Cisco Certified Network Associate (CCNA) Practice Exam

In configuring PAP, which username should be defined on the client router?

1. Server hostname

2. Client hostname

3. Remote username

4. Local hostname

The correct answer is: Local hostname

In Point-to-Point Protocol (PPP) authentication using Password Authentication Protocol (PAP), the configuration requires that the client router provides a username that corresponds to an account recognized by the authentication server. In this context, the username defined on the client router must be aligned with the local authentication settings that match what the server expects. Selecting the local hostname as the username is appropriate because it typically represents the identity of the device making the authentication request, allowing the server to directly map it to a locally defined user account. This ensures proper authentication, as the authentication server uses this username to look up the relevant credentials, validating access reliably. Other options like server hostname or client hostname may lead to mismatches, as they may not correlate with the authentication server's expected parameters or user accounts. Remote username typically refers to the credentials specifically defined on the server rather than the client side. Hence, defining the local hostname aligns with the requirements for PAP, facilitating successful authentication and proper network connectivity between the client and the server.