The Origins and Evolution of Networks

🔍 A network is the interconnection of two or more computers through a transmission medium.

📡 The evolution of networks includes both wired (coaxial cable, fiber optics) and wireless (infrared, Bluetooth, wireless waves, microwaves) mediums.

🌐 Networks are interconnected to facilitate communication and data transfer between computers.

💡 Networks allow for the sharing of devices and information, such as printers, scanners, and files.

📡 The origins of networks can be traced back to the 1950s with the emergence of ARPANET, a military-based network.

🌐 In the 1960s, networks expanded to include government institutions, leading to the development of ARNET GARNETT.

🌐 Internet, also known as the world wide web (www), emerged in the 70s and 80s, allowing global communication and resource sharing.

🔗 Schools and businesses could communicate within their networks through the emergence of networks and protocols.

💻 Internet is the largest network globally, enabling communication between countries and the sharing of resources.

The most commonly used protocols for internet communication are HTTP and FTP.

HTTP is the protocol used for transferring hypertext, enabling us to access websites.

FTP allows us to download files from the internet, such as music or videos.

🌐 The domain name system (DNS) is a useful protocol that allows us to easily access websites through domain names.

💻 Devices on a network are identified by their IP address, and communication and identification occur through the network.

📶 The development of wireless networks has experienced significant growth in recent years.

💻 In the early days of internet, a modem and RJ45 connection were required to connect to the internet.

🔒 Users could steal or share usernames and passwords, allowing multiple people to access the internet using one paid subscription.

📞 If multiple people tried to connect using the same paid subscription, the connection could be disrupted by calling the number multiple times.

💡 In the early days of the internet, connecting to certain websites and downloading images cost money, leading to cases where people who didn't pay for internet services were charged for visiting adult websites or downloading paid images.

🔍 This resulted in instances where people received high internet bills due to unauthorized use of their internet connection to access these paid websites and download images.

💻 Nowadays, this issue has been resolved with the availability of free access to websites and images, eliminating the need for individuals to worry about unexpected charges for internet usage.