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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


VoIP

Sends voice over IP network

SIP

Session initiation protocol



Application layer Protocol used to create, manage, and terminate VoIP sessions

RTP

Real-time Transport Protocol



Used to send VoIP packets

QoS

Quality of Service



Prioritizing traffic based on bandwidth

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

Caching engines

Downloads content from internet and stores it in memory for other clients that request the same content

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

Common cable problems and solutions

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