:00:43,260 which states, given a scenario you must be able 22 00:00:43,260 --> 00:00:45,030 to apply network security features, 23 00:00:45,030 --> 00:00:46,890 defense techniques, and solutions. 24 00:00:46,890 --> 00:00:48,660 We'll be specifically focusing on the use 25 00:00:48,660 --> 00:00:49,980 of network access control 26 00:00:49,980 --> 00:00:52,020 or NAC as our devices attempt to connect 27 00:00:52,020 --> 00:00:53,640 to our ethernet networks. 28 00:00:53,640 --> 00:00:56,220 Now first we're going to be looking at ethernet fundamentals, 29 00:00:56,220 --> 00:00:58,260 including how ethernet gained its popularity 30 00:00:58,260 --> 00:01:00,900 and how it works to move our data across our networks. 31 00:01:00,900 --> 00:01:02,880 Then we'll be discussing network devices, 32 00:01:02,880 --> 00:01:04,170 including things like switches 33 00:01:04,170 --> 00:01:06,780 and how they evolve from layer one devices like hubs 34 00:01:06,780 --> 00:01:08,820 by going into layer two devices like bridges, 35 00:01:08,820 --> 00:01:10,320 and combining both of those things together 36 00:01:10,320 --> 00:01:12,090 to get us layer two switching. 37 00:01:12,090 --> 00:01:12,960 We'll also take a look at 38 00:01:12,960 --> 00:01:14,340 the different kinds of network devices 39 00:01:14,340 --> 00:01:15,450 that you may see out in the real world 40 00:01:15,450 --> 00:01:17,640 as well as we do a demonstration. 41 00:01:17,640 --> 00:01:19,140 Next, I'm going to teach you all about 42 00:01:19,140 --> 00:01:21,330 virtual local area networks, known as VLANs, 43 00:01:21,330 --> 00:01:22,163 and these are going to be used 44 00:01:22,163 --> 00:01:23,940 to further subdivide our broadcast domains 45 00:01:23,940 --> 00:01:26,280 into smaller and more manageable areas. 46 00:01:26,280 --> 00:01:27,420 After that, we'll explore 47 00:01:27,420 --> 00:01:28,710 the different configuration options 48 00:01:28,710 --> 00:01:30,810 associated with virtual local area networks, 49 00:01:30,810 --> 00:01:33,300 and then we'll be discussing the spanning tree protocol 50 00:01:33,300 --> 00:01:36,030 known as STP, which is used to prevent switching loops 51 00:01:36,030 --> 00:01:38,130 inside of our ethernet networks. 52 00:01:38,130 --> 00:01:40,170 Next, we'll explore network access control 53 00:01:40,170 --> 00:01:42,270 or NAC, which is used to provide some security 54 00:01:42,270 --> 00:01:44,460 to our ethernet based layer two networks. 55 00:01:44,460 --> 00:01:47,040 After that, we'll discuss the concept of an MTU 56 00:01:47,040 --> 00:01:49,020 or a maximum transmission unit. 57 00:01:49,020 --> 00:01:50,880 This includes the default size of a frame 58 00:01:50,880 --> 00:01:52,260 and the maximum size of a frame 59 00:01:52,260 --> 00:01:55,200 that can be transmitted overlay using ethernet. 60 00:01:55,200 --> 00:01:57,420 Finally, we'll take a short quiz to see what you learned 61 00:01:57,420 --> 00:01:59,460 during this section of the course and review your answers 62 00:01:59,460 --> 00:02:01,230 to ensure you know why the right answers were right 63 00:02:01,230 --> 00:02:02,640 and the wrong answers are wrong. 64 00:02:02,640 --> 00:02:05,280 So if you're ready, let's get started with our coverage 65 00:02:05,280 --> 00:02:07,880 of ethernet switching in this section of the course.