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

In OSPF (Open Shortest Path First), the correct type of packet sent to request the routing database from neighbors is the Link State Request. This packet is a part of the OSPF protocol's mechanism for ensuring that all routers in an OSPF area have a consistent view of the network topology.

When an OSPF router discovers a neighbor and establishes an adjacency, it begins the process of database synchronization. If a router determines that it lacks certain information that its neighbor possesses, it sends a Link State Request packet. This request specifically asks for the detailed information about particular link-state advertisements (LSAs) that the router needs to update its own link-state database.

This process is crucial because OSPF relies on each router having an identical link-state database to calculate the shortest paths through the network accurately. By utilizing Link State Requests, OSPF ensures that the routing information remains consistent among all routers in the network.

Understanding the role of the other packet types provides context for why they are not the correct answer. For instance, a Link State Update packet is used to send LSAs, which include information about the routing database but not specifically for requesting it. Database Description packets are exchanged during the initial database synchronization process to summarize the contents