1
00:00:00,210 --> 00:00:02,190
Hello and welcome to this lecture.

2
00:00:02,610 --> 00:00:07,950
In this lecture, we are going to talk about some basics of networking, basically learning.

3
00:00:07,950 --> 00:00:14,580
Networking is very important because we all are connected with Internet or we can see in other terms

4
00:00:14,580 --> 00:00:15,270
networking.

5
00:00:16,360 --> 00:00:23,650
Swack Network is a group of two or more devices that are connected to each other to sell the data or

6
00:00:23,650 --> 00:00:30,130
share the resources, so a network contains a number of different computer systems that is connected

7
00:00:30,130 --> 00:00:33,880
by a physical or wireless connection like server or router.

8
00:00:35,190 --> 00:00:42,270
So here, the router has direct access to the Internet, as you can see here, we are having.

9
00:00:43,330 --> 00:00:46,880
OK, we're having these many clients, these are the users.

10
00:00:47,710 --> 00:00:50,890
This is the router, and here we are having Internet.

11
00:00:51,810 --> 00:00:56,720
So as you can see, that ROPA is in direct connection with the Internet.

12
00:00:57,830 --> 00:01:05,060
OK, so that is why it is saying that the Routon has direct access to the Internet so their devices

13
00:01:05,060 --> 00:01:09,180
can only connect to the Internet, to the router, or we can see access point.

14
00:01:09,740 --> 00:01:16,310
Suppose, for example, the client or device connected to the network to Wi-Fi or Ethernet.

15
00:01:17,330 --> 00:01:23,270
So if the client opens up the browser and typed Google dot com, then your computer will send a request

16
00:01:23,270 --> 00:01:24,770
to the router.

17
00:01:26,900 --> 00:01:34,730
OK, asking for Google dot com, then the router will go to the Internet and request Google dot com

18
00:01:34,730 --> 00:01:35,000
here.

19
00:01:35,960 --> 00:01:39,500
So will receive the Google dot com from Internet.

20
00:01:40,600 --> 00:01:43,000
And then forward that particular request.

21
00:01:44,670 --> 00:01:50,100
That particular request of you can see response to the computer, so now Glenn can see Google dot com

22
00:01:50,100 --> 00:01:51,570
on the browser as a result.

23
00:01:51,900 --> 00:01:55,580
OK, so this is all basically Internet works in a very basic manner.

24
00:01:56,400 --> 00:02:04,450
So networking devices on the same computer or we can see network communicate with each other using packets.

25
00:02:05,250 --> 00:02:13,260
So if you send a video log in a website, sending jet messages, sending e-mails, all the data is sent

26
00:02:13,260 --> 00:02:14,010
as packet.

27
00:02:14,760 --> 00:02:21,930
So networking devices ensured that these packets go in the right direction using the market just so

28
00:02:21,930 --> 00:02:25,050
each packet has the same Mac address and destination entries.

29
00:02:25,440 --> 00:02:32,190
And it flew from Source Mac address to the nation market as it is, because suppose you're having this

30
00:02:32,190 --> 00:02:32,700
packet.

31
00:02:33,650 --> 00:02:36,890
You are chatting with a friend, you are having two packets.

32
00:02:37,990 --> 00:02:45,010
This is you and this is your friend, you are talking to each other now, you send the message to your

33
00:02:45,010 --> 00:02:45,390
friend.

34
00:02:45,730 --> 00:02:49,810
So how are your computer will know that this message should be sent to this person.

35
00:02:50,790 --> 00:02:59,490
By simply giving the source, address, source, mark address and destination Mac address to this particular

36
00:02:59,640 --> 00:03:05,610
packet, what it will do, it will contain the source market, which is your Mac address, and it will

37
00:03:05,610 --> 00:03:09,960
contain Beom, which is destination Magruder's, which is your friend Mac.

38
00:03:10,230 --> 00:03:17,060
So this that this particular packet to the French device of you can see French address.

39
00:03:17,360 --> 00:03:20,790
So this is how basically networking works in computer.

40
00:03:20,790 --> 00:03:27,600
And it is very important to understand if you're talking about hacking when it comes to network penetration

41
00:03:27,600 --> 00:03:29,730
testing or network hacking, it is must.

42
00:03:30,030 --> 00:03:34,320
And if you're talking about ethical hacking, like website hacking, computer hacking, system hacking,

43
00:03:34,320 --> 00:03:37,490
so hacking and also networking.

44
00:03:37,490 --> 00:03:43,350
And then it is also very important to understand networking because we all are connected to Internet

45
00:03:43,350 --> 00:03:46,380
and Internet is nothing but the networking all we can say network.

46
00:03:46,740 --> 00:03:48,060
So this is how it works.

47
00:03:48,090 --> 00:03:49,710
And thank you for watching this lecture.