Continue your lesson
Tie every forwarding decision to interface state, Layer 2 state, addressing, routing, and policy.
Block 1 of 3Compare QoS classification · QoS marking
Current · 12 min
Compare QoS classification · QoS marking
Optional concept notes
QoS classification
Groups packets into traffic classes using matching criteria.
QoS marking
Writes a priority value such as DSCP into packet metadata.
Complete one provider lesson, then answer four related questions. That is enough for today; more practice is optional.
Your lesson stays open here while the provider opens in another tab. Choose one source; the notes above are optional.
Block 2 of 3Understand QoS queuing
6 min
Understand QoS queuing
Optional concept notes
QoS queuing
Schedules packets from different classes during interface congestion.
Complete one provider lesson, then answer four related questions. That is enough for today; more practice is optional.
Your lesson stays open here while the provider opens in another tab. Choose one source; the notes above are optional.
Block 3 of 3Understand Traffic policing
9 min
Understand Traffic policing
Optional concept notes
Traffic policing
Drops or remarks traffic that exceeds a configured rate.
Complete one provider lesson, then answer four related questions. That is enough for today; more practice is optional.
Your lesson stays open here while the provider opens in another tab. Choose one source; the notes above are optional.
Practice the reasoning here
Write or inspect a small Cisco configuration, name the expected show-command evidence, and explain how a frame or packet crosses it.
- State the expected result before changing or testing anything.
- Name the observation, command, log, or report that would confirm it.
- Explain why the closest alternative does not fit the same requirement.
Check the whole objective
This unlocks objective 4.7 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.