some computer Tips !

1- to rename a file or folder (mark it with single click and press F2 . write the new name)2- some default ports for well known services (protocols):      telnet      port  23      ftp          port  20 & 21      smtp       port  25      http        port  80      https       port  443      pop3      port 110      ssh         port 223- on your internet explorer address : you can write the .com