2. For this we have to know about the ip address of the target computer.
3. To know the target computer ip address simply follow the instructions following
open cmd for windows
type ping and see the result.
copy that ip address and use any tool that identify the open ports on the target computer.
Use advanced port scaaner for open ports on target computers.
like here is the one for windows os
how to enable it on windows operating system
1.simply go to control panel
2.open the features programs
3.select telnet client and server
4.it will be done.
open cmd and type telnet [ip address] [open port]
for password of the admin of the targeted system use any brute force password analyser.
here is link.
Download it and find the username as well as password and enjoy.