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2.8.2. Key Differences

Key IPv6 Differences from IPv4

FeatureIPv4IPv6
Address length32 bits128 bits
NotationDecimal (192.168.1.1)Hexadecimal (2001:DB8::1)
BroadcastYesNo (uses multicast instead)
ARPYesNo (uses NDP)
HeaderVariable length, 12+ fieldsFixed 40 bytes, 8 fields
FragmentationRouters and hostsHosts only
DHCPDHCPv4DHCPv6 or SLAAC