300-410 Question 245
Single answerA network administrator is unable to access a Cisco router via SSH after making recent configuration changes. The administrator confirms that the router is reachable via ICMP (ping). Upon reviewing the configuration, they notice the following lines:
line vty 0 4 transport input none
What should the administrator do to restore SSH access?
- A
Modify the 'transport input' command to include 'ssh'.
- B
Enable the HTTP server on the router.
- C
Configure a username and password for SSH access.
- D
Reset the router to factory default settings.
Show answer and explanation
Correct answer: A
Explanation
The 'transport input none' command disables all remote access protocols, including SSH, on the VTY lines. To restore SSH access, the administrator must modify this command to allow SSH traffic using 'transport input ssh'. Other options either do not address the specific issue or involve excessive and unnecessary actions.
- A. Correct.
This is the correct answer. The 'transport input none' command disables all remote access protocols on the VTY lines, including SSH. To restore SSH access, the administrator must modify this command to 'transport input ssh'.
- B. Incorrect.
This is incorrect. Enabling the HTTP server is unrelated to SSH connectivity and is used for web-based management.
- C. Incorrect.
This is incorrect. While a username and password are required for SSH access, they are not the issue in this specific scenario since the access problem is caused by the 'transport input none' command.
- D. Incorrect.
This is incorrect. Resetting the router to factory default settings is not necessary and would cause unnecessary downtime. The issue can be resolved by modifying the 'transport input' configuration.