Netgear AC1900 Nighthawk™ Owner's Manual

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Optimize Performance 
46
Nighthawk AC1900
 Smart WiFi Router 
Prioritize Internet Traffic with Quality of Service
You can use Quality of Service (QoS) to assign high priority to gaming and video streaming. 
Upstream QoS
(gaming)
Downstream QoS
(video streaming)
Internet
Figure 6. You can prioritize downstream traffic, upstream traffic, or both
Optimize Internet Gaming with Upstream QoS
Upstream QoS prioritizes network traffic from local devices like your Xbox to the Internet. 
This provides for a lag-free online gaming experience.
Best effort traffic
High priority traffic
Internet
Figure 7. Upstream QoS assigns high priority to gaming traffic from your Xbox
NETGEAR recommends that only gamers enable the Upstream QoS feature. If you do not 
game and you turn on this feature, some applications might not perform as well as usual.