Packet scheduling

* Packet scheduling refers to the decision process used to choose which packets should be serviced or dropped.
* Buffer management refers to any particular discipline used to regulate the occupancy of a particular queue.
*At present, support is included for drop-tail (FIFO) queueing, RED buffer management, CBQ (including a priority and round-robin scheduler), and variants of Fair Queueing including, Fair Queueing (FQ) and Deficit Round-Robin (DRR).
The different strategies for Queue scheduling are:-
1. FIFO QUEUEING
2. PRIORITY QUEUEING
3. FAIR QUEUEING

4. WEIGHTED FAIR QUEUEING

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