Copyright Goodheart-Willcox Co., Inc. 280 Principles of Cybersecurity Quick Look 8.2.4 Continued 5. Enter a question mark (?) to see a list of Telnet commands. What do you enter to get additional help? To exit Telnet? 6. At the prompt, enter open telehack.com. 7. There are lots of fun things to try on this site. Enter qr Cyber!, and watch a QR code be created in ASCII characters for the text Cyber!, as shown. If you have a smartphone with a QR code reader, test your code! 8. Enter cal. Calendars for the next three months are displayed. 9. Enter areacode, and then enter 740. Where is this area code found? 10. Enter ipaddr. Did this return your private or public IP address? 11. Press the [Ctrl][C] key combination to go back to the main Telnet interface. 12. Try another site: open rainmaker.wunderground.com. 13. Press the [Enter] key twice to reach the main menu, then enter 1 to view the weather forecast for selected cities.