D-Link DIR-655 User Manual page 47

Section  - Configuration
Name:
Create a name for the rule that is meaningful
to you.
Priority:
The priority of the message flow is entered here.
The four priorities are defined as:
BK: Background (least urgent)
BE: Best Effort.
VI: Video
VO: Voice (most urgent)
Protocol:
The protocol used by the messages.
Host IP Range:
The rule applies to a flow of messages for which one computer's IP address falls within the range set here.
Host Port Range:
The rule applies to a flow of messages for which host's port number is within the range set here.
D-Link DIR-655 User Manual