IPv6 after IPv4 depletion

 

IPv6 (Internet Protocol Version 6) is internet is next-generation protocol design  to succeed current Internet Protocol, IP Version 4.It is developed by the Internet Engineering Task Force(IETF), a corporation that develops net technologies. The IETF  created IPv6 to accommodate the growing variety of users and devices accessing the internet. In order to communicate over the web, computers and alternative devices should have sender and receiver addresses. 

These numeric addresses area unit referred to as internet Protocol addresses. Because the internet and therefore the variety of individuals exploitation it grows exponentially, therefore will the requirement for IP addresses. Specified by  routing  protocols. These packets need an addressing theme, like IPv4 or IPv6, to specify their source and destination addresses. Each host, PC or alternative device on the net needs an IP address so as to communicate. The expansion of the web has created a requirement for additional addresses than area unit attainable with IPv4.

Why IPv6 ought to be implemented?

-More economical Routing

IPv6 reduces the scale of routing tables and makes routing additional efficient and hierarchic.

-More efficient Packet process

 IPv6 is simplified packet header and makes packet process a lot of economical.

-Directed data Flows

IPv6 supports multicast instead of broadcast. Multicast permits bandwidth-intensive packet flows (like multimedia system streams) to be sent to multiple destinations at the same time, saving network bandwidth. Impartial   hosts no longer should process broadcast packets. Additionally, the IPv6 header has a new field, named Flow Label,  that may determine packets belonging to an equivalent flow.

-Simplified Network Configuration

 Address auto-configuration (address assignment) is made in to IPv6. A router can send the prefix of the native link in its router advertisements. a host will generate its own ip address by appending its link-layer (MAC) address, regenerate into Extended Universal symbol (EUI) 64-bit format, to the 64 bits of the native link prefix.

-Support for brand spanking new Services

 By eliminating Network Address Translation (NAT), true end-to-end connectivity at the IP layer is renovated, enabling  new and valuable services. Peer-to-peer networks area unit easier to make and maintain, and services are VoIP and Quality of Service (QoS) become additional sturdy.

-Security

IPSec, that provides   confidentiality, affirmation, privacy and data integrity, is baked into in IPv6. Due to their potential to hold malware, IPv4 ICMP packets are typically blocked by company firewalls, but ICMPv6, the implementation of the web management Message Protocol for IPv6, could also be permissible as a result of IPSec will be applied to the ICMPv6 packet

What is structure of IPv6 ?

In IPv4 structure, each IP address is 32 bits long, example   192.168.220.14

In IPv6 structure, each IP address is 128 bits long, example  2621:db8:frws:1:1091:05tv:gi03:0303