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chapter_19 - Todd Lammles CompTIA Network Chapter 19...

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Click to edit Master subtitle style Todd Lammle’s CompTIA Network+ Chapter 19: Network Troubleshooting Instructor:
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Chapter 19 Objectives The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 4.6 Given a scenario, implement the following network troubleshooting methodology Information gathering – identify symptoms and problems Identify the affected areas of the network Determine if anything has changed Establish the most probable cause Determine if escalation is necessary Create an action plan and solution identifying potential effects Implement and test the solution Identify the results and effects of the solution Document the solution and the entire process 2
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3 4.7 Given a scenario, troubleshoot common connectivity issues and select an appropriate solution Physical issues: Cross talk, Nearing cross talk Attenuation, Collisions, Shorts Open impedance mismatch (echo), Interference Logical issues: Port speed, Port duplex mismatch Incorrect VLAN Incorrect IP address Wrong gateway, Wrong subnet mask, Wrong DNS Issues that should be identified but escalated: Switching loop Routing loop, Route problems Proxy arp, Broadcast storms Chapter 19 Objectives (cont)
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Chapter 19 Objectives (cont) 4 Wireless Issues: Interference (bleed, environmental factors) Incorrect encryption Incorrect channel Incorrect frequency ESSID mismatch Standard mismatch (802.11 a/b/g/n) Distance Bounce Incorrect antenna placement
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Network Troubleshooting 5 Troubleshooting computers and networks is a combination of art and science, and the only way to get really good at it is by doing it.
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