What type of users are considered in the Secrets window of the PPP menu?

The Secrets window in the PPP (Point-to-Point Protocol) menu is specifically used to manage authentication credentials for various types of PPP connections. The correct choice focuses on L2TP (Layer 2 Tunneling Protocol) users, which is a common protocol for creating VPNs.

In the context of MikroTik, the Secrets window stores usernames and passwords that are utilized for authenticating both L2TP and other PPP implementations such as PPPoE and PPTP. However, the emphasis on L2TP is significant because of its wide usage for secured data transport over the internet. When you configure L2TP, the relevant user authentication is set up in this window, ensuring that only authorized users can establish a connection.

Whether it is PPTP or PPPoE, while user credentials are indeed required, the distinct nature of L2TP in the context of tunneling and maintaining stateful connections in a secure manner makes it the pivotal focus for those configurations in the PPP menu. This is why recognizing L2TP users within the Secrets window is crucial for managing secure access for that specific protocol.