Mark queue type that uses fairness principle between sub-queues, allows users to choose classifier queues, and apply a limit to each sub-queue?

The correct answer is based on the characteristics of the queue types in MikroTik. The PCQ, or Per Connection Queue, is designed to ensure fairness in bandwidth allocation among multiple connections. It achieves this by dividing traffic into multiple sub-queues, allowing each sub-queue to handle traffic from different connections individually. This method prevents any single user or connection from monopolizing the available bandwidth, thereby adhering to the fairness principle.

In PCQ, administrators can configure rate limits for each sub-queue, ensuring that users receive a proportional share of the available bandwidth based on the defined parameters. This is particularly important in scenarios where multiple users are sharing the same internet connection, as it helps to maintain balanced network performance and user experience.

Additionally, PCQ allows for classifier queues, which means you can identified and manage different types of traffic. This flexibility can be critical in optimizing network resources based on varying traffic needs or quality of service requirements.

In contrast, other queue types such as SFQ (Stochastic Fair Queueing), BFIFO (Basic First In First Out), and RED (Random Early Detection) serve different purposes and may not implement the same principles of fairness or configurability of limits for individual users as effectively as PCQ does. Thus, PCQ