A Virtual Private Network (VPN) is the best solution for providing encrypted remote access to email, file, and application servers. A VPN allows secure communication over a public network, such as the internet, by encrypting the data transmitted between the remote user and the company's internal network. This enables employees to access resources as if they were directly connected to the local network, while ensuring data privacy and security.
A . Disk-level encryption secures data on a physical disk but does not enable remote access.
B . Secure web gateway provides filtered internet access but is not designed for encrypted remote access to internal servers.
D . AES (Advanced Encryption Standard) is a specific encryption algorithm, but it is not a remote access solution on its own.
Reference:
CompTIA Security+ Certification Study Guide
CompTIA Network+ Certification Objectives