Troubleshooting Methodology Flashcards
What are the steps of troubleshooting?
Identify the problem Establish a theory of probable cause Test the theory to determine the cause Establish a plan of action Implement the solution or escalate Verify full system functionality Document findings, actions outcomes
What is a short vs open in a copper cable?
A short is the cables aligned incorrectly
An open is a break in the cable
What is cross talk?
A signal from one wire interfering with another
What are EMI and RFI?
Electromagnetic Interference
Radio Frequency Interference
What is attentuation/Db loss?
Signal getting weaker over distance
What is a cable TDR?
Time Domain Reflectometer
Determines the distance at which a problem is occurring within a cable
What is FHRP (First Hop Redundancy Protocol)?
Utilising 2 routers as a fail-over, they communicate with each other so if one goes down it will fail-over
Uses virtual IP and MAC
What open standard creates a redundancy group to share an IP address?
CARP
Command Address Redundancy Protocol
What is the first step of troubleshooting methodology?
Identify the problem
What is the second step of troubleshooting methodology?
Establish a theory of probable cause
What is the third step of troubleshooting methodology?
Test the theory of probable cause
What if the fourth step of troubleshooting methodology?
Establish a plan of action
What is the fifth step of troubleshooting methodology?
Implement the solution or escalate
What is the sixth step of troubleshooting methodology?
Verify full system functionality
What is the seventh step of troubleshooting methodology?
Document findings and outcomes
