1
00:00:02,030 --> 00:00:05,180
OK, so now let's start with VPN.

2
00:00:06,130 --> 00:00:10,940
Now, nobody's virtual private networks aren't really that hard to understand.

3
00:00:11,350 --> 00:00:17,800
I want to explain in really simple words, a VPN that is a virtual private network.

4
00:00:18,070 --> 00:00:24,670
It fits somewhere between the local area network that we are connected to and the wide area network

5
00:00:24,670 --> 00:00:26,710
that connects to our more lands.

6
00:00:27,490 --> 00:00:34,990
And many times may seem just like a vine link because your computer on one LAN connects to a different

7
00:00:34,990 --> 00:00:38,330
remote land and uses its resources remotely.

8
00:00:38,950 --> 00:00:41,080
That is the basic definition of a VPN.

9
00:00:41,860 --> 00:00:47,730
Now the key difference between the virtual private networks is a big one security.

10
00:00:48,220 --> 00:00:55,650
So the definition of a connecting a LAN to a one may sound the same, but VPN is much more secure.

11
00:00:57,110 --> 00:00:58,310
Now, here's the difference.

12
00:00:58,880 --> 00:01:06,320
A typical wide area network connects two or more remote local area networks together using someone else's

13
00:01:06,320 --> 00:01:14,840
network like, say, your Internet service provider and router your local host and router see these

14
00:01:14,840 --> 00:01:19,640
networks as remote networks and not as local networks or resources.

15
00:01:20,620 --> 00:01:24,720
This would be a van in its most general definition, right?

16
00:01:26,310 --> 00:01:35,080
So VPN actually makes your local host part of the remote network by using the van link that connects

17
00:01:35,260 --> 00:01:36,590
to the remote LAN.

18
00:01:37,600 --> 00:01:43,630
Now, the VPN will make your host appear as though it's actually local and remote network.

19
00:01:44,200 --> 00:01:52,120
This means that we now have access to the remote local areas resources and that access is very secure.

20
00:01:53,210 --> 00:02:00,620
This may sound like a lot like a villain definition that is a virtual land, that is take my host and

21
00:02:00,620 --> 00:02:04,070
make it appear local to the remote resources.

22
00:02:05,300 --> 00:02:12,230
Just remember that for networks that are physically local, using virtual land is a good solution.

23
00:02:12,650 --> 00:02:19,730
But for networks that are physically remote, those that span a wide area, network weapons is the best

24
00:02:19,730 --> 00:02:23,500
solution for a simple VPN.

25
00:02:23,630 --> 00:02:27,560
Let's use a home office in a country or a city.

26
00:02:28,130 --> 00:02:33,080
And, you know, on the screen you can show you can you can see this figure.

27
00:02:33,110 --> 00:02:35,330
So what basically is going on?

28
00:02:35,690 --> 00:02:41,290
I am sending data to someone on the Internet through a tunnel.

29
00:02:41,310 --> 00:02:47,360
Now, this is a preventive tunnel through which I'm sending a data and whoever is trying to access is

30
00:02:47,360 --> 00:02:48,800
getting rebundled.

31
00:02:48,800 --> 00:02:56,180
So neither hacker nor the government can see what is sending between the data.

32
00:02:56,180 --> 00:03:00,950
And that is why many people use virtual private networks.

33
00:03:00,950 --> 00:03:07,190
Now, in some cases, the let's say if you're watching a Netflix movie now, if you are from India or

34
00:03:07,190 --> 00:03:14,180
from us, some movies of, let's say, European countries are not allowed to be broadcasted in your

35
00:03:14,180 --> 00:03:14,600
country.

36
00:03:15,050 --> 00:03:22,190
So what most people do is they make use of VPN, which means that I suppose this is Netflix and this

37
00:03:22,190 --> 00:03:27,170
is you you are trying to directly access Netflix, but you are not able to do that.

38
00:03:27,180 --> 00:03:28,530
So I'll use this.

39
00:03:28,530 --> 00:03:31,920
So if I drink trying to use Netflix, you are not able to do that.

40
00:03:32,540 --> 00:03:40,820
So what you do is you access Netflix through this country, this ISP of, let's say us, and then this

41
00:03:40,820 --> 00:03:49,250
ISP sends packet to the Netflix and let us say this, ISPs from a country where the movies are allowed

42
00:03:49,340 --> 00:03:50,070
to broadcast.

43
00:03:50,480 --> 00:03:52,420
So what is this here?

44
00:03:52,460 --> 00:03:58,690
So what does this Netflix things that the packets are received from European country and now I can permit.

45
00:03:59,180 --> 00:04:06,370
So these data, this data is again transmitted to the ISP of the country in which the movie is allowed.

46
00:04:06,380 --> 00:04:09,530
And again, this ISP sends the data back to you.

47
00:04:09,890 --> 00:04:15,950
So in this case, instead of this channel, they can you use a VPN here?

48
00:04:15,950 --> 00:04:23,900
So what, uh, what actually, uh, the user or you use it, you use a VPN here, a virtual private

49
00:04:23,900 --> 00:04:27,590
network through which the data is getting transferred.

50
00:04:28,460 --> 00:04:31,460
So now there are different types of weapons.

51
00:04:31,880 --> 00:04:34,870
Now, why is this so important now?

52
00:04:34,880 --> 00:04:42,680
Because, uh, the types of weapons are named based on the kind of role they play in the real world

53
00:04:42,680 --> 00:04:43,220
business.

54
00:04:43,670 --> 00:04:49,880
So the first one is client to client virtual private network, which is also known as a remote access

55
00:04:49,880 --> 00:04:58,370
virtual private network, not a remote access virtual private network allows remote users like telecommunications

56
00:04:58,370 --> 00:05:04,040
to securely access the corporate network wherever and whenever they need to.

57
00:05:04,790 --> 00:05:09,720
It is typical that users can connect to the Internet, but not to the office.

58
00:05:09,740 --> 00:05:11,330
Why are they VPN client?

59
00:05:11,750 --> 00:05:16,280
Because they don't have the correct VPN address and password.

60
00:05:17,300 --> 00:05:24,170
This is the most common problem and one should always check first before trying to access the resources.

61
00:05:25,460 --> 00:05:33,350
The next one is host to host weepin, a host to host a virtual private network is somewhat like a site

62
00:05:33,350 --> 00:05:40,370
to site in concept, except that the end points of the tunnel are to individual hosts.

63
00:05:40,970 --> 00:05:47,690
In this case, all the traffic is protected from the time it leaves the network interface card of one

64
00:05:47,690 --> 00:05:51,620
host until it reaches the network interface card of the next host.

65
00:05:51,620 --> 00:05:57,350
Which means if you are trying to communicate with your friend and if you are using a VPN that is a kind

66
00:05:57,350 --> 00:06:04,120
of a host to host virtual private network, site to site, virtual private network.

67
00:06:04,550 --> 00:06:13,430
Now site to site weapons are also known as Internet weapons allows a company to connect is remote sites

68
00:06:13,430 --> 00:06:18,720
to the corporate backbone securely over a public media like the Internet.

69
00:06:19,580 --> 00:06:26,600
Now, instead of requiring more expensive area that is a wide area network connections, this is probably

70
00:06:26,600 --> 00:06:30,520
the best solution for connecting remote office to a machine company.

71
00:06:30,530 --> 00:06:36,770
So if someone asks you how do you connect your remote office to the main company headquarters, the

72
00:06:36,770 --> 00:06:40,490
answer is site to site virtual private networks.

73
00:06:41,210 --> 00:06:49,340
And the last kind of VPN is extranet VPN Extranet Vivienne's allows and organization suppliers, its

74
00:06:49,340 --> 00:06:56,420
partners and its customers to be connected to the corporate network in a limited way for only business

75
00:06:56,420 --> 00:06:57,180
purposes.

76
00:06:58,430 --> 00:07:04,360
So these are the types of weapons that you need to remember from the exact point of view or any example

77
00:07:04,370 --> 00:07:08,420
where you're going to appear on an interview you're going to appear for.

78
00:07:08,450 --> 00:07:11,720
Just make sure that you remember the definition of VPN.

79
00:07:12,250 --> 00:07:13,790
Why do we require Ripkin?

80
00:07:13,880 --> 00:07:16,670
The answer is for security purposes.

81
00:07:17,570 --> 00:07:22,730
And just remember the four types of weapons that we have just discussed.

82
00:07:23,270 --> 00:07:24,830
That is it for this lecture.