CompTIA CASP+ Practice Test 2026 - Free CASP+ Practice Questions and Study Guide

The highest level of protection for corporate users is achieved through port security and two-factor cryptographic authentication due to the layered security approach these measures embody.

Port security helps to control access to the network by restricting which devices can communicate on specific ports, reducing the risk of unauthorized access, network attacks, and data breaches. By limiting connectivity and ensuring only authorized devices are connected, organizations can significantly enhance their network security posture.

Two-factor cryptographic authentication adds another essential layer of security. It requires users to present two different forms of identification before gaining access to systems or data. This significantly decreases the likelihood of unauthorized access, as it is much more difficult for attackers to breach accounts without both factors, which typically include something the user knows (like a password) and something the user has (like a token or a phone for OTP).

In contrast, while encryption of all email communications enhances confidentiality, it does not address issues related to network access control or user authentication directly. Firewall configurations provide an important defensive perimeter but can be circumvented if internal access controls and authentication are weak. Regular software updates are critical for patching vulnerabilities but do not directly prevent unauthorized access or protect against identity theft and phishing attacks. Thus, the combination of port security with two-factor authentication offers robust