IPv4 vs IPv6


Below table will help understand difference between IPv4 and IPv6 protocol –





Developed Internet Protocol version 4 Internet protocol version6
Address Size 1981 1999
Number of Addresses b232-bit number b2128-bit number
Address format 2^32 = 4,294,967,296 2^128 = 340,282,366,920,938,463,374,607,431,768,211,456
Header length Variable (20-byte) Fixed (40-byte)
Header Checksum Checksum field required for measuring error in header Checksum field eliminated from header
Dynamic addressing DHCP SLAAC/DHCPv6
IPSEC Optional Mandatory
Minimal packet size 576 byte (fragmented) 1280 bytes
Header options Yes No (extensions)
Flow No Packet flow label
Broadcast Yes. Broadcast address are used to send packets to all nodes in subnet No Broadcast address. Link local scope all-nodes multicast address is used.
Stateless auto configuration No Yes
IP mobility impractical Yes

Dear friends, you may like to visit below link about interesting facts on ipv6 and ipv4 comparison and would like to have a good insight on practicality of protocols – https://www.comparitech.com/blog/vpn-privacy/ipv6-vs-ipv4/


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