Final answer:
A firewall protects against unauthorized access, while a digital certificate verifies the identity of users.
Step-by-step explanation:
The correct answer is option c) A firewall protects against unauthorized access, while a digital certificate verifies the identity of users.
A firewall is a security device that monitors and filters network traffic to protect against unauthorized access. It acts as a barrier between a private internal network and the public internet, allowing only safe traffic to pass through.
A digital certificate, on the other hand, is a digital document used to verify the identity of an individual or organization. It is typically issued by a trusted certification authority and contains information such as the entity's public key and other identifying details.
Both a firewall and a digital certificate play important roles in providing security to an organization, but their functions are different. While a firewall focuses on protecting against unauthorized access, a digital certificate focuses on verifying the identity of users.