Continue your lesson
Tie every forwarding decision to interface state, Layer 2 state, addressing, routing, and policy.
Block 1 of 2Compare Copper Ethernet · Point-to-point link
Current · 18 min
Compare Copper Ethernet · Point-to-point link
Optional concept notes
Copper Ethernet
Carries electrical signals over balanced twisted-pair conductors.
Point-to-point link
Directly connects exactly two network interfaces.
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 Single-mode fiber · Multimode fiber
7 min
Compare Single-mode fiber · Multimode fiber
Optional concept notes
Single-mode fiber
Uses a narrow core for long-distance optical links.
Multimode fiber
Supports several light paths over shorter optical links.
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 1.3 for recall. The latest checkpoint needs 70% or higher; a lower result puts the lesson back near the front of your timeline.