1 00:00:00,000 --> 00:00:01,200 In this section of the course, 2 00:00:01,200 --> 00:00:03,390 we're going to discuss network services. 3 00:00:03,390 --> 00:00:04,950 Now, a network service is a function 4 00:00:04,950 --> 00:00:06,960 that's provided by the network infrastructure 5 00:00:06,960 --> 00:00:08,700 to support various types of communications 6 00:00:08,700 --> 00:00:11,250 and processes like assigning IP addresses, 7 00:00:11,250 --> 00:00:13,320 translating domain names to IP addresses, 8 00:00:13,320 --> 00:00:14,790 synchronizing our network's time, 9 00:00:14,790 --> 00:00:16,710 and managing our quality of service. 10 00:00:16,710 --> 00:00:19,590 So we're going to focus on Domain 1, networking concepts, 11 00:00:19,590 --> 00:00:21,390 and Domain 3, network operations 12 00:00:21,390 --> 00:00:22,920 in this part of the course. 13 00:00:22,920 --> 00:00:25,800 We're going to focus briefly on Objective 1.2, which states 14 00:00:25,800 --> 00:00:27,840 that you must be able to compare and contrast networking 15 00:00:27,840 --> 00:00:30,240 appliances, applications, and functions. 16 00:00:30,240 --> 00:00:32,700 We'll also cover Objective 3.4, which states 17 00:00:32,700 --> 00:00:34,140 that given a scenario, you must be able 18 00:00:34,140 --> 00:00:35,850 to implement IP Version 4 19 00:00:35,850 --> 00:00:38,460 and IP Version 6 network services. 20 00:00:38,460 --> 00:00:40,920 Now first we're going to be looking at DHCP 21 00:00:40,920 --> 00:00:43,920 or the Dynamic Host Configuration Protocol Service. 22 00:00:43,920 --> 00:00:46,710 DHCP is used to automatically assign IP addresses 23 00:00:46,710 --> 00:00:49,650 and other network configuration information to a client. 24 00:00:49,650 --> 00:00:51,510 Now, we'll also do a hands-on demonstration, 25 00:00:51,510 --> 00:00:54,300 so you can see how DHCP works out in the real world. 26 00:00:54,300 --> 00:00:55,440 Then we're going to discuss 27 00:00:55,440 --> 00:00:57,720 the Stateless Address Autoconfiguration protocol 28 00:00:57,720 --> 00:00:59,100 known as SLAAC. 29 00:00:59,100 --> 00:01:01,860 Now SLAAC is used in IPv6 to allow a client 30 00:01:01,860 --> 00:01:04,379 to configure itself with a public IPV six address 31 00:01:04,379 --> 00:01:06,750 without the need for a DHCP server. 32 00:01:06,750 --> 00:01:08,790 Next, you'll learn all about DNS 33 00:01:08,790 --> 00:01:11,430 or the Domain Name System, including how it works, 34 00:01:11,430 --> 00:01:13,050 the different types of DNS records contained 35 00:01:13,050 --> 00:01:15,300 within the system, methods for securing DNS, 36 00:01:15,300 --> 00:01:18,720 and a demonstration of how DNS works out in the real world. 37 00:01:18,720 --> 00:01:21,120 After that, we'll cover the Network Time Protocol, 38 00:01:21,120 --> 00:01:23,640 also known as NTP, since it's critically important 39 00:01:23,640 --> 00:01:24,960 to maintain a well synchronized 40 00:01:24,960 --> 00:01:27,960 and accurate time for all of our network connected devices. 41 00:01:27,960 --> 00:01:29,580 Then we're going to discuss the concepts 42 00:01:29,580 --> 00:01:30,930 surrounding quality of service, 43 00:01:30,930 --> 00:01:32,070 including the different methods used 44 00:01:32,070 --> 00:01:33,300 to categorize our traffic 45 00:01:33,300 --> 00:01:35,430 and the different mechanisms used to provide higher levels 46 00:01:35,430 --> 00:01:37,260 of service based on the different types of traffic 47 00:01:37,260 --> 00:01:39,240 being transmitted over our networks. 48 00:01:39,240 --> 00:01:41,400 Finally, we'll take a short quiz to see what you learned 49 00:01:41,400 --> 00:01:43,530 during this section of the course and review your answers 50 00:01:43,530 --> 00:01:45,330 to ensure you know why the right answers were right 51 00:01:45,330 --> 00:01:46,830 and the wrong answers were wrong. 52 00:01:46,830 --> 00:01:49,320 So if you're ready, let's get started with our coverage 53 00:01:49,320 --> 00:01:51,820 of network services in this section of the course.