Netgear DGFV338 사용자 설명서

Security and Firewall Protection

4-19

This setting determines the priority of a service, which in turn, determines the quality of that 
service for the traffic passing through the firewall. The user can change this priority for Outbound 
Services only.

The QoS priority definition for a service determines the IP packets queue for outbound traffic 
passing through the ProSafe DGFV338 for this service. The priorities are defined by “Type of 
Service (TOS) in the Internet Protocol Suite” standards, RFC 1349. The router marks the Type Of 
Service (TOS) field as defined below: 

•

Normal-Service: No special priority is given to the traffic. The IP packets for services with 
this priority are marked with a ToS value of 0. 

•

Minimize-Cost: Used when the data must be transferred over a link that has a low 
transmission cost. The IP packets for this service priority are marked with a ToS value of 1.  

•

Maximize-Reliability: Used when data needs to travel to the destination over a reliable link 
with little or no retransmission. The IP packets for this service priority are marked with a ToS 
value of 2.  

•

Maximize-Throughput: Used when the volume of data transferred during an interval is 
important even though it may have a high link latency. The IP packets for this service priority 
are marked with a ToS value of 4.