1.0 Mobile Devices Flashcards
How close does NFC need to be?
Within 4 cm
A device that can be written and the content will be converted from analog input to digital images on the computer
Digitizer
LCD stand for?
Liquid Crystal Display
Main difference between an LCD and an LED? (2)
LCD don’t produce light
LCD uses a backlight
If display screen light is flickering, dimness, what might be causing this?
Inverter
The inverter converts DC (direct current) to AC (active current)
Notes:
LCD technologies (4)
1) Twisted nematic (TN)
- Very old
- Good response time
- Very little lag, high refresh rate, 240 Hz
- Bad Color
2) Vertical alignment (VA)
- Great color
- Okay response
3) In-plane switching (IPS)
- Great Color
- Good viewing angles
- Little lag
4) Organic light-emitting diode (OLED)
- Light-emitting compound
- There is no need for a backlight
- Contrast ratio better than than LCD
- Highest quality
- Found in smaller devices like phones
Expands the number of ports on a laptop, making it easier to connect multiple devices, similar to the ports found on a desktop
Port replicator
A device that connects to a laptop and provides additional ports, such as USB, HDMI, Ethernet, and audio, allowing you to easily connect multiple peripherals, external displays, and network connections, effectively turning the laptop into a desktop-like workstation
Docking station
Notes:
Connection method types (6)
1) Universal Serial Bus (USB) (Micro - Mini - C)
2) Lightning (Apple)
3) Serial interfaces (Legacy - for router/switch)
4) Near-filed communication (NFC)
5) Bluetooth (mouse, keyboards, headsets)
6) Hotspot
Which of USB is the most popular nowadays?
a) Micro-USB
b) Mini-USB
c) USB-C
c) USB-C
Connection type that is used for payments mostly and must be 4cm within distance
NFC (Near-Field Communication)
Connection type that allows internet sharing from a mobile smartphone to a laptop
Hotspot
MDM stand for?
Mobile device management
Notes:
Cellular Networking Standards (5)
1G
- Deprecated legacy
2G
- Used GSM and CDMA
- GSM (Global System for Mobile
Communications) used by AT&T and T-
Mobile
- CDMA (Code-division multiple access)
used by Sprint (legacy) and Verizon
- Uses a PRL (Preferred Roaming List)
- GSM and CDMA were not compatible
3G
- Faster – Allows additional features such as
mobile internet access, video calls and
mobile TV
4G – (still popular today)
- LTE (Long-Term Evolution)
- Faster than 3G (max 300Mbps down &
75Mbps up)
- No need for GSM or CDMA
- One standard
5G – (most popular today)
- Much faster than 4G, up to 100x faster
- May hit speeds of 20Gbps
- Used to stream large amounts of data
- Low – latency links (short delay / response
time)
Question:
A user reports that after the phone fell he is not able to use the screen to select an of the icons. Which of the following is MOST likely the cause?
a) Digitizer
b) Overheating
c) Malware
d) Stylus
a) Digitizer
The digitizer is what allows the touch screen to work. If that fails the the touch feature will not work.
Question:
An organization has implemented a short-band wireless method to authenticate to the front door of their office building. Which of the following has to be enabled for the mobile device to authenticate?
a) Biometrics
b) NFC
c) Bluetooth
d) Hotspot
b) NFC
NFC can be used to authenticate to devices for things such as making purchases or entering building. It’s used in short range only of about 4CM. Bluetooth is used for longer distance generally up to 30ft.
Question:
A user’s laptop is having screen issues. This screen is able to display images but only when a light shines on the screen. The display seems to be working but it’s very dark. What should the technician do first?
a) Replace the graphics card
b) Replace the screen
c) Have the user use an external display only
d) Ensure the backlight is functioning as expected
d) Ensure the backlight is functioning as expected
When a screen is given issues with the brightness, the technician should first check the backlight to ensure it is functioning. If it is not, the backlight should be replaced.
Question:
An organization would like to remotely manage all mobile phones that are joined to the network. They would like the ability to remotely wipe these devices. Which of the following tools would BEST meet this need?
a) Setting a hotspot
b) Wireless encryption
c) Corporate only email
d) Mobile device management (MDM)
d) Mobile device management (MDM)
Mobile device management (MDM) is a software that allows organizations to remotely control mobile devices. This includes authentication, security updates, management of applications, and even the ability to wipe the devices if needed when loss.
Question:
Which of the following components enables a touchscreen to work on a mobile device?
a) Stylus
b) Digitizer
c) Inverter
d) Keyboard
b) Digitizer
The digitizer is the component on a mobile device that allows the device to accept touch input
Question:
A laptop’s external WebCam software is running, but it shows no image. Which of the following should a technician perform FIRST?
a) Replace it with a built-in WebCam
b) Check the WebCam firmware
c) Disconnect and reconnect the WebCam
d) Reinstall the WebCam software and drivers
c) Disconnect and reconnect the WebCam
Before taking any actions of uninstalling and reinstalling software or device, it would be best to first disconnect and reconnect the WebCam to see if it initializes. If that fails then it would be best to reinstall the WebCam software
Question
A technician has completed the installation of a Bluetooth headset to a mobile device for a company executive. The pairing of the device and the headset seem to work. What should the technician do next?
a) Document the steps taken
b) Test the headset to ensure it works correctly
c) Have the executive signoff that the installation is complete
d) Input the Bluetooth pin
b) Test the headset to ensure it works correctly
Once the pairing of a device has been completed the next step should be to test the device to ensure it works such as playing a song using the headset. This should be done before having to sign off on the job.
Question:
An organization would like users to not use any public Wi-Fi when using the company’s laptop in public places. All company users have company-issued cell phones with mobile data. What should the technician suggest to meet these requirements?
a) Suggest users turn on the hotspot on their mobile phones
b) Have users use satellite internet
c) Recommend no internet access in public
d) Tell the users to only use trusted restaurants public Wi-Fi
a) Suggest users turn on the hotspot on their mobile phones
A hotspot would allow users to connect their laptops to the mobile phones data connection. This video will not be using any public Wi-Fi.
Question:
The technician is upgrading the RAM on a laptop. What type of RAM will he install?
a) DIMM
b) SODIMM
c) SRAM
d) ECC RAM
b) SODIMM
Most laptops generally utilizes a type of memory known as Small Outline Dual In-line Memory Module (SODIMM).
Question:
When replacing a laptop’s screen what should the technician ensure is put back correctly in order for the laptop to function in a corporate network?
a) USB Ports
b) Power Ports
c) Wi-Fi antenna
d) Stylus
c) Wi-Fi antenna
Wi-Fi antennas are routed through a laptops display and placed at the top of the display. When replacing the screen it is important to place back the antenna at the top of the display.
