Free CompTIA Network+ N10-009 Practice Question

Using a Public Key Infrastructure (PKI) system is the most effective method to ensure the authenticity, confidentiality, and integrity of secure communications across a network. PKI employs a pair of public and private keys to encrypt and decrypt data, along with digital certificates issued and verified by a Certificate Authority (CA), thus maintaining secure transmissions. While other options like access control lists and firewalls are critical to comprehensive network security, they do not directly address the specific needs of data encryption and key management intrinsic to PKI.