Hi. 1
Let's talk about LAN and WAN networks, LAN stands for local area network. 2
An example of LAN is office or home network, devices on a single LAN can connect with each other, and only 3
with each other. 4
Here we have an example of an office, you will have multiple computers you will have all of them, 5
I'm assuming all of them are connected to that LAN, those, beside computers you will 6
have some printers, you will have servers and other types of devices connected and now different people 7
working on different computers can cooperate with other people on the same network. 8
So one person is completing some sort of task on one computer and can send an information whatever results 9
of his hers task is sent to another computer to another person. 10
And that way those people can communicate and work together. 11
They can print out results they can access servers or upload something to servers and so on. 12
Basically they can they can complete some sort of task working together in a network which is Coke's 13
LAN local area network another very good example of LAN local area network is your home in your home. 14
You will have multiple devices connected to the network. 15
I myself with my entire family would have probably something around a device this would have multiple 16
smartphones multiple computers smart TV tablets stuff like that mounts a lot of it and they're all connected 17
you could send files from one device to another you can use smart TV you can work with one let's say 18
your smartphone or your tablet and then you can you can cooperate kind of with work that you can have 19
you on some storage device you can have your local printer connected in the network and so all working 20
together 21
devices on a single lan can connect with each other using the internet cables and devices devices called 22
switches Internet switches all simply switches I'm sure you have seen plenty of internet cables that's 23
more or less how it looks like it's terminated with RJ 45 that's that plug is called RJ 45 it's premade 24
cable so it's kind of sealed in that plastic kind of thing but still it's the same cable as RJ 45 and 25
Cat 5 got 5 e cable connecting those object for device there are basically two types of internet cables 26
which you may encounter when working at home or in office. 27
One is trade to another was crossover when you're connecting for instance computer with computer you 28
would use crossover meaning just to two devices connected but if you're connecting your computer to 29
the network you're using straight to cable and the same as us with your office or home office the same 30
would be with the cameras and your NCR network the video recorder let's go farther. 31
That's an example of a switch or you turn that switch over we call it you have all those ports this 32
switch seems to have 24 ports now I'll also work with most likely with purely with us as it says that's 33
it's a one gig 1 gig Ethernet and let's see. 34
It says it's appear you're nuts. 35
Speed 36
OK now and so it doesn't matter anyway. 37
You can connect your devices to the two different parts and switch. 38
We'll be working like device type of that we'll be connecting those devices together 39
lan operates in one IP range and all the devices connected to it must be in that IP range which is also 40
called subnet in order to talk with each other our explain IP range and subnet. 41
Another lesson so all those devices in your office or in your home must be in the same IP range in subnet 42
to talk with each other. 43
But what if you want either no one office to talk to another office and one office is either now in 44
Dublin let's say in Dublin and the ones in New York or London. 45
So how those two lines can talk with each other and that's what the Internet is used for. 46
And see those different people all each of them can present one single line and then you can have those 47
connections will be a we'll be the Internet connecting those those different people so can have personally 48
one of these talking with person with another person in another kind of an office in the country. 49
Are you gonna have people talking and exchanging information between different homes and so on. 50
Does the internet so what is Internet. 51
Internet is example of one and one stands for wide area network 52
one connects different lines with each other so lan can connect to one with narrow case it is the Internet 53
via a device called router one router on land one can talk with another router online tool over the 54
Internet. 55
That is how Lance talk with each other. 56
They exchange information over the Internet that's an example of the some older looter brother and you 57
can see a DSL connection that's that's your connection to the Internet or one can call it that way also. 58
And that is your internet switch but all your devices will be connected that this may also have obviously 59
wireless connections that can have some wireless devices. 60
But this would be let's say why its connection and from the point of your point of view your college 61
router. 62
Most people we call that's my home router which provides me network and term connection. 63
But in reality it is one box which has inside two boxes one being a router and one being switch and 64
connected to it inside. 65
That's kind of a physically it's a one box. 66
But logically inside it has two boxes which one works as a switch for the network and your home office. 67
And this works like a internet connection to the external world and connected with each other inside 68
and that's how it works. 69
So what we take you out of that is that we have different lines connecting with each other and exchanging 70
information. 71
Okay can have single line like in this case some office a home but in our case facility. 72
This won't be computer. 73
This will the. 74
Those will be your cameras so you can have multiple cameras in the office connected to the LAN or you 75
can have multiple cameras connected to the home network your home network can have multiple cameras 76
connected and obviously and VR or DVR. 77
And that way you will be using that. 78
Thank you.