IPv6
The 128-bit successor to IPv4, written in hexadecimal, that vastly expands the address space.
IPv6 uses 128-bit addresses written as eight groups of four hexadecimal digits separated by colons, giving an address space so large it removes the need for NAT. An interface can hold several address types at once: a link-local address (fe80::/10) auto-assigned at startup for on-segment traffic like neighbor discovery, plus a routable global unicast address (2000::/3). Stateless Address Autoconfiguration (SLAAC) lets a host build its own global address from the router-advertised prefix and interface identifier, with no DHCP server needed. On the N10-009 exam, remember that routers never forward link-local addresses off the segment.
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