Layer 1 Troubleshooting - Cabling, Power, and Environmental Faults - Network+ N10-009
Watch on YouTube Layer 1 troubleshooting covers cable faults, distance and attenuation, EMI and RFI, PoE budgets, UPS and grounding, and transceiver and environmental failures for the CompTIA Network+ N10-009 exam. This video walks through opens, shorts, split pairs, and miswires, the 100 meter copper limit, multimode and singlemode fiber distance tiers, the three IEEE PoE standards (802.3af, 802.3at, 802.3bt), classic EMI sources like fluorescent lights, motors, and elevators, and the LED cheatsheet that diagnoses a dead port in 30 seconds. Watch the next video in the playlist for Layer 2 troubleshooting including spanning tree loops, MAC address table issues, and duplex mismatch.
▶ Watch next: Layer 2 Troubleshooting - STP Loops, MAC Tables, Duplex Mismatch - Network+ N10-009 https://www.youtube.com/watch?v=jWimGm9igi4
Chapters
- 0:00 Layer One - If It Is Not Physical, It Is Not This Episode
- 2:41 Cable Faults - Opens, Shorts, and Split Pairs
- 5:24 Distance and Attenuation - Copper and Fiber Limits
- 7:59 EMI, RFI, and the Noisy Neighbor Problem
- 10:25 Power Problems - PoE Budgets, UPS Flaps, and Grounding
- 12:58 Environmental and Transceiver Faults - Heat, Dust, and Dead SFPs
- 16:20 Quiz Time
Layer 1 troubleshooting covers cable faults, distance and attenuation, EMI and RFI, PoE budgets, UPS and grounding, and transceiver and environmental failures for the CompTIA Network+ N10-009 exam. This video walks through opens,...
Key Topics
- Layer One - If It Is Not Physical, It Is Not This Episode
- Cable Faults - Opens, Shorts, and Split Pairs
- Distance and Attenuation - Copper and Fiber Limits
- EMI, RFI, and the Noisy Neighbor Problem
- Power Problems - PoE Budgets, UPS Flaps, and Grounding
- Environmental and Transceiver Faults - Heat, Dust, and Dead SFPs