Full form: Stateless Address Autoconfiguration
Also known as: Stateless Address Autoconfiguration, stateless autoconfiguration
Quick Definition
An IPv6 mechanism where hosts automatically generate their own global address from the network prefix advertised by a router.
SLAAC allows IPv6 hosts to configure their own global unicast address without a DHCP server. The host receives the /64 network prefix from a router's Router Advertisement (RA) message, then appends its own 64-bit interface ID (using EUI-64 or a privacy extension random value) to form a full /128 address. SLAAC is stateless — no server records which address was assigned to which host.
SLAAC provides the IPv6 address and default gateway (from RA), but typically NOT the DNS server address. DHCPv6 or RDNSS options are needed for DNS. This is a common CCNA exam comparison question.
An IPv6 address automatically assigned to every interface, only valid on the local link (FE80::/10).
A globally routable IPv6 address equivalent to a public IPv4 address (2000::/3).
A method of generating a 64-bit IPv6 interface ID from a 48-bit MAC address.
SLAAC allows IPv6 hosts to configure their own global unicast address without a DHCP server. The host receives the /64 network prefix from a router's Router Advertisement (RA) message, then appends its own 64-bit interface ID (using EUI-64 or a privacy extension random value) to form a full /128 address. SLAAC is stateless — no server records which address was assigned to which host.
SLAAC provides the IPv6 address and default gateway (from RA), but typically NOT the DNS server address. DHCPv6 or RDNSS options are needed for DNS. This is a common CCNA exam comparison question.
SLAAC falls under the IPv6 domain of the 200-301 exam. Understanding it in context with related terms like global-unicast-address and eui-64 is essential for answering scenario-based questions correctly.