You've just deployed a new Cisco router that connects several network segments in your organization. The router is physically located in a server room that requires an ID for access. You've backed up the router configuration to a remote location in an encrypted file. You access the router configuration interface from your notebook computer using a Telnet client with a user name of admin and a password of admin. You have used the MD5 hashing algorithm to protect the password. What should you do to increase the security of this device