Hello and welcome to this lecture.
In this lecture, we are going to talk about some basics of networking, basically learning.
Networking is very important because we all are connected with Internet or we can see in other terms
networking.
Swack Network is a group of two or more devices that are connected to each other to sell the data or
share the resources, so a network contains a number of different computer systems that is connected
by a physical or wireless connection like server or router.
So here, the router has direct access to the Internet, as you can see here, we are having.
OK, we're having these many clients, these are the users.
This is the router, and here we are having Internet.
So as you can see, that ROPA is in direct connection with the Internet.
OK, so that is why it is saying that the Routon has direct access to the Internet so their devices
can only connect to the Internet, to the router, or we can see access point.
Suppose, for example, the client or device connected to the network to Wi-Fi or Ethernet.
So if the client opens up the browser and typed Google dot com, then your computer will send a request
to the router.
OK, asking for Google dot com, then the router will go to the Internet and request Google dot com
here.
So will receive the Google dot com from Internet.
And then forward that particular request.
That particular request of you can see response to the computer, so now Glenn can see Google dot com
on the browser as a result.
OK, so this is all basically Internet works in a very basic manner.
So networking devices on the same computer or we can see network communicate with each other using packets.
So if you send a video log in a website, sending jet messages, sending e-mails, all the data is sent
as packet.
So networking devices ensured that these packets go in the right direction using the market just so
each packet has the same Mac address and destination entries.
And it flew from Source Mac address to the nation market as it is, because suppose you're having this
packet.
You are chatting with a friend, you are having two packets.
This is you and this is your friend, you are talking to each other now, you send the message to your
friend.
So how are your computer will know that this message should be sent to this person.
By simply giving the source, address, source, mark address and destination Mac address to this particular
packet, what it will do, it will contain the source market, which is your Mac address, and it will
contain Beom, which is destination Magruder's, which is your friend Mac.
So this that this particular packet to the French device of you can see French address.
So this is how basically networking works in computer.
And it is very important to understand if you're talking about hacking when it comes to network penetration
testing or network hacking, it is must.
And if you're talking about ethical hacking, like website hacking, computer hacking, system hacking,
so hacking and also networking.
And then it is also very important to understand networking because we all are connected to Internet
and Internet is nothing but the networking all we can say network.
So this is how it works.
And thank you for watching this lecture.