Final answer:
To secure the network, the network manager should implement two-factor authentication, enforce stronger passwords, and provide education to users.
Step-by-step explanation:
To help secure the network when a user tries to access it, the network manager should implement several measures. First, they should enforce two-factor authentication, which requires users to provide two forms of identification before accessing the network. This provides an extra layer of security beyond just a username and password. Second, the network manager should enforce stronger passwords that include a combination of letters, numbers, and special characters, and require users to update their passwords regularly. Lastly, the network manager should provide education and awareness training to users to help them avoid falling victim to scams or phishing attempts.