Difference between IPV4 and IPV6

Difference between IPV4 and IPV6

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Difference between IPV4 and IPV6

IPv4

IPv6

IPv4 addresses are 32 bit length. IPv6 addresses are 128 bit length.
IPSec support is only optional. Inbuilt IPSec support.
Fragmentation is done by sender and forwarding routers. Fragmentation is done only by sender.
No packet flow identification. Packet flow identification is available within the IPv6 header using the Flow Label field.
Checksum field is available in header No checksum field in header.
Options fields are available in header. No option fields, but Extension headers are available.
Address Resolution Protocol (ARP) is available to map IPv4 addresses to MAC addresses. Address Resolution Protocol (ARP) is replaced with Neighbor Discovery Protocol.
Internet Group Management Protocol (IGMP) is used to manage multicast group membership. IGMP is replaced with Multicast Listener Discovery (MLD) messages.
Broadcast messages are available. Broadcast messages are not available. Instead a link-local scope all-nodes multicast address is used for broadcast.
Manual configuration (Static) of IP addresses or DHCP (Dynamic configuration) is required to configure IP addresses. Auto-configuration of addresses is available.

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