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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