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Network Documentation
Provides a logical diagram or the network and detailed information about each component.
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Network Topology Diagram
A graphical representation of a network that illustrates how each device is connected and its logical architecture.
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Network Configuration Table
- Contains accurate, up-to-date records of the hardware and software used in a network.
- Should provide a network engineer with all the information necessary to identify and correct the network fault.
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End-System Configuration Table
Contains baseline records of the hardware and software used in end-system devices such as servers, network management consoles, and desktop workstations.
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Network Baseline
- Used to efficiently diagnose and correct network problems.
- Documents what the network's expected performance should be under normal operating conditions.
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Systematic Approach
A troubleshooting method that analyzes the network as a whole rather than in a piecemeal fashion.
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Bottom-Up Troubleshooting
You start with the physical components of the network and move up through the layers of the OSI model until you find the cause of the problem.
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Top-Down Troubleshooting
You start with the end-user applications and move down through the layers of the OSI model until you find the cause of the problem.
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Divide-and-Conquer Troubleshooting
You start by collecting users' experience with the problem and document the system.
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Network Management System (NMS)
Responsible for managing at least part of the network.
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Knowledge Bases
An information database used to assist in the use or troubleshooting of a product.
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Protocol Analyzer
Decodes the various protocol layers in a recorded frame and presents this information in a relatively easy-to-use format.
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Network Analysis Module (NAM)
A embedded browser-based interface that generates reports on the traffic that consumes critical network resources.
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Digital Multimeter (DMM)
A test instrument that directly measures electrical values of voltage, current, and resistance.
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Cable Testers
A specialized handheld device designed to test the various types of data communication cabling.
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Optical Time-Domain Reflectometers (OTDR)
- Pinpoints the distance to a break in a fiber-optic cable.
- This device sends signals along the cable and waits for them to be reflected.
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Cable Analyzers
A multifunctional handheld device that is used to test and certify copper and fiber cables for different services and standards.
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Portable Network Analyzers
- A portable device that is used to troubleshoot switched networks and VLANs.
- shows the port to which the device is connected and the average and peak utilization.
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Physical Topology
The mapping of a network that shows the physical layout of equipment, cables, and interconnections.
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Logical Topology
Describes the arrangement of devices on a network and how they communicate with one another.
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Jabber
The condition in which a network device continually transmits random, meaningless data onto the network.
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