If a router cannot find a valid configuration file during the startup sequence, what will occur?

If a router cannot find a valid configuration file during the startup sequence, what will occur?

• The startup sequence will reset.
• The router will prompt the user for a response to enter setup mode.
• The startup sequence will halt until a valid configuration file is acquired.
• The router will generate a default configuration file based on the last valid configuration.
• The router will monitor local traffic to determine routing protocol configuration requirements.

Exam with this question: CCNA Exploration 2: ERouting Chapter 1 Exam