Explain the structure of IPv6 address. Compare IPv6 address with IPv4 address.

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Suresh Chand · Accepted Answer

An Internet Protocol Version 6 address (IPv6 address) is a numeric label used to identify and locate a network interface of a computer or a network node participating in a computer network using IPv6. IP addresses are included in the packet header to indicate the source and the destination of each packet. The IP address of the destination is used to make decisions about routing IP packets to other networks. IPv6 Structure: This address type is equivalent to IPv4’s public address. Global Unicast addresses in IPv6 are globally identifiable and uniquely addressable. Global Routing Prefix: The most significant 48-bits are designated as Global Routing Prefix which is assigned to the specific autonomous system. The three most significant bits of Global Routing Prefix are always set to 001. Difference between IPv4 and IPv6: The difference between IPv4 and IPv6 is: IPv4 IPv6 IPv4 has a 32-bit address length IPv6 has a 128-bit address length It Supports Manual and DHCP address configuration It supports Auto and renumbering address configuration In IPv4 end to end, connection integrity is Unachievable In IPv6 end to end, connection integrity is Achievable It can generate 4.29×109 address space The address space of IPv6 is quite large it can produce a 3.4×1038 address space The Security feature is dependent on the application IPSEC is an inbuilt security feature in the IPv6 protocol Address representation of IPv4 is in decimal Address Representation of IPv6 is in hexadecimal Fragmentation performed by Sender and forwarding routers In IPv6 fragmentation is performed only by the sender In IPv4 Packet flow identification is not available In IPv6 packet flow identification are Available and uses the flow label field in the header In IPv4 checksum field is available In IPv6 checksum field is not available It has broadcast Message Transmission Scheme In IPv6 multicast and anycast message transmission scheme is available In IPv4 Encryption and Authentication facility not provided In IPv6 Encryption and Authentication are provided IPv4 has a header of 20-60 bytes. IPv6 has a header of 40 bytes fixed IPv4 consists of 4 fields which are separated by a dot (.) IPv6 consists of 8 fields, which are separated by a colon (:) IPv4’s  IP addresses are divided into five different classes. Class A, Class B, Class C, Class D, Class E. IPv6 does not have any classes of IP addresses. IPv4 supports VLSM(Variable Length subnet mask). IPv6 does not support VLSM. Example of IPv4:  66.94.29.13 Example of IPv6: 2001:0000:3238:DFE1:0063:0000:0000:FEFB

Explain the structure of IPv6 address. Compare IPv6 address with IPv4 address.

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Explain the structure of IPv6 address. Compare IPv6 address with IPv4 address.

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