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Ottawa, ON
·TekSavvy Cable
reply to vientito1

Re: Please help me to understand this

There are two main parts to most QoS implementations: prioritization and managing bandwidth.

Prioritization changes the router from sending packets on as they arrived to letting some packets jump ahead of others. This helps latency for high priority traffic.

Managing the bandwidth basically ends up dropping packets or setting a packet's ECN flag when a threshold is reached so certain types of traffic do not hog the connection.
So if manually setting up QoS you want to assign priority based on what needs to have the lowest latency followed by adding bandwidth limits so the highest priority traffic doesn't take it all.