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What I need to study
For the CompTIA test
| Question | Answer |
|---|---|
| relative humidity | 35-70%, and temperature between 72-77 |
| Alkaline batteries | Recycle alkaline batteries if possible, |
| Button batteries | contain mercuric oxide, lithium, silver oxide, or zinc-air. Return them to the manufacturer, recycle them, or contact local authorities for disposal procedures. |
| Nickel metal hydride (NiMH) batteries | Recycle NiMH batteries. Lithium batteries are considered a non-hazardous waste. |
| CRT monitor | Contact local authorities for recycling CRTs. They contain many toxic and caustic substances that are illegal to incinerate. Discharge CRTs before disposal, as they can contain high voltages. |
| Surge | Over-voltage that lasts seconds |
| Spike | Over-voltage that lasts milliseconds |
| Sag | Under-voltage that lasts milliseconds |
| Brownout | Under-voltage that lasts seconds (lights may dim) |
| Blackout | Complete power failure |
| Surge suppressor | A surge suppressor conditions power so that over-voltages don't reach devices. |
| Surge protector | A surge protector protects against over-voltages by switching a device off before an over-voltage can damage it. |
| Line conditioner | A line conditioner modifies the power signal to remove noise and create a smooth alternating current (AC) signal. |
| Standby power supply (SPS) | A standby power supply is an offline device that switches over to provide power when an under-voltage occurs. If the switchover is not fast enough, the computer loses power. |
| Uninterruptible power supply (UPS) | An uninterruptible power supply is an online device that is constantly providing battery power to the computer and being recharged by the wall outlet. |
| Purpose of change | This section includes: Why do you want to make this change? Why is the change needed? Will it improve a current process, save money, or add additional functionality? Does the change align with the organization’s current mission and strategy? |
| Scope of change | What exactly do you want to change? What are the desired outcomes or deliverables? Will you need to request funding to cover new hardware or software? What about man-hours? |
| Risk analysis | What is likely to go wrong if we implement these changes? Are the risks worth it? |
| Backout plan | specifies how you will return affected systems to their original states if your implementation fails. |
| Radio Frequency Interference (RFI) | is interference on the radio channel used by wireless networking devices. |
| susceptible to RFI. | Wireless networks that use the 2.4 GHz frequency range (801.11b and 802.11g) are |
| Crimper | is used to secure connectors to the ends of network cables. |
| WiFi analyzer | Signal strength Network names Network security settings Network coverage This information is valuable for wireless network documentation, expansion, or troubleshooting. |
| Toner probe | Audio-frequency tone generator (sends a signal into the wire that is being tested). Inductive amplifier probe (provides an audible tone if any signal is detected on the wire being tested). |
| Network tap | A device used to collect data on traffic traveling across a network. The tap is usually installed right into your network cabling. |
| Punch down tool | is used to secure cable wiring to a punch-down block or a patch panel. |
| 3-pronged parts retriever | is used to grasp and retrieve small parts that have fallen into difficult-to-reach areas. |
| Multimeter | A device that tests various electrical properties. For example, AC and DC voltage Current (amps) Resistance (ohms) Capacitance Frequency |
| Power supply tester | used to test output from a PC power supply. The power supply tester has multiple connectors to test the output for each connector type. |
| Cable tester | verifies that a network can carry a signal from one end to the other and that all wires within the connector are in the correct positions. |
| Loopback plug | is used to test network communications by redirecting a signal from the transmit port on a device to the receive port on the same device. |
| Combination ratchet/screwdriver | Bit ends can be replaced with Phillips and flat-head screwdrivers, hex sockets, and torx (star-shaped) bits. The ratcheting handle allows you to drive the screw without repositioning the driver. |
| SOP | standard operating procedure |
| RG-59 | CCTV video systems; short cable lengths (less than 3 meters) are sometimes used for cable TV |
| RG-6 | Cable TV, satellite TV, and broadband cable internet |
Created by:
Kingpowerpuff
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