A security administrator wants to secure password exchanges on the vty lines on all routers in the enterprise. What option should be implemented to ensure that passwords are not sent in clear text across the public network?
- Use Telnet with an authentication server to ensure effective authentication.
- Apply an access list on the router interfaces to allow only authorized computers.
- Apply an access list on the vty line to allow only authorized computers.
- Use only Secure Shell (SSH) on the vty lines.
Exam with this question: CCNA Discovery 3: DRSEnt Chapter 8 Exam