A network administrator is configuring SSH on a Cisco router. After setting a hostname, they issue the crypto key generate rsa command but receive an error message: % Please define a domain-name first. Which command must the administrator configure before the RSA keys can be generated?
transport input ssh
ip domain-name cisco.com
login local
username admin secret cisco
To generate RSA encryption keys using the crypto key generate rsa command, a Cisco IOS device requires both a hostname and an IP domain name. The device combines these two values to create a Fully Qualified Domain Name (FQDN) that it uses as the label for the key pair. The other commands listed are necessary for a complete SSH configuration, but they are not prerequisites for the crypto key generate rsa command itself.
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