IPv4 vs IPv6: TUDO o que você PRECISA saber

Within the core of the internet, it is much easier to carry out this configuration and maintenance. There are already many efforts to use IPv6. Hello, how are you guys?

Today I would like to talk to you about a very important topic in the context of computer networks, more precisely at the network layer level: addressing. But what would the addressing be? Firstly, I want to make a simple analogy so that you can understand clearly.

Imagine that you have your computer and want to access a website in Japan. The question arises: how will your computer in Brazil be able to establish a connection? To do this, machines need to identify themselves on the network.

This is where the issue of addressing comes in. Addressing at the network layer level provides a way for both your computer in Brazil and the server that provides the page in Japan to communicate. In the internet model we use, TCP/IP, the IP address allows computers to be located in different parts of the world.

But when you 're at home, you don't have a real IP address. What happens is that the internet service provider has a limited set of addresses and needs to manage them, as there is a limited number of addresses in IPv4 format. IP (Internet Protocol) is essential to establish these connections.

However, your computer at home does not have a real IP address. The service provider uses techniques such as NAT (Network Address Translation) to allow the connection. NAT allows multiple devices on an internal network to share a single public IP address.

Typically, your router at home is configured with a DHCP service, which dynamically provides IP addresses. When you connect to the network, your device asks the router for an available IP address. DHCP makes IP address management easier because devices don't need to be manually configured every time they connect.

When accessing a website in Japan, your computer uses an internal IP address provided by the router, which is not visible to the internet. The connection is made through the service provider, which has real IP addresses to communicate with the server in Japan. We often access websites by URL address, not IP directly.

IPv4, created in the early days of the internet, was designed to connect many devices, but not on the scale we have today. The widespread adoption of IPv4 brought limitations, which led to the development of IPv6, which supports a much larger number of addresses. IPv6 uses a hexadecimal system, allowing for a much larger representation of numbers compared to IPv4.

However, migrating to IPv6 is complex, which is why we still use IPv4 in many cases. In internal networks, especially in internet cores, IPv6 configuration and maintenance are now more common. I hope this summary has clarified what addressing, IPv4, and the transition to IPv6 are.

See you in the next video!