To add an extra layer of remote access control to a critical online database, using a proxy server

combined with a VPN is the most effective method.

Proxy Server: Acts as an intermediary, filtering and logging traffic.

VPN: Ensures secure, encrypted connections from remote users.

Layered Security: Integrating both mechanisms protects the database by restricting direct public

access and encrypting data in transit.

Benefit: Even if credentials are compromised, attackers would still need VPN access.

Incorrect Options:

A . Incremental backups: This relates to data recovery, not access control.

C . Implementation of group rights: This is part of internal access control but does not add a remote

protection layer.

D . Encryption of data at rest: Protects stored data but does not enhance remote access security.

Exact Extract from CCOA Official Review Manual, 1st Edition:

Refer to Chapter 4, Section "Remote Access Security," Subsection "Securing Remote Access with

VPNs and Proxies" - VPNs combined with proxies are recommended for robust remote access control.