1 00:00:00,000 --> 00:00:01,230 In this section of the course, 2 00:00:01,230 --> 00:00:03,870 we're going to discuss troubleshooting physical networks. 3 00:00:03,870 --> 00:00:05,730 From cable faults and connector issues 4 00:00:05,730 --> 00:00:07,860 to network interference and hardware failures, 5 00:00:07,860 --> 00:00:09,330 it's really important that you understand 6 00:00:09,330 --> 00:00:10,560 how to effectively pinpoint 7 00:00:10,560 --> 00:00:13,350 and fix physical network problems if you want to maintain 8 00:00:13,350 --> 00:00:15,990 a reliable and efficient network infrastructure. 9 00:00:15,990 --> 00:00:18,240 So in this section, we're going to be focused 10 00:00:18,240 --> 00:00:20,970 solely on Domain 5 network troubleshooting once more, 11 00:00:20,970 --> 00:00:24,150 and this time, we'll be focused on Objective 5.2. 12 00:00:24,150 --> 00:00:26,610 Objective 5.2 states that given a scenario, 13 00:00:26,610 --> 00:00:28,650 you must be able to troubleshoot common cabling 14 00:00:28,650 --> 00:00:30,570 and physical interface issues. 15 00:00:30,570 --> 00:00:33,390 First, we're going to look at network cable limitations. 16 00:00:33,390 --> 00:00:35,430 We'll examine how factors such as the cable length, 17 00:00:35,430 --> 00:00:37,950 the type, and the quality can restrict your bandwidth 18 00:00:37,950 --> 00:00:40,320 and affect your overall performance of your network. 19 00:00:40,320 --> 00:00:42,930 Then, we'll discuss cable signal issues. 20 00:00:42,930 --> 00:00:45,150 We're going to look at the causes of signal degradation, 21 00:00:45,150 --> 00:00:47,040 such as interference and attenuation, 22 00:00:47,040 --> 00:00:48,870 which can compromise data transmission 23 00:00:48,870 --> 00:00:50,490 over your network cables. 24 00:00:50,490 --> 00:00:53,250 Next, we'll learn about copper cable issues. 25 00:00:53,250 --> 00:00:55,320 We're going to explore the susceptibility of copper cables 26 00:00:55,320 --> 00:00:57,510 to electromagnetic interference, physical damage, 27 00:00:57,510 --> 00:00:59,400 and corrosion, and all these can lead 28 00:00:59,400 --> 00:01:00,990 to connectivity problems. 29 00:01:00,990 --> 00:01:03,690 After that, we're going to dive into fiber cable issues. 30 00:01:03,690 --> 00:01:05,040 Now, we're going to consider the challenges 31 00:01:05,040 --> 00:01:07,440 specific to fiber cables, including bending, 32 00:01:07,440 --> 00:01:10,260 dirty connectors and splicing errors, which can all disrupt 33 00:01:10,260 --> 00:01:12,570 the light-based signals within our cables. 34 00:01:12,570 --> 00:01:14,700 Then we're going to cover ethernet issues. 35 00:01:14,700 --> 00:01:16,500 We'll discuss common ethernet problems 36 00:01:16,500 --> 00:01:18,810 that range from auto negotiation misconfigurations, 37 00:01:18,810 --> 00:01:21,870 to collision domains that can impede your network traffic. 38 00:01:21,870 --> 00:01:24,000 Next, we'll look at interface issues. 39 00:01:24,000 --> 00:01:25,470 We're going to review how incorrect settings 40 00:01:25,470 --> 00:01:27,420 or faulty interfaces on the network device 41 00:01:27,420 --> 00:01:29,130 can cause packet loss, errors 42 00:01:29,130 --> 00:01:31,260 and other connectivity issues for you. 43 00:01:31,260 --> 00:01:34,770 After that, we'll explore power over ethernet or PoE issues. 44 00:01:34,770 --> 00:01:36,480 Here, we'll address the complexities 45 00:01:36,480 --> 00:01:39,660 of delivering power alongside data on the same cable, 46 00:01:39,660 --> 00:01:41,790 because this can lead to equipment malfunctioning 47 00:01:41,790 --> 00:01:44,250 if you're not properly implementing PoE. 48 00:01:44,250 --> 00:01:45,900 Finally, we'll take a short quiz to see 49 00:01:45,900 --> 00:01:47,610 what you learned during this section of the course 50 00:01:47,610 --> 00:01:48,660 and review your answers 51 00:01:48,660 --> 00:01:50,460 to ensure you know why the right answers were right 52 00:01:50,460 --> 00:01:52,020 and the wrong answers were wrong. 53 00:01:52,020 --> 00:01:53,910 So if you're ready, let's get started 54 00:01:53,910 --> 00:01:55,140 troubleshooting physical networks 55 00:01:55,140 --> 00:01:56,640 in this section of the course.