What are two ICMPv6 messages that are not present in ICMP for IPv4? (Choose two.)

ICMPv6 (Internet Control Message Protocol for IPv6) includes several messages that are not present in ICMP for IPv4 due to the differences between the IPv6 and IPv4 protocols. Among the listed options, the two ICMPv6 messages that are not present in ICMP for IPv4 are:

1. Router Advertisement: This is part of the Neighbor Discovery Protocol (NDP) in IPv6. Router Advertisements are sent by routers to advertise their presence along with various link and Internet parameters.
2. Neighbor Solicitation: This is also part of NDP in IPv6. Neighbor Solicitations are used by nodes to determine the link-layer address of a neighbor, or to verify that a neighbor is still reachable via a cached link-layer address.

The other options, such as “Destination Unreachable” and “Time Exceeded,” exist in both ICMPv6 and ICMP for IPv4. “Route Redirection” is a message type in ICMP for IPv4 but not used in ICMPv6. “Host Confirmation” is not a standard message type in either ICMPv6 or ICMP for IPv4.