Free Loop

基本解释

One limitation that applies to hubs and switches alike is that an Ethernet network must be loop-free.
集線器和交換機有同一個侷限，即以太網網絡必須是無路由循環的。
OSPF detects changes in the topology, such as link failures, very quickly and converges on a new loop-free routing structure within seconds.
OSPF探測在拓撲裡的變化，如鏈路失敗。非常迅速地，幾秒內便在新的自由環路（loop-free）路由結搆裡滙聚。
kevinchan1984.blog.163.com
Based on the analyses of traditional routing schemes proposed for satellite networks, a discrete time based loop-free routing algorithm (DTRA) for LEO satellite networks was developed.
在分析傳統衛星網絡路由算法的基礎上，提出一種基於分時的LEO衛星網絡無環路由算法（DTRA）。

The firm maintains that it had been pitching its patented noise cancellation to Apple in periodic meetings between 2007 and 2010, only to watch as 1 Infinite Loop used Audience's technology for the iPhone 4 instead -- and supposedly handed some of Noise Free's work to a competitor.
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