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10 Cards in this Set
- Front
- Back
Methodology |
1. Identify the problem 2. Establish a theory of probable cause 3. Test the theory to determine the cause 4. Establish a plan of action to resolve the problem and identify potential effects 5. Implement the solution or escalate as necessary 6. Verify all system functionality and if applicable, implement preventative measures 7. Document findings, actions, and outcomes |
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VoIP |
Sends voice over IP network |
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SIP |
Session initiation protocol Application layer Protocol used to create, manage, and terminate VoIP sessions |
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RTP |
Real-time Transport Protocol Used to send VoIP packets |
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QoS |
Quality of Service Prioritizing traffic based on bandwidth |
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Traffic shaping |
Used by admins to control network traffic in order to reach desired level of performance on network. Can slow other traffic down for more critical data to move through |
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Caching engines |
Downloads content from internet and stores it in memory for other clients that request the same content |
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CARP |
Common Address Redundancy Protocol Multiple systems configured to a group which makes a virtual address. One of the systems in the group answers requests sent to the virtual address of the group with other systems acting as backup systems |
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Common cable problems and solutions |
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Troubleshooting tools |
Certifier - type of cable tester that will report the same info as normal cable tester would but also reports info such as speed and duplex settings
Butt set - cable tester for phone lines
Crimper
Punch down tool
TDR - time domain reflectometer, sends signals down cable where it is reflected at some point, the distance is given of where it is deflected back and if it is shorter than cable length there is an issue with the cable
OTDR - TDR for fiber
Oscilloscope - tests cables and outputs info in graphical format
Multimeter - used to determine voltage and can measure resistance |