Components of an IPv6 Router Advertisement Message

BD

An IPv6 router advertisement message is sent by a router to announce its presence and provide configuration information to hosts on a link. The message contains several components, but the two components that are specifically requested in the question are:

B. Layer 2 address of advertising router: The Layer 2 address of the advertising router is included in the router advertisement message to enable hosts to determine the MAC address of the router. This address is necessary for communication at Layer 2, which is the data link layer of the OSI model. The Layer 2 address is also known as the Media Access Control (MAC) address or the physical address.

D. Link MTU: The maximum transmission unit (MTU) is the largest packet size that can be transmitted on a network link. The link MTU is included in the router advertisement message to inform hosts of the maximum packet size that can be sent on the link. This information is important because it enables hosts to determine the maximum size of packets that they can send without fragmentation.

A. DHCPv6 request: DHCPv6 is a protocol used to assign IPv6 addresses and other configuration information to hosts on a network. However, a DHCPv6 request is not a component of an IPv6 router advertisement message.

C. Duplicate address detection notification: Duplicate address detection (DAD) is a process used to ensure that there are no duplicate IPv6 addresses on a network. If a duplicate address is detected, a notification is sent to the hosts involved. However, a DAD notification is not a component of an IPv6 router advertisement message.