Which two characteristics of a link-state routing protocol are true? (Choose two.)
A. It sends periodic updates.
B. It has a higher CPU requirement than distance-vector protocols.
C. It supports a hop-count limit.
D. It receives updates on the multicast address.
E. It receives updates on the broadcast address.
it sends a periodic hello updates are not periodic, only when there is something to update
Agreed, I had a similar question on Boson and it referenced the routing table being updated every 30 minutes.
Although answers B and D are true, Answer A is true as well:
“OSPF sends hellos every 10 seconds and refreshes its link-state advertisements (LSAs) every 30 minutes. These functions maintain neighbor relationships and ensure that the link-state databases are accurate and use far less bandwidth than similar functions in Routing Information Protocol (RIP) and Interior Gateway Routing Protocol (IGRP)”
https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/5132-dc.html#lsarefresh