Trailhead Module Help - Specify Trusted IP Ranges for the Org

Hello all!

I am stuck on this module required for a class.  Question reads as follows;

The first time you log in to Salesforce, the IP address is cached in your browser. Anytime you log in from a different IP address, you will be asked to verify your identity, typically by entering a verification code. You can bypass this step for trusted IP ranges. For example, suppose that your users should be able to log in without entering a verification code whenever they are in the office.

1. From Setup, in the Quick Find box, enter Network Access, and then select Network Access.
2. Click New.
3. Enter the start and end point of the range of trusted IP addresses, and click Save.

In truth, I have never worked with IP Addresses, and no matter what I come up with as a start and end point I get an error message "Invalid Internet Address". 

PLEASE HELP!  What is a good start and end point?

Thank you in advance.

-Shayla

#Trailhead Challenges  #TrailheadQuest  #Trailhead  #Trailhead Superbadges  #Trailhead Support  #TrailheadTaughtMe  #Trailhead Community  #Trailhead Playground