If a service needs to be guaranteed when using bandwidth and requires more bandwidth when the network is idle, which of the following DBA types should be set?

GPON network can dynamically adjust bandwidth through upstream DBA method to achieve higher bandwidth utilization.

If a service needs to be guaranteed when using bandwidth and requires more bandwidth when the network is idle, which of the following DBA types should be set?
A . Type2 guaranteed bandwidth
B . Type4 maximum bandwidth
C . Type 1 fixed bandwidth
D . Type3 guaranteed bandwidth + maximum bandwidth

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Answer: D