Continue your lesson
Tie every forwarding decision to interface state, Layer 2 state, addressing, routing, and policy.
Block 1 of 2Compare Longest prefix match · Default route
Current · 7 min
Compare Longest prefix match · Default route
Optional concept notes
Longest prefix match
Chooses the matching route with the most destination bits.
Default route
Matches a destination when no more-specific route exists.
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 2Compare Administrative distance selection · Routing metric selection
15 min
Compare Administrative distance selection · Routing metric selection
Optional concept notes
Administrative distance selection
Chooses between route sources advertising the same prefix.
Routing metric selection
Chooses the best same-protocol path for one destination.
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 3.2 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.