What is the outcome of entering these commands? R1(config)# line vty 0 4 R1(config-line)# password check123 R1(config-line)# login

     A.    ensures that a password is entered before entering user EXEC mode
     B.    sets the password to be used for connecting to this router via Telnet
     C.    requires check123 to be entered before the configuration can be saved
     D.    creates a local user account for logging in to a router or switch 

ANS: B