Final answer:
Social networking is based on the six degrees of separation concept, where you can connect with anyone through a chain of no more than six links.
Step-by-step explanation:
The concept that social networking is based on is called the six degrees of separation. It posits that you can connect with anyone through a chain of no more than six introductions or personal links. This means that you are only six steps away from being connected to anyone else in the world, through a series of acquaintances.