IPv4 is an acronym standing for internet protocol version 4. It is the fourth edition of the internet protocol that was designed to identify devices on a network through an addressing system. This version was made to be used in interconnected systems of packet switched communication networks. This protocol is mostly used to connect devices to the internet. This particular internet protocol version uses a 32 bit address scheme that allows 2^32 addresses. This is the version that is currently being used to distribute IP addresses. Following its limitations there was need for a better version that would serve the same functions without problems.
This led to the development of IPv6. IPv6 is internet protocol version 6 is also known as IPng. IPng is an acronym that stands for internet protocol next generation. It is the successor to IPv4 and it is designed to allow the internet to grow increasingly in terms of the amount of data being transmitted and the number of hosts connected. Ipv6 development begun after concerns that the demand for more IP addresses would exceed those provided by IPv4. This version consists of 128 bits which is equal to2^128. Its addressing means that it can support a larger number of machines. IPv6 addresses are written in hexadecimals and separated by colons to make them more human readable.
To explain IPv4 versus IPv6 it is important to compare the differences between the two. In IPv4 addresses are 32 bits meaning they are 4 bytes in length. In this version it uses address (A) resource records in DNS to map host names to IPv4 addresses. It also uses pointer (PTR) in the IN-ADDR.ARPA DNS domain to map IPv4 addresses to host names. This version of internet protocol also makes IPSec optional and it is supported externally. The header in Ipv4 is not an identifier of packet flow for QoS handling by routers. Routers and the sending host can fragment packets in this internet protocol version.
On the other hand the Ipv6 is quite different. This version gives a specific packet format to reduce packet header processing by routers. The packet header of IPv4 and IPv6 difference makes interoperability of the two protocols impossible. Another specification that makes IPv6 more preferable is its ability to carry out transmission of a single packet to more than one destination in a single send operation. IPv6 hosts have a stateless address auto configuration that allows them to configure themselves automatically when connected to a routed an IPv6 network via internet control message protocol version. This is done by a host sending a link local router multicast request for its own configuration considerations. If the configuration is successful, the routers respond to the request with a router announcement packet containing network layer configuration considerations. In Ipv6 the process of packet forwarding and packet headers has been simplified to make it more efficient for routers. This extends the end to end principle of internet design.
When that day comes and ipv4 is no longer useful, there will be no other choice other than to move to ipv6. There are challenges in making that transition but when it eventually happens, these benefits and many more will be enjoyed.
access point vs router
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