Final answer:
The purpose of the 'routing-table database' is to retrieve routing table information for determining the optimal path for transmitting data packets across a network.
Step-by-step explanation:
The subject of this question is Computers and Technology. It is asking about the purpose of the 'routing-table database'.
The correct answer is A) Retrieval of routing table information from the database.
This database stores information about network routes, and the purpose of retrieving information from the routing table database is to determine the optimal path for transmitting data packets across a network.