Lan and Wan and history of networks

 

 

 

History of Network:

             Network is a bunch of cables connected all over the world, in 1960’S Advanced research project agency (ARPA) has been established in USA, and its first satellite was launched within 18 months after establishment, later they used ARPANET method to share the information to other computer.

           The development of ARPANET officially began in the year 1969. It was considered as one of the first computer networks in which the first two nodes (i.e.,) UCLA (University of California) and SRI (Stanford Research Institute) were connected and has been used as packet switching.
           

          To provide more information about network protocols their procedures, and computer communications, kindly refer (RFC surfaced as a document in April 1969.)

To more know about history network click here

                    

Network:

             Basically, Networking is sharing of information or resources between two or more computers where it can be files or any other resources. They are linked through via cables, radio waves (ex: WI-FI) etc. In this section we will focus more on cables

   Networks are mainly classified into four types:

•  LAN (Local Area Network)
• PAN (Personal Area Network)
• MAN (Metropolitan Area Network)
• (Wide Area Network)

 

                             

                                                                      LAN (local area network)

 

   Let’s dive deep on LAN (Local Area Network):

   First of all, what do you mean by LAN? As the name suggest it is a group of two or more computers connected together, and a LAN is a network contained within a small geographical area, usually within the same building. Ex: Can you guess? its WI-FI

Why we are taking WI-FI as an example?

                         You can check your subnet address once you are connected to WI-FI. Also check WI-FI subnet address you will find both are connected in the same network or subnet.

Switch:

        Switch is a Networking device which transfers the packets to the device. But the device should be same subnet / network address. Assume the device is connected to the switch via Ethernet cable, once a device is connected to a switch, the device automatically starts communicating with the networkssssss, switch notes its media access control (MAC) address the switch uses the MAC address to identify which device is attached to its outgoing packets and where the incoming packets are getting delivered

In the next Blog we can focus more about Switch

 

 

Steps to check the subnet and IP Address

1.Select windows in the search bar kindly enter CMD it will direct you to the command prompt

2.Now Press Enter.

3.Type ipconfig/all press Enter.

4.Find your Network settings.

5.Your PC's IP address and your network Subnet Mask and Gateway will be listed.

 

                                              WAN (wide area network)

WAN:

   A wide area network (also known as WAN) is a large network of information that is not tied to a single location. WANs can facilitate communication, sharing of information and much more between devices around all over the World through a WAN provider. For easy understanding, in simple a wide-area network (WAN) is a collection of local area network (LANs) or other networks that communicate with one another.  

Example:

    Let’s take WI-FI, Myself surfing in the Google with my home router

It tries to push my packet to the external or disparate WAN area. Let’s perform this practically as of now you know your device IP-address and subnet mask compare with google IP address you can find diverged networking address. But you still communicate with google how this happen? Ans:  Router

                                              

Note: we cannot get internet(data) from router, router is used to push the packet from one networking device to another.

 

 

What is a Router:

              On a computer network, all devices that are connected to the same local network can talk directly with each other. But to do so they need to have IP addresses that belongs to the same IP network. Computers that belong to different IP networks have to communicate with each other via a router.

But how we get the internet:

Home router:

        Home routers consist of modem, switch, DNS etc.

ISP (internet service provider) provide the internet access through a cable and that cable is connected with a modem.

Modem:

A modem is a small box that connects your devices to the Internet using cables. Unlike a router, a modem doesn’t provide your home with Wi-Fi connectivity. A modem acts as a digital translator, taking an information signal from your cable, fiber or phone lines and making it accessible to your computer.

 

 

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