Network+,  Lesson 3.4: Switch Troubleshooting – TestOut

Exam Objectives Covered: 

  • 5.2 Given a scenario, troubleshoot common cabling and physical interface issues. 
  • 5.3 Given a scenario, troubleshoot common issues with network services. 
  • 5.5 Given a scenario, use the appropriate tool or protocol to solve networking issues. 

Links:

Overview:

Ethernet switches and network adapters introduce the potential for issues at the Data Link layer and can reveal subtle cabling problems and interference at the Physical layer. Diagnosing and resolving problems gets more complex as you work up through the network stack. You need to assimilate your knowledge of both cabling types and Ethernet framing with awareness of status indicators and commands for network equipment to resolve these issues.  

Text Lessons:

  • 3.4.2 Port Status Indicators 
  • 3.4.3 Switch Show Commands 
  • 3.4.4 Interface Error Counters 
  • 3.4.5 MAC Address Table 
  • 3.4.6 Network Loop and Broadcast Storm Issues 
  • 3.4.7 Power Over Ethernet Issues 

Text and Video Lessons:

  • 3.4.1 Hardware Failure Issues (1:08 minutes)  

Lab/Activity:

  • 3.4.8 Lab: Troubleshoot Disabled Ports 
  • 3.4.9 Lab: Switching Loop    

Quiz/Assessment:

  • 3.4.10 Lesson Review (16 questions) 

Topics Discussed:

  • How can you use the physical and logical topology to isolate a problem to a particular area of the network? 
  • What information can you obtain from network device status lights? 
  • Given symptoms of a particular problem, what commands should you use to gather information about an Ethernet switch’s configuration? 
  • What are the symptoms and causes of a network loop?   

Assignment:

  1. Access the TestOut Courseware through the provided link.
  2. Study Lesson 3.4: Switch Troubleshooting , and complete the 3.4.8 Lab: Troubleshoot Disabled Ports, the 3.4.9 Lab: Switching Loop and the 16 question 3.4.10 Lesson Review Exam to complete the Section.

Assigned: February 12th, 2025
Teacher Pacing Due Date: February 13th, 2025