But the private nature of Nextdoor assures random users won't be browsing the network.

WSJ: Nextdoor Review: Social Network Brings Neighbors Together

The idea is that if someone names you as a friend, you are likely to be more central to the network than a participant chosen at random.

CNN: Obesity, STDs flow in social networks

Before Macs, I had some random x86 machine that I only used for games and connecting to the Prodigy network.

ENGADGET: Growing up Geek: Philip Berne Alt

My other piece of advice when it comes to being social network savvy is to try to avoid becoming friends with or accepting random friend requests from potential criminals.

FORBES: Try To Avoid Friending Potential Burglars on Facebook (Updated)

The secure communication link is a virtual private network communication link over the computer network in which one or more data values that vary according to a pseudo-random sequence are inserted into each data packet.

FORBES: VirnetX Files Infringement Case Vs. Apple With ITC