1 00:00:01,250 --> 00:00:08,510 In the last lecture, I told you that I'll be defining the terms that I used so far, which are workstations, 2 00:00:08,780 --> 00:00:11,810 servers and hosts. 3 00:00:13,410 --> 00:00:20,640 So in this lecture, we will see the common network components to the four star workstations. 4 00:00:21,650 --> 00:00:29,320 Workstations are often seriously powerful computers that run more than on one central processing unit, 5 00:00:29,330 --> 00:00:36,200 that is CPU and whose resources are available to other users on the network to the access when they 6 00:00:36,200 --> 00:00:36,530 need. 7 00:00:37,580 --> 00:00:44,510 With this much power, you might think that I am distri being a server, not quite, because there's 8 00:00:44,510 --> 00:00:49,970 an important difference between these devices that I'll be covering in the next section. 9 00:00:50,940 --> 00:00:57,740 Workstations are often employed as systems that end users use on a daily basis. 10 00:00:59,140 --> 00:01:07,600 Not do not confuse workstations with clients because people often use the terms, workstation and client 11 00:01:07,600 --> 00:01:14,230 interchangeably in colloquial terms, this isn't a big deal, right? 12 00:01:14,260 --> 00:01:18,580 We all do it, but technically speaking, they are different. 13 00:01:19,120 --> 00:01:27,490 A client, the machine is any device on the network that only asks for access to resources like a printer 14 00:01:27,910 --> 00:01:31,870 or other hosts from a server or powerful workstation. 15 00:01:33,370 --> 00:01:40,310 Now the terms workstation client and hosts can sometimes be used interchangeably. 16 00:01:40,330 --> 00:01:42,050 You have to keep this in mind. 17 00:01:42,700 --> 00:01:49,750 Computers have become more and more powerful and the Tome's have become somewhat fuzzy because hosts 18 00:01:49,750 --> 00:01:53,530 can be clients, workstations, servers and more. 19 00:01:54,520 --> 00:02:01,000 But the term host is used to describe pretty much anything that takes an IP address. 20 00:02:03,250 --> 00:02:13,120 Next up is servers, servers are also powerful computers, they get their name because they truly are 21 00:02:13,480 --> 00:02:21,190 at the service of the network and run specialized software is known as the network operating system 22 00:02:21,190 --> 00:02:24,070 to maintain and control the network. 23 00:02:25,170 --> 00:02:31,950 In a good design that optimizes the network's performance, servers are highly specialized and are there 24 00:02:31,950 --> 00:02:35,720 to handle one important labor intensive job. 25 00:02:36,940 --> 00:02:44,320 This is not to say that a single server can't do many jobs, but more often than not, you'll get a 26 00:02:44,320 --> 00:02:48,490 better performance if you dedicate a server to single tasks. 27 00:02:50,920 --> 00:02:58,420 As we all know, a client asks for resources and server provides those resources to the client. 28 00:03:00,270 --> 00:03:06,270 Now we'll have a look at a different types of common soldiers that you may come across. 29 00:03:07,020 --> 00:03:11,370 First is the file server, which stores and dispenses files. 30 00:03:12,240 --> 00:03:13,940 Next is email server. 31 00:03:14,220 --> 00:03:18,410 The networks post office, which handles all the e mailing functions. 32 00:03:19,200 --> 00:03:23,820 Then is the server which manages printers on network. 33 00:03:24,970 --> 00:03:35,020 Web server manages Web based activities by running hypertext transfer protocol that is HTP for storing 34 00:03:35,020 --> 00:03:37,390 Web content and accessing Web pages. 35 00:03:37,840 --> 00:03:41,850 Do not worry, I am going to cover all the protocols in upcoming sections. 36 00:03:43,150 --> 00:03:50,950 Then comes application server, which manages network applications, and lastly, proxy server, which 37 00:03:50,950 --> 00:03:56,530 handles tasks in the place of other machines on the network, particularly an Internet connection. 38 00:03:58,090 --> 00:04:04,430 As I said, servers are usually dedicated to doing one specific important thing within the network. 39 00:04:04,780 --> 00:04:06,110 It is not always true. 40 00:04:07,390 --> 00:04:14,050 Sometimes they have more than one job, but where the servers are designated for more job or single 41 00:04:14,050 --> 00:04:20,380 job, it is the job of network administrator to decide depending upon the requirements of the organization 42 00:04:20,650 --> 00:04:21,700 or the clients. 43 00:04:22,680 --> 00:04:29,910 And no matter what, they will also have a number of blind machines, irrespective of whether a server 44 00:04:29,910 --> 00:04:33,060 is dedicated for a single job or multiple job. 45 00:04:33,660 --> 00:04:35,610 And lastly, hosts. 46 00:04:36,590 --> 00:04:43,220 Now, this can be kind of confusing because when people refer to hosts, they really can be referring 47 00:04:43,220 --> 00:04:46,090 to almost any type of networking devices. 48 00:04:46,130 --> 00:04:52,670 If you ask your friend what is the host, he may say a host is, which has a computer device which has 49 00:04:52,670 --> 00:04:54,110 servers and blah, blah, blah. 50 00:04:54,530 --> 00:04:55,820 So it is quite confusing. 51 00:04:56,660 --> 00:05:03,820 But if you dig a bit deeper, you'll find that usually this term comes up when people are talking about 52 00:05:03,840 --> 00:05:11,900 resources and jobs that have to do with the transmission control protocol or the Internet protocol. 53 00:05:11,900 --> 00:05:14,320 That is the TCP IP protocol. 54 00:05:14,960 --> 00:05:21,650 We will be having a brief section on TCP IP protocol in one of the sections. 55 00:05:21,650 --> 00:05:30,730 And because now the host means any network devices that has an IP address. 56 00:05:31,220 --> 00:05:36,110 Yes, you will hear the I.T. professionals throw this term around pretty loosely. 57 00:05:36,620 --> 00:05:44,510 But for many certification exams stick to the definition of being a network device which has an IP address. 58 00:05:45,410 --> 00:05:54,350 Now, here's a bit of background regarding was the name host, uh, comes back from the Jurassic period 59 00:05:54,350 --> 00:06:01,850 of networking when those dinosaurs, known as mainframes, were the only intelligent devices able to 60 00:06:01,850 --> 00:06:02,910 roam the network. 61 00:06:03,620 --> 00:06:05,390 These were called hosts. 62 00:06:05,870 --> 00:06:13,310 Whether they had TCP IP functionality or not, it is not known in that beyond a bygone age. 63 00:06:13,640 --> 00:06:20,360 Everything else in the network scape was referred to as dumb terminals because only the mainframes that 64 00:06:20,360 --> 00:06:22,730 is hosts were given the IP address. 65 00:06:23,640 --> 00:06:29,500 And from then, hopes are defined as devices which have an IP address. 66 00:06:30,730 --> 00:06:38,100 So in this lecture, we saw three different terms network components, the first being the workstations, 67 00:06:38,730 --> 00:06:47,400 then servers and finally hosts in the next lecture will see something about then that is a wide area 68 00:06:47,400 --> 00:06:48,000 network.