1
00:00:01,220 --> 00:00:07,790
In the last lecture, we had a look at peer to peer network architecture, and we also discussed the

2
00:00:07,790 --> 00:00:14,390
disadvantages of peer to peer architecture, which we will be overcoming in trying to solve our architecture.

3
00:00:15,110 --> 00:00:19,520
Now, let us have a look at client server architecture.

4
00:00:21,310 --> 00:00:28,860
Glines, our networks are pretty much the polar opposite of peer to peer networks because in them a

5
00:00:28,860 --> 00:00:34,770
single server users network operating system for managing the whole network.

6
00:00:35,640 --> 00:00:36,900
So here's how it works.

7
00:00:38,310 --> 00:00:45,510
Client machines request for a resource, goes to the main server, which responds by handling security

8
00:00:45,510 --> 00:00:48,480
and directing the client to the desired resource.

9
00:00:49,290 --> 00:00:55,200
Now this happens instead of the request going directly to the machine with the desired resource.

10
00:00:55,620 --> 00:00:58,110
And it has some serious advantages.

11
00:00:58,710 --> 00:01:04,590
Now, here, the server asks the central governing authority, and that is why there is ease of accessing

12
00:01:04,590 --> 00:01:05,250
the files.

13
00:01:06,580 --> 00:01:14,110
First, because the network is much better organized and doesn't depend on users remembering where needed

14
00:01:14,110 --> 00:01:21,970
resources are, it's a whole lot easier to find the files you need because everything is stored in one

15
00:01:21,970 --> 00:01:24,890
spot on that special server.

16
00:01:25,750 --> 00:01:33,250
And that is why if the server is fully protected, it provides a huge amount of security to the network.

17
00:01:34,590 --> 00:01:41,610
Your security also gets a lot tighter because all usernames and passwords are on that specific server,

18
00:01:41,910 --> 00:01:44,970
which is never, ever used as a workstation.

19
00:01:46,120 --> 00:01:54,340
You even gain scalability, client server networks can have a lot of workstations on them, and surprisingly,

20
00:01:54,490 --> 00:01:59,740
with all those demands, the networks performance is actually optimized.

21
00:02:00,870 --> 00:02:05,100
And therefore, less memory is needed to store the passwords.

22
00:02:05,790 --> 00:02:12,150
So instead of saving the 50 usernames and passwords in all the 50 machines, we can store that only

23
00:02:12,150 --> 00:02:13,010
on the servers.

24
00:02:13,290 --> 00:02:18,960
And that is why most of the I.T. professionals are more concerned about the servers rather than their

25
00:02:18,960 --> 00:02:26,520
hosts, because in today's services, model and business applications rely completely on client server

26
00:02:26,520 --> 00:02:30,960
architecture to give the ease of information access to the customers.

27
00:02:32,070 --> 00:02:38,730
I hope you understand the difference between the peer to peer network architecture and client network

28
00:02:38,730 --> 00:02:39,500
architecture.

29
00:02:40,480 --> 00:02:46,990
I would like to end this lecture by giving you a simple analogy, for example, if you consider you

30
00:02:46,990 --> 00:02:52,750
have a group of four friends and if you want to have access, if you want to see the assignment of your

31
00:02:53,020 --> 00:02:56,890
peer group, you can just ask him and he will give you his assignment.

32
00:02:57,250 --> 00:03:01,170
That is no one who can say no or there is no one to keep a watch on you.

33
00:03:01,630 --> 00:03:08,590
But if you have a group of four friends and teacher is there in the classroom, you can just you just

34
00:03:08,590 --> 00:03:12,850
have to take the permission of the class teacher in order to do anything.

35
00:03:13,630 --> 00:03:19,480
Now, this is the major difference between peer to peer networks and climbs of a network, but a central

36
00:03:19,480 --> 00:03:26,170
governing authority is there to which keeps all the security measures on track.

37
00:03:27,210 --> 00:03:34,530
So if you have any doubts, please feel free to ask the question and answer Butel reply you as fast

38
00:03:34,530 --> 00:03:35,170
as you can.

39
00:03:35,490 --> 00:03:40,200
And again, do not forget to please write a rating on review for a cause.

40
00:03:40,680 --> 00:03:46,080
It really means a lot that you are enjoying this cause I will see you in the next lecture.