What Does SLAAC Mean in 200-301?
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.
Full Definition
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.
Exam Trap — Don't Get Fooled
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.
Related 200-301 Terms
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.
Frequently Asked Questions
What does SLAAC mean on the 200-301 exam?
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.
How does SLAAC appear as a trap on the 200-301?
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.
How important is SLAAC on the 200-301 exam?
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.