Cisco ENCOR Practice Exam 2025 – All-in-One Comprehensive Guide to Mastering Enterprise Network Core Technologies!

The OSPFv3 packet type that responds with link-state acknowledgments is the Link-state Update packet. When OSPFv3 routers need to exchange routing information, they use Link-state Update packets to disseminate information about the network topology. These packets contain updated link-state information, which is necessary for all routers in the OSPF area to have a synchronized view of the network.

After receiving a Link-state Update, a router sends back a Link-state Acknowledgment (LSAck) packet to confirm receipt of the updated information. This acknowledgment process is crucial to ensure that all routers are aware of changes in the network and can maintain accurate routing tables.

In contrast, other OSPFv3 packet types serve different purposes. For example, Hello packets are used to establish and maintain neighbor relationships between routers but do not carry link-state information. Database Description packets help in the initial exchange of link-state information but are not responsible for link-state acknowledgments. Link-state Request packets are sent by routers to request specific link-state information from their neighbors but do not directly lead to link-state acknowledgments either. Therefore, the Link-state Update is the appropriate choice for prompting link-state acknowledgments in OSPFv3 communication.