Which method can be used to limit access to NSM based on specific IP addresses?

The correct method to limit access to NSM (Network Security Manager) based on specific IP addresses is whitelisting. Whitelisting involves allowing only certain IP addresses to have access to the resources, effectively blocking all other addresses that are not included on the list.

This approach is particularly effective in enhancing security because it minimizes the attack surface. By specifying which IP addresses are permitted, organizations can focus access to trusted sources while preventing unauthorized access. This method is essential in environments where sensitive data is handled and where it's crucial to control who can reach certain systems or applications.

On the other hand, menu restriction relates to restricting access to various features or commands within an interface, which does not directly deal with IP-based access control. IP filtering typically refers to general filtering actions on IP packets in a networking context and may not focus on allowing or denying access based solely on IP addresses. Blacklisting involves creating a list of blocked IP addresses but does not proactively manage access like whitelisting does.