Cisco Cyber Security Practice Exam 2026 – Your All-in-One Guide to Exam Success!

The option regarding public network access represents a method that would not be effective in keeping unauthorized users out of a private network. This is because public network access essentially invites anyone to connect. When a network is accessible publicly, it lacks the necessary barriers or controls to restrict access, making it easy for unauthorized users to infiltrate the network.

In contrast, other methods are designed explicitly to enhance the security posture of a network. Network Access Control (NAC) enforces security policies on devices attempting to access the network, ensuring that only compliant devices are allowed entry. Strong password policies require users to create complex passwords, making it significantly harder for unauthorized individuals to gain access. Two-factor authentication adds an additional layer of security by requiring not just a password but also a second form of verification, further deterring unauthorized access.

Therefore, the presence of public network access undermines the overall security strategy, as it does not restrict user access effectively, allowing anyone to connect to the network regardless of their authorization status.