In Peer-to-Peer model of distributed system, all computers are functionally equal which can request and response messages each other.

分布式系统的对等模型中，各个节点从功能上看是对等关系，相互之间进行消息的请求和响应。

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We are evangelists for the peer-to-peer childcare model, advocates for a better, more efficient way of providing modern support to modern families.

WHITEHOUSE: Improving Childcare Services

Companies like Rhapsody and Spotify have helped spread the peer to peer sharing model while slowing down illegal downloads by now offering the music industry a portion of the ad revenue they generate.

FORBES: Music To Our Ears

Because the new operations are based on a "peer to peer" business model, "issues can arise that are out of your control, " says the 25-year-old Mr. Smith, who launched SpotHero in July 2011 as a driveway-sharing service for the Chicago market, but has since shifted its focus.

WSJ: New Turf for Sharing Services: the Driveway