WEBVTT 1 00:00:00.450 --> 00:00:01.950 In this section of the course, 2 00:00:01.950 --> 00:00:03.690 we're going to cover the BIOS, 3 00:00:03.690 --> 00:00:06.540 also known as the basic input output system, 4 00:00:06.540 --> 00:00:08.130 and the UEFI, also known 5 00:00:08.130 --> 00:00:11.340 as the unified extensible firmware interface. 6 00:00:11.340 --> 00:00:12.840 Now, in your computer system 7 00:00:12.840 --> 00:00:17.040 you're either going to have the BIOS or the UEFI, but not both. 8 00:00:17.040 --> 00:00:19.290 The BIOS is the older version of these two 9 00:00:19.290 --> 00:00:22.950 and it only supports 32-bit processors and motherboards. 10 00:00:22.950 --> 00:00:25.650 The BIOS is a program that a CPU is going to use 11 00:00:25.650 --> 00:00:28.770 to start the computer system when it's first powered on. 12 00:00:28.770 --> 00:00:32.550 The operating system, like Windows, Linux, or OSX 13 00:00:32.550 --> 00:00:35.100 are built as software and they're stored on your hard drive 14 00:00:35.100 --> 00:00:36.690 or solid state device, 15 00:00:36.690 --> 00:00:39.360 but your computer doesn't even know how to read 16 00:00:39.360 --> 00:00:40.680 or write to that device, 17 00:00:40.680 --> 00:00:42.960 so it relies on the BIOS to understand 18 00:00:42.960 --> 00:00:44.820 how to read input from the keyboard, 19 00:00:44.820 --> 00:00:46.560 display information to the screen 20 00:00:46.560 --> 00:00:48.690 and read or write to different storage devices, 21 00:00:48.690 --> 00:00:50.220 like your hard disc. 22 00:00:50.220 --> 00:00:52.440 The BIOS also serves as a method of configuring 23 00:00:52.440 --> 00:00:54.090 the motherboard and its features 24 00:00:54.090 --> 00:00:57.090 using a menu-driven text-based interface. 25 00:00:57.090 --> 00:00:59.640 Now, this BIOS is actually stored as firmware 26 00:00:59.640 --> 00:01:01.680 on the motherboard of your system. 27 00:01:01.680 --> 00:01:03.750 Firmware is software on a chip 28 00:01:03.750 --> 00:01:06.420 and it contains a specialized BIOS program code 29 00:01:06.420 --> 00:01:08.790 in flash memory on your motherboard. 30 00:01:08.790 --> 00:01:10.950 This firmware software is specialized 31 00:01:10.950 --> 00:01:13.110 to the exact motherboard that you're using, 32 00:01:13.110 --> 00:01:15.450 and it's created as a very low level code 33 00:01:15.450 --> 00:01:17.430 in order to interact with the various components 34 00:01:17.430 --> 00:01:18.960 on that motherboard. 35 00:01:18.960 --> 00:01:22.200 An operating system like Windows, Linux or OSX 36 00:01:22.200 --> 00:01:25.050 on the other hand is created as a generic software 37 00:01:25.050 --> 00:01:28.230 that runs on any motherboard and therefore it can't serve 38 00:01:28.230 --> 00:01:30.630 the same functions as the BIOS. 39 00:01:30.630 --> 00:01:33.660 Now over time, a newer version of the BIOS was created, 40 00:01:33.660 --> 00:01:37.080 and this is called UEFI, U-E-F-I, 41 00:01:37.080 --> 00:01:40.500 or the user extensible firmware interface. 42 00:01:40.500 --> 00:01:44.850 Now the UEFI can support 64-bit processors, unlike the BIOS, 43 00:01:44.850 --> 00:01:47.460 as well as providing you with a graphical user interface, 44 00:01:47.460 --> 00:01:50.130 the ability to use a mouse, as well as your keyboard, 45 00:01:50.130 --> 00:01:52.890 network functionality and better security. 46 00:01:52.890 --> 00:01:55.470 The UEFI is still stored as part of the firmware, 47 00:01:55.470 --> 00:01:58.890 just like the BIOS was sitting there on the motherboard. 48 00:01:58.890 --> 00:02:00.570 Now, as we go through this section 49 00:02:00.570 --> 00:02:03.930 we're going to cover the remaining parts of objective 3.4 50 00:02:03.930 --> 00:02:06.930 which states, given a scenario you must be able to install 51 00:02:06.930 --> 00:02:10.680 and configure motherboards, central processing units or CPUs 52 00:02:10.680 --> 00:02:13.470 and add on cards, specifically the portion 53 00:02:13.470 --> 00:02:17.520 for the BIOS and the UEFI under objective 3.4. 54 00:02:17.520 --> 00:02:19.140 Now, as we begin this section, 55 00:02:19.140 --> 00:02:21.480 we're going to first take a look at how a computer boots up 56 00:02:21.480 --> 00:02:22.980 when it's first powered on, 57 00:02:22.980 --> 00:02:24.570 as well as its different boot options 58 00:02:24.570 --> 00:02:27.780 that you can configure inside the BIOS and the UEFI. 59 00:02:27.780 --> 00:02:29.580 Next, we'll discuss the different types 60 00:02:29.580 --> 00:02:31.380 of BIOS and UEFI security 61 00:02:31.380 --> 00:02:32.490 that you're going to be able to configure 62 00:02:32.490 --> 00:02:34.380 on a given computer system. 63 00:02:34.380 --> 00:02:36.000 Then we'll move into a discussion 64 00:02:36.000 --> 00:02:39.000 of the trusted platform module known as the TPM 65 00:02:39.000 --> 00:02:42.150 and the hardware security module, known as the HSM, 66 00:02:42.150 --> 00:02:45.810 as well as their roles in securing your system and its data. 67 00:02:45.810 --> 00:02:47.610 After that, we'll move into the different 68 00:02:47.610 --> 00:02:50.850 configuration options inside of the BIOS and UEFI 69 00:02:50.850 --> 00:02:52.830 that involve your system's cooling features, 70 00:02:52.830 --> 00:02:55.530 such as the fans that are used in active cooling. 71 00:02:55.530 --> 00:02:58.320 Finally, we'll move into two short demonstrations 72 00:02:58.320 --> 00:03:00.180 where you're going to learn how to configure the BIOS 73 00:03:00.180 --> 00:03:01.710 on a 32-bit system 74 00:03:01.710 --> 00:03:04.890 and how to configure the UEFI on a 64-bit system. 75 00:03:04.890 --> 00:03:06.990 So let's get started with our coverage 76 00:03:06.990 --> 00:03:10.263 of the BIOS and the UEFI in this section of the course.