MSI RG70A - Wireless-N 2T2R Broadband Router User Manual page 69

Priority Queue
This can put the packets of specific protocols in High/Low Queue. The
packets in High Queue will process first.
Unlimited Priority Queue: The LAN IP address will not be bounded in the QoS
limitation.
High/Low Priority Queue: This can put the packets in the protocol and port
range to High/Low QoS Queue.
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