Essay On Difference Between Iv4 And Ipv6

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IPv4 and IPv6’s main difference
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.
• Address
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
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Both protocols can configure automatic or manually. The automatic addressing is a well-known function in IPv6, since it can help network administer simplify the addressing process. The automatic addressing can be classified in two ways:
• Stateful Address Auto-configuration
The practice of auto-configuration in IPv4 is Dynamic Host Configuration Protocol (DHCP). DHCP achieves an automatic network configuration of the host IP address and related configuration settings. IPv6 continues this technology, but the version is DHCPv6. DHCPv6 server allocates IP addresses and related configuration for the network host. This allows the hosts know other configuration parameters or interface addresses. The networks that utilizes DHCPv6 typically require cautious govern and certainly addressing. (R. Droms, J. Bound, B. Volz, T. Lemon, C. Perkins, M. Carney 2003)
• Stateless Address Auto-configuration
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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

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