We see fast growth in Internet users in recent years, and this growth is a challenge for Internet management teams, owners, and service providers. Internet infrastructure expands on a daily basis and enjoy Internet service in villages and remote areas. Increased use also increases online tools. Starting Internet Protocol Addressing (a given IP address for each online entity) is designed for 32 bits, and this scheme is an IP version IPv4.IPv4 such as 203.128.076.001. a decimal number is used to make IPv4 addresses more comfortable for a person, and a 32-bit address is divided by four decimal digits with the period (.) character. Calculating these decimal values ​​and getting the total number of devices involved in this protocol (256x256x256x256) = allows for the 4.294.967.296 address. There are about 4 billion titles and no one in the early days of the internet can think 4 billion slots will be complete. here we look at some disadvantages of IPv4, as we have seen the problem of managing abilities, and then we go through the solution to replace the IPv4 and address the structure of the new addressing system. Disadvantages of New Features of IPv4 and IPv6

Rapid Internet Growth and Depletion of IPv4 Addressing

IPv4 addresses 4 294 967 296 addresses, which is about 4 billion and IP allocation limits the public IP address of IP addresses, address for a few hundred million. This limitation company is used by NAT (Network Address Translator) to map individual public IP addresses to multiple private IP addresses.

IPv4 Security at IP Level

During publishing, encryption of data is required to protect your privacy and privacy. After a while, we already have the security of IPv4 packets. This security is familiar with Internet protocol security or IPSec, but this is optional for IPv4.

Maintaining large routing tables on the Internet backbone network

The distribution of IPv4 network identifiers is very critical, currently there are more than 87,000 routers on the internet router today. Router Infrastructure Based on Flat and Hierarchical Routing

Quality of Service in IPv4

Nowadays internet users are not only browsing and search data limited. Current users are well versed in text and voice and video chat, video conferencing, and online video libraries. This type of communication requires real-time data transfer to the quality of the service. Typically, for such services, the UDP (User Data-gram Protocol) or TCP (Transmission Control Protocol) protocol is used. The IPv4 TOS field has limited functionality and time redefined and locally interpreted. In addition, a load identifier using a TCP or UDP port is not possible when IPv4 packet data is encrypted

IPv6

As we see, there are some basic problems in IPv4 practice, now we look at some new IPv6s. here I like to describe the basic features of IPv6. Installing IPv6 is a big challenge for Internet management teams, owners, and service providers. It's hard but not impossible. Here you can see the benefits of IPv6. Maximum upgrade jump from IPv4 32-bit IPv6 128-bit.

IPv6 Header Format

The new header is designed to minimize the header. migrating non-essential and optional fields to the extensions that are placed after the IPv6 header. The IPv6 header works more efficiently with intermediate routers and generates efficiency. IPv6 is 4 times larger than IPv4 and its header size is twice that of the older version.

IPv6 Large Address Range

IPv6 Source and Destination Addresses are based on a 128-bit version. 128-bit addressing may result in more than 3.4 x 1038 possible combinations. At present, we can say that this is enough, but who know about the future, it may well have been having similar problems over IPv4 over the past few decades. 128-bit addressing allows us several levels of subnet and address allocation. So we can say that we have a lot of titles for future use.

Addressing and Managing the IPv6 Infrastructure Efficiency

IPv6, which provides efficient, hierarchical and comprehensible routing infrastructure, multi-level ISPs. Reduces the size of the routing table routing networks.

Security features already embedded

IPv6 is supported by IPsec (support for AH and ESP headers) and supports mobile IPv6 mobility. IPSec, based on two types of extensions, and a protocol for negotiating security settings. The authentication header (AH) provides data integrity, data authentication, and replay protection for the entire IPv6 packet. For better-format developers who have built-in security features designed to develop IPv6, not to rotate it later.

IPv6 Quality of Service (QoS)

As we have seen UDP and TCP protocols for streaming and other multimedia services over the Internet. This is because of the increasing use of these services from day to day. IPv6 has a flow field in its header, which better and specially handles packets from source to target. Data traffic is identified in the IPv6 header, QoS support can be implemented even if the packet delivery network is encrypted with IPSec and ESP.

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