Answer D,E is correct: D. crypto key generate rsa modulus 2048; E. transport Input ssh. Secure Shell requires RSA keys and the VTY lines must permit SSH. For current security practice, a 2048-bit RSA modulus is the better choice than 1024-bit keys. The transport input ssh command restricts remote access to SSH instead of permitting insecure Telnet. The transport input all option would still allow Telnet and fails the requirement to replace Telnet with encrypted access. Cisco CCNA 200-301 v1.1 Security Fundamentals expects engineers to combine cryptographic key generation, local/domain prerequisites, and VTY transport settings when enabling SSH. The corrected answer pair is crypto key generate rsa modulus 2048 and transport input ssh. Together, they create the cryptographic material and enforce the encrypted management protocol on the line configuration.