IPV4 VS IPV6..

IPV - 4	IPV - 6
Addresses are of 32 bits	Addresses are of 128 bits
IPSec is optional and can be supported externally	IPSec support is not optional
4th version of Internet Protocol	6th version of Internet Protocol
Format of IPv4 is 0.0.0.0	Format of IPv6 is 0.0.0.0.0.0
IPv4 are manually worked and with DHCP as an additional options	IPv6 can be handled automatically and does not require manual automation or with DHCP
Headers have checksum by providing options	Headers do not have checksum

• Internet users are increasing drastically .So IPV - 4 is not enough to provide IPs to all hence IPV - 6  was adopted.

• As IPV - 6 uses IP - Sec compulsorily, it provides security to each and every packet hence it is more secured then IPV - 4.