Explanation:
A centralized database (sometimes abbreviated CDB) is a database that is located, stored, and maintained in a single location.
A proxy server is a server that intercepts user requests from the internal secure network and then processes that request on behalf of the user.
The proxy server can be a computer or application program<span> that gets the requests from clients and seeks resources from other </span>servers. It is a <span>intermediary point between the end user and the backbone network.</span>
The number and letter are switched. This question needs more context to get a accurate answer.
