FIFO – First-in First-out
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FIFO – First-in First-out

First In First Out is a term used to describe routing buffers where no QoS (Quality of Service) is applied to packets entering the router. Packets are treated in the order that they are received by the router. QoS routers use processes such as weighted fair queuing and weighted round robin in order to provide QoS to IP packet services.

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