In order to transit the network configuration to IPv6, the company needs to understand the different features and functions between IPv4 and IPv6. Both Internet protocols support the network layer of the OSI model. The main differences of two protocols are provided in the section. The detail functionalities and operations of IPv4 can be found in RFC 791. IPv6 specification is in the RFC 2460.
IPv4 address has 4 bytes that is also equal to 32 bits long. An IPv4 address is separated into two section network part and host part. The category of the address determines the proportion of each part. The first section of an IPv4 address can define the different category. There are A, B, C, D or E class of address and each class have its different usage and purpose. The practice of IPv4 address divides 32 bits into four fields. Each field includes 8 bits. Since IPv4 is binary-based, it can be converted to a decimal number from 0 to 255. For example, an IPv4 address is 11000000 10101000 00000111 00011011. The number converted into a decimal format is 192.168.7.27. The volume that 32 bits can present is 232 that are equal to 4,294,967,296. (Defense Advanced Research Projects 1981)
IPv6 address owns 16 bytes that are equal to 128 bits …show more content…
A host can generate its own address by deploying local and non-local messages that advised by neighbor routers. If a company changes their ISP, it acquires a new global address prefix from the ISP. The company router gets the new prefix of this address that uploaded by new ISP. The hosts on local link will receive a periodical advertisement message that multicast by company’s routers. Then the local hosts can automatically combine those messages and rewrite the IP address to complete the network setting. Network administer can via this function to complete the configuration conveniently and efficiently. (S. Thomson, T. Narten, T. Jinmei