IPv6 or Internet Protocol version 6 is a network layer protocol that allows communication over a network. IPv6 was designed by the Internet Engineering Task Force (IETF) in December 1998 to replace IPv4 in view of the exponential growth of Internet users worldwide.
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IPv4 and IPv6
A common type of IP address (called IPv4, or "version 4"). The following is an example of an IP address:
25.59.209.224
An IPv4 address consists of four numbers, each containing one to three digits, with a dot (.) separating each number or group of numbers. Each of these four numbers ranges from 0 to 255. This independent group of numbers creates addresses that allow you and everyone around the globe to send and retrieve data through our internet connection. IPv4 uses a 32-bit addressing scheme that allows the storage of 2^32 addresses, which is more than 4 billion addresses. To date, it is considered the primary internet protocol, carrying 94% of internet traffic. Initially, it was believed that addresses would never run out, but the current situation has paved a new way for IPv6, let's see why? An IPv6 address consists of eight groups of four hexadecimal digits. Here is an example of an IPv6 address:
3001:0da8:75a3:0000:0000:8a2e:0370:7334
This new IP address version was deployed to meet the need for more Internet addresses. Its purpose is to solve the problems associated with IPv4. With a 128-bit address space, it allows for 3.4 billion unique address spaces. IPv6 is also known as IPng (Internet Protocol Next Generation).
IPv6 theoretically supports up to 340, 282, 366, 920, 938, 463, 463, 374, 607, 431, 768, 211, 456. In short, we will never run out of IP addresses again.
Types of IPv6 addresses
Now that we understand what an IPv6 address is, let's look at its different types.
Unicast address It identifies a unique node on the network, usually a single sender or a single receiver.
A multicast address represents a group of IP devices and can only be used as the destination of a datagram.
Anycast address It is assigned to a set of interfaces that usually belong to different nodes.
Advantages of IPv6
Reliability
More Speed: IPv6 supports multicasting, rather than broadcasting in IPv4. This feature allows bandwidth-intensive packet streams, such as multimedia streams, to be sent to multiple destinations at once.
Stronger security: IPSecurity is built into IPv6 to provide confidentiality and data integrity.
Routing efficiency
Most importantly, it is the ultimate solution for the ever-growing number of nodes in the global network.
Disadvantages of IPv6
Transition: Due to the widespread use of IPv4, it will take a long time to fully switch to IPv6.
Communication: IPv4 and IPv6 machines cannot communicate directly with each other. They need an intermediary technology to make this happen.
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