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Migrating From IPv4 to IPv6: What You Need to Know | HiTechNectar

Migration from IPv4 to IPv6 has been in talks in the last few years. The migration is happening due to depletion of IP addresses in IP version 4. This IPv4 address exhaustion has been anticipated since 1980. This is one of the reasons for the development and deployment of the IPv6 and hence the migration to the same. When one says “IP address exhaustion”, it means the reduction in the number of available IP addresses in the pool of unallocated IP addresses.
However, the migration hasn’t picked up as much pace as per expectations. Let’s look at the basics first and see why the transition is necessary.

What is IPv4 and IPv6?

IP is short for Internet Protocol, the standard for transferring data over the internet in the form of datagrams. This protocol defines formats such as header, body and footer for efficient communication over the internet. IP is used in combination with a high-level protocol TCP which stands for Transmission Control Protocol. TCP sets up a virtual connection between the sender and receiver systems.
Networks use TCP/IP for two principal purposes:
  1. Identification of host and network
  2. Location addressing
These are executed with the help of IP addresses. IP address is a numerical label assigned to each device connected to a computer network which uses IP.

So what’s the difference between IPv4 and IPv6?

IPv6 is the next-gen internet protocol which is an upgrade over the previous v4. The major difference between v4 and v6 is the bit address. IPv4 uses 32-bit addresses which have the format XXX:XXX:XXX:XXX whereas IPv6 uses 128-bit addresses as XXX:XXX:XXX:XXX:XXX:XXX:XXX:XXX.

Why IPv6?

IPv4 has provision for over 4 billion IP addresses. However, they aren’t enough owing to the growth in the number of devices using the internet.
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