I. IP Address Classes
IP addresses consist of 32-bit binary numbers, which is written in 4 groups of 8 bytes (octets) separated by a dot as the example below:
11000000.00010000.00001010.00000001
Or can be written in the form of 4 groups of decimal numbers (0-255) is 192.16.10.1

Use cisco as the password. When you are finished, exit from line configuration mode.

R1(config)#line vty 0 4 // any 5 admin to access using telnet sesion

R1(config-line)#password cisco

R1(config-line)#login

R1(config-line)#exit

R1(config)#

Using password on configuration mode for safe yaour router, thats command is include line console 0 on terminal . 0 = just one line console can access to terminal.



R1(config)#line console 0


R1(config-line)#password cisco


R1(config-line)#login


R1(config-line)#exit


R1(config)#


./febtian

• Incoming Run and typing cmd;


• typing cmd in the SFC /? ,the options will appear in the picture aid hardened following
  


• when the sfc /scannow