A network administrator needs to allow only one Telnet connection to a router. For anyone viewing the configuration and issuing the show run command, the password for Telnet access should be encrypted. Which set of commands will accomplish this task?

A network administrator needs to allow only one Telnet connection to a router. For anyone viewing the configuration and issuing the show run command, the password for Telnet access should be encrypted. Which set of commands will accomplish this task?

A.
service password-encryption 
access-list permit 192.168.1.0.0.0.0.255 
line vtyO 4 
login 
password cisco 
access-class 1

B.
enable password secret 
line vtyO 
login 
password cisco

C.
service password-encryption 
line vty1
login 
password cisco

D.
service password-encryption 
line vtyO 4 
login 
password cisco