What is a wireless pen technology that transmits signals over short distances among cell phones computers and other devices?

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notes made from professor messer online youtube series. these are for latest version of Comptia A+ cert

Terms in this set (71)

Lap Top Battery Types

Lithium Ion or Lithium Ion Polymer: No memory effect and charging the battery diminishes capacity

Most Used component of laptop

Laptop keyboard

Laptop Key Placement

Can be delicate procedure, easily damaged, check with manufactures instructions

SO-DIMM

Small Outline Dual In-Line Memory Module

Laptop Memory

Memory used in laptops and mobile devices often easy to install and replace unless soldered to the system board.

Laptop Memory soldered to system board

no upgrade available, requires full system board replacement

Magnetic Disk

Laptop storage space with traditional spinning drive platters. 2.5 form factors (3.5 inch for desktops

SSD (solid state drive)

-All memory, no moving parts
-Silent, fast access time, less latency
-Better performance

M.2 interface

smaller form factor, No SATA data or power cables, easy to install

Replacing laptop storage

open cover on back, open entire laptop, can be modular,

M.2 Interface replacement

one screw, similar to RAM

Migrating from HDD to SSD

Move from Spinning mechanical drive to solid state
like getting new laptop

Installing an OS on SSD

migrating from HDD to SSD
- move user documents between drives
- install can be applications
- can be time consuming

Image/Clone HDD

migrating from HDD to SSD
- no OS installation required
- moves everything from one to the other

Image/ Clone HDD requirements

Imaging software needed, sometimes included with the SSD, many commercial and open source options
- create Image file
- drive to drive image

802.11 Wireless and Blutooth

Wireless Network connectivity

802.11

- local area network (LAN)
- High Speed
- Internet access

Bluetooth

- Personal Area Network (PAN)
- short range
- Connect Peripherals and other nearby devices

Mini PCIe (express) types

Wireless or wireless personal

Biometrics

the identification of a user based on a physical characteristic, such as a fingerprint, iris, face, voice, or handwriting

Biometric Components

-Software or OS
-also hardware for most options

NFC (near- field Communication)

A short-range wireless communication technology that allows two devices to exchange data by touching or being in very close proximity.
- Common on mobile phones or watches

LCD (liquid crystal display)

technology produces an image by filtering light through a layer of liquid crystal cells

LCD Advantages

lightweight, relatively low power, relatively inexpensive

LCD disadvantages

Black levels are a challenge
Requires separate backlight
Lights difficult to replace

TN LCD (Twisted Nematic)

+ Fast response times (gaming!)
+ Low power draw
- Poor viewing angles - color shifts

IPS LCD (in-plane switching liquid crystal display)

excellent color representation
More expensive than TN LCD

VA LCD (Vertical Alignment)

- good compromise between TN and IPS LCD
- good color Representation
- Slower response than TN

OLED (organic light-emitting diode)

Display technology where an organic compound provides the light for the screen, thus eliminating the need for a backlight or inverter.

OLED advantages

Thinner and lighter screens
flexible and mobile
no backlight
tablets, phones, smart watches

Wi-Fi antennas

Wifi main and Aux, Bluetooth

WiFi antennas characteristics

- wires wrap around laptop screen
- Primary connection
- follow same path as previous wires when replacing

Webcam

A video camera for computers typically used to provide real-time video footage

Microphone

- usually built into laptop display
- not good for non-casual use
- analog or USB microphones can help

Cold Cathode Fluorescent Lamp (CCFL)

An older backlighting technology that uses one or two fluorescent tubes to light a monitor panel.
- older, less common, higher voltage, Thicker

LED - Backlit LCD display

-Backlight is LEDs instead of florescent.
-LEDs around the edge of the screen.
-An array of LEDs behind the screen.
-The latest laptops are LED-backlit.

Additional Components behind LCD

- Inverters - turn DC power to AC power
- Backlight
- florescent lamp/LED

Reason we use Inverters

CCFL backlights require AC power but backlight your laptop is using uses DC power.

Determining backlight failure

- shine flashlight at screen, if information visible problem may not be with backlight
- CCFL problem then just replace inverter
-other problem - replace display

Digitizer

Hybrid device using keyboard and tablet like display

Digitizer characteristics

- can use pen like (stylus) device for input
- High graphic and drawing resolution inputs

Touchscreen digitizer

takes input from finger and convert to digital form. Can use keyboard, stylus or key presses all on same system.

Connecting Mobile devices

Wired and Wireless

USB (Universal Serial Bus)

-Primary wired Connection type
- used for high speed communication
- Used for charging and data transfers

Micro-USB

A smaller version of the regular USB connector. The "B" version is commonly used for tablets, Android cell phones, and other small electronic devices.

Mini-USB

A smaller version of the regular USB connector; it is also smaller than microUSB.

USB-C

-The newest, and most versatile, type of USB connector.
-24-pin double sided USB Connector (used for both hosts and devices)

USB-C Can transmit

-display port
- HDMI
- Thunderbolt

Lightning Connection

- 8 pin digital signal used by Apple devices

Lightning Connector advantages

- High power output for phones and tablets
- can be inserted either way
- simple design

DB-9 Interface

-9 pin connection
- also called DE-9
- commonly used for RS-232 signals

RS-232

The recommended standard (RS) upon which all serial communication takes place on a PC.

DB-9 connector

A type of connector with nine pins that's commonly used in serial communication that conforms to the RS-232 standard.

NFC (Near Field Communication)

Mobile technology that enables short-range wireless communication between mobile devices. Now used for mobile payment technology such as Apple Pay and Google Wallet

Other ways to use NFC

Access device or token as identification card to hold up to a door

Bluetooth

Wireless PAN technology that transmits signals over short distances between cell phones, computers, and other devices

Hotspot

- your own personal wireless router
-extend the cellular data network to all of your devices
- depends on phone type and provider
- may require additional charges and data cost

Different types of Touchpens

-Touch pen Stylus
- capacitive stylus
- Digital Stylus

stylus

allows you to activate interface without touching screen
used for handwriting, notetaking, signatures, and easier to see screen and perform precise functions

Active Stylus / Digital Stylus

Provides more precise usability than capacitive touch pen. includes pressure sensitivity. Must be compatible with tablet or device group. (ie. apple device needs apple stylus)

Drawing Pad

Use an active stylus with external digitizer. best for when using pc without any type of capacitive display or active touch screen to interact with.

Reason to use Drawing pad

get same precise input as active stylus

Trackpad

A touch-sensitive surface on which you slide your fingers to move the on-screen pointer
can be external using batteries or bluetooth and functions can be customized

Enable and disable trackpad

some laptops have function key to enable and disable track pad to avoid mistake inputs or clicks

Headsets

• Hands-free audio - Earphones and microphone
• Wired
• Connects to 3.5mm TRRS connector (Tip-Ring-Ring-Sleeve)
• Wireless - Bluetooth headsets

Apple User Headsets

May use lightning port or bluetooth

Speakers

An output device that allows you to hear voice, music, and other sounds from your computer.
Can be battery powered, wired, or wireless using bluetooth

Camera/webcam

Can be internal or external. external on desktops and internal on laptops
accessible from multimedia application, photo utilities, and video conferencing
- real time communication

docking station

An external device that attaches to a mobile computer or device and contains a power connection and provides connections to peripheral devices.

Reasons to use a docking station

- use external keyboard and mouse
- extend existing laptop interfaces
- avoid cable issues
- add additional functionality
- Desktop adapter cards

Port Replicator

A device used with a laptop. The port replicator remains on the desktop with external devices connected to ports on it. A laptop then needs only one connection to the port replicator to have access to the peripherals. (6)

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What is a wireless PAN technology that transmits signals over short distances among cell phones computers and other devices quizlet?

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