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Which of the following commands will configure all the default VTY ports on a router?

  • A.Router#line vty 0 4
  • B.Router(config)#line vty 0 4
  • C.Router(config-if)#line console 0
  • D.Router(config)#line vty all

Answer: B

Correct answer: Router(config)#line vty 0 4

Two things must be right: the mode and the range. VTY lines are configured from global configuration mode, not from privileged exec and not from interface configuration mode, and the five default lines are numbered 0 to 4. There is no all keyword, and line console 0 configures a different line entirely.

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