Results from a vulnerability analysis indicate that all enabled virtual terminals on a router can be
accessed using the same password. The company’s network device security policy mandates that
at least one virtual terminal have a different password than the other virtual terminals. Which of the
following sets of commands would meet this requirement?

A.
line vty 0 6 P@s5W0Rd password line vty 7 Qwer++!Y password

B.
line console 0 password password line vty 0 4 password P@s5W0Rd

C.
line vty 0 3 password Qwer++!Y line vty 4 password P@s5W0Rd

D.
line vty 0 3 password Qwer++!Y line console 0 password P@s5W0Rd

Explanation:
The VTY lines are the Virtual Terminal lines of the router, used solely to control inbound Telnet
connections. They are virtual, in the sense that they are a function of software – there is no
hardware associated with them.
Two numbers follow the keyword VTY because there is more than one VTY line for router access.
The default number of lines is five on many Cisco routers. Here, I’m configuring one password for
all terminal (VTY) lines. I can specify the actual terminal or VTY line numbers as a range. The
syntax that you’ll see most often, vty 0 4, covers all five terminal access lines.