CompTIA A+ Notes

Twisted Pair – Common Cabling

Twisted pair cabling is probably the most common/popular cabling type. The cables are twisted together in order to make sure there is minimal interference between the cables. UTP- Unshielded Twisted Pair STP- Shielded Twisted Pair RJ45- 8 pin/ 8 wire [view]

By: landonrh | Related Lesson: Twisted Pair - Common Cabling | Modified: April 3, 2018

memorizing speeds and modules

Memorize DDR speeds and then double for the DDR2 and DDR3.  Module name: take speed, multiply by 8 and then round up or down. [view]

By: mylee83 | Related Lesson: Overview of Changes 801 vs 901 Part 1 | Modified: April 3, 2018

Display Devices: Screens & Projectors

  One of the most common output devices are the monitors of our computers, otherwise known as display devices. They allow us to see exactly what is going on in our operating system whether it be through a screen or projector. You’ll learn display [view]

By: landonrh | Related Lesson: Display Devices: Screens & Projectors | Modified: April 3, 2018

cores & hyperthreading

eg 2 cores –  physical expensive maybe when 2 cores multi core processors. one chip with 2 cores.  can act as there own processors. hyperthreading one core can share work load. cpu, bios, os, application all must support clock speed –  [view]

By: cbreed | Related Lesson: Cores & Hyperthreading | Modified: April 3, 2018

Output Devices: Printers & Speakers

We have multiple types of printing devices from laser to inkjet and they all have a multitude connection possibilities from cable to WiFi to USB. Regardless they have different setup and configuration requirements, and all will have proprietary OEM s [view]

By: landonrh | Related Lesson: Output Devices: Printers & Speakers | Modified: April 3, 2018

Multimedia Devices

Digital Cameras Connects to computer with USB, micro USB, or firewire. May have SD cards you can take from camera and input it into computer as a storage device. Webcams Some are built in, some are added on  and require additional software. MIDI [view]

By: landonrh | Related Lesson: Multimedia Devices: Digital Cameras, Webcam & MIDI Enabled Devices | Modified: April 3, 2018


Class 1 = 100 mw = 100 meters  class 2 = 2.5 mw = 10 m Class 3 = 1 mw = 1 m [view]

By: danielx14 | Related Lesson: Wireless Bluetooth | Modified: April 3, 2018

Wireless encryption types

Wep=Wired  equivalent privacy STAY AWAY FROM Wpa = WIFI protected access- usesTKIP encryption  Wpa2= WIFI protected access 2 uses AES encryption  [view]

By: danielx14 | Related Lesson: Wireless Encryption Types | Modified: April 3, 2018

Input Devices: Game Pads, Joysticks & Digitizers

Game Pads are a type of input device which is a controller that connects to the computer and has multiple buttons for manipulating specific actions.  They require installation software. Joysticks are a type of gaming pad which is just one stick with [view]

By: landonrh | Related Lesson: Input Devices: Game Pads, Joysticks & Digitizers | Modified: April 3, 2018


The focus is more on the devices, how it connects to a network, how to troubleshoot it when its connectivity is gone Introduce 802.11ac the wireless standards used, like Bluetooth, 802.11b and 802.11g, 24 GHz, has become crowded. 802.11n used both [view]

By: shanthang | Related Lesson: Overview of Changes 801 vs 901 Part 2 | Modified: April 3, 2018

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