When an IPv6 enabled host boots, it sends a router solicitation (RS) message. An IPv6 router responds with a router advertisement (RA). Which two items are contained in the RA? (Choose two.)
正解:B,C
Explanation/Reference: Explanation: In IP Version 6, Router Advertisements have the following attributes: 1. Routers advertise periodically -- Max. time between advertisements can be in the range from 4 and 1800 seconds -- The advertisement has a lifetime (= 0 if not a default router) 2. Advertisement contains one or more prefixes -- Prefixes have a lifetime 3. Preferred lifetime 4. Valid lifetime 5. Specifies if stateful or stateless autoconfiguration is to be used 6. Plays a key role in site renumbering