The OSPF Hello protocol performs which of the following tasks? (Choose two.)

OSPF routers send Hello packets out their interfaces to multicast addresses, enabling them to dynamically discover other OSPF-speaking routers on the same segment without manual configuration. When a router receives a Hello packet from a new potential neighbor, it can begin the process of forming an adjacency.

OSPF detects unreachable neighbors based on the Dead Interval, which is typically 40 seconds on broadcast networks (4 * 10-second Hello interval), not a fixed 90-second interval.

After discovery, OSPF Hello packets are periodically exchanged between neighbors to ensure their continued presence and operational status. If a router fails to receive Hello packets from a neighbor within a specified Dead Interval (typically four times the Hello Interval), it declares the neighbor down, thus maintaining active neighbor relationships.

While Hello packets contain parameters like the network mask, hello/dead intervals, and stub area flag, the negotiation of these parameters is implicit in forming an adjacency if they match, rather than an explicit "negotiation" as per the Hello protocol's primary task.

The Designated Router (DR) election process uses Hello packets to exchange router priorities and router IDs, but the DR is not elected based on link speed.

Hello packets are sent to multicast addresses (224.0.0.5 or 224.0.0.6) on the local segment, not broadcast throughout the entire internetwork to discover all OSPF routers.