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Comparison between ipv4 and ipv6
- 1. Comparison between IPv4 and IPv6 Dharmesh Patel [email_address]
- 2. Differences between IPv4 and IPv6 IPsec header support is required IPsec header support is optional. Optional data is supported as extension headers. Header includes option. Header does not includes a checksum. Header includes a checksum. Address are 128 bits (16 bytes) in length. Address are 32 bits (4bytes) in length.
- 3. Differences between IPv4 and IPv6 IPv6 uses a link-local scope all-nodes multicast address. Broadcast addresses are used to send traffic to all nodes on a subnet. Multicast Neighbor Solicitation messages resolve IP addresses to MAC addresses. ARP uses broadcast ARP request to resolve IP to MAC/Hardware address. Stateless auto configured link local address will be obtained. (Link Local) Address can be configured manually or through DHCP
- 4. IPv6 Advantages Has larger address space. Which can be gained from the use of a 128-bit address, whereas IPv4 uses only 32 bits. The new address space thus supports 2128 (about 3.4×1038) addresses. Network security is integrated into the design of the IPv6 architecture (IPSec). It calculates the ” Linklocal ” address using MAC address and router prefix received through router advertisement, which can be used for local communication. (Stateless auto configuration)
- 5. IPv6 Contd… For stateful configuration DHCPv6 is used to get IP address. IPv6 nodes can communicate with IPv4 nodes by using v4 mapped v6 address. IPv6 packets can be sent using IPv4 networks using tunneling. In IPv6, extension headers are used to encode optional Internet-layer information. Extension headers are placed between the IPv6 header and the upper-layer header in a packet.
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