IPv4 vs IPv6: Key Differences for Developers
IPv4 vs IPv6 comparison: address formats, address space, header differences, NAT, and migration strategies.
Key Differences
- Address size: IPv4 = 32 bits (4.3 billion). IPv6 = 128 bits (340 undecillion)
- Format: IPv4 =
192.168.1.1. IPv6 =2001:0db8:85a3::8a2e:0370:7334 - NAT: IPv4 requires NAT. IPv6 gives every device a public address
- Header: IPv6 is simpler (no checksum, no fragmentation)
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