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Which of the following series of commands will restrict Telnet access to the router?

  • A.Lab_A(config)#access-list 10 permit 172.16.1.1
    Lab_A(config)#line con 0
    Lab_A(config-line)#ip access-group 10 in
  • B.Lab_A(config)#access-list 10 permit 172.16.1.1
    Lab_A(config)#line vty 0 4
    Lab_A(config-line)#access-class 10 out
  • C.Lab_A(config)#access-list 10 permit 172.16.1.1
    Lab_A(config)#line vty 0 4
    Lab_A(config-line)#access-class 10 in
  • D.Lab_A(config)#access-list 10 permit 172.16.1.1
    Lab_A(config)#line vty 0 4
    Lab_A(config-line)#ip access-group 10 in

Answer: C

Telnet access to the router is restricted by using either a standard or extended IP access list inbound on the VTY lines of the router. The command access-class is used to apply the access list to the VTY lines.

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