Linux Traffic Control (TC) helps in policing, classifying, shaping, and scheduling network traffic. It uses queuing disciplines (qdisc) and filters to manage and manipulate packet transmission, including mangling packet content.

The scheduling mechanism arranges or rearranges the packets before they enter or exit different queues. The most common scheduler is the First-In-First-Out (FIFO) scheduler. You can do the qdiscs operations temporarily using the tc utility or permanently using NetworkManager.

In Red Hat Enterprise Linux, you can configure default queueing disciplines in various ways to manage the traffic on a network interface.