Exam N10-008 topic 1 question 678 discussion

C. Router advertisement Router advertisement is part of the Neighbor Discovery Protocol (NDP) in IPv6 and is used in Stateless Address Autoconfiguration (SLAAC) to provide network information to IPv6 hosts. Router advertisements inform hosts about the presence of routers, network prefixes for address configuration, and various other parameters necessary for the host to configure its IPv6 address and connect to the IPv6 network. This mechanism allows IPv6 devices to automatically configure themselves with an IPv6 address and other related network information without the need for a DHCPv6 server, although DHCPv6 can be used alongside SLAAC for additional configuration options like DNS server addresses.

C is correct. From Cisco: SLAAC provides the ability to address a host based on a network prefix that is advertised from a local network router via Router Advertisements (RA). RA messages are sent by default by most IPV6 routers; these messages are sent out periodically by the router and include information including: - One or more IPv6 prefixes (Link-local scope) - Prefix lifetime information - Flag information - Default device information (Default router to use and its lifetime)

SLAAC. IPv6 hosts configure themselves automatically. Every interface has a self-generated link-local address and, when connected to a network, conflict resolution is performed and routers provide network prefixes via router advertisements. So its C

C. Router advertisement Router advertisement messages are used in IPv6 networks to advertise routing information, including network prefixes, to hosts. When SLAAC is used, routers send router advertisement messages periodically, informing hosts about the network's prefix, which the hosts then use to generate their IPv6 addresses. This process allows hosts to configure their own IPv6 addresses without the need for a DHCPv6 server.

The prefix for all link-local addresses is fe80::/64. The interface identifier (or last 64 bits from left to right) of the address is typically auto-generated by using the modified EUI-64 method (RFC 4291). DHCPv6 is the opposite of SLAAC. SLAAC precludes the use of DHCPv6. You use one or the other, not both. The entire point of SLAAC is so you don't have to use DHCPv6.