220-1101 Mobile Devices Flashcards
How do you fix a bad/broken battery
- replace it with a battery from the manufacturer or from an aftermarket vendor
- be careful and deliver to e-waste recycling or disposal site
How do you identify a swollen battery?
- device not resting properly
- screen does not sit flush
- device bezel coming apart
- problems with input devices
What can cause a swollen battery?
over-charging, perhaps due to circuit failure
What is an indicator of poor battery health?
A laptop battery that won’t charge up
What 3 things can cause poor battery health?
- setting that limits how much charge the battery can hold to preserve lifespan
- failing battery (battery has outlived its useful life)
- A/C adapter isn’t charging (aka: improper charging)
How do you troubleshoot poor battery health? (3 steps)
- check settings for charge limiting setting
- remove battery to check A/C adapter
- replace battery with known good battery
What 3 things do you look for when attempting to remove a laptop keyboard?
- screws
- clips
- tiny cable
What are the (5) troubleshooting steps for keyboard issues?
- ensure the system is otherwise running smoothly
- If no keys work, keypad connector may be unseated
- check NUM LOCK
- sicking keys: check for debris or goo
- doesn’t register presses or feels sicky: may have a switch knocked out of place
True/False: Evey laptop has the option to upgrade RAM
False
What benefit comes with adding RAM?
improved performance
How do you upgrade RAM?
- refer to manufacturer’s website to determine compatible RAM
- determine current RAM configuration
- determine where the RAM is located
- press out restraining clips, gently remove the old stick, and insert new stick
- always remove electrical power and take out battery (or refer to documentation if battery is not removable)
What are the advantages and disadvantages of an HDD->SSD migration
it costs more per GB, but is dramatically faster and uses less electricity
What are SSD form factors and their characteristics?
M.2: newer and uses less space
mSATA: in-between M.2 and 2.5 inch in size
2.5in SATA: used in older laptops
What is the mSATA or M.2 drive replacement process?
- most drives are located behind a plate on the bottom
- remove the tiny retaining screw and pop the old drive out
- put the new drive in its place and replace the retaining screw
What is the 2.5 HDD or SSD replacement process?
- Remove HDD bay cover
- Slide old drive out
- Slide new drive in
- Replace cover
Where do you typically find a laptop’s wireless card?
under a hatch on the bottom
What is the benefit to upgrading a laptop’s wireless card?
may upgrade laptop to newer standard
What is the process for replacing a laptop’s wireless card?
- check with the portable manufacturer to get a Wi-Fi card that’s compatible
- avoid ESD
- remove the AC adapter and battery (or refer to documentation if battery is not removable)
- remove the old wifi card
- new card must be connected to motherboard in slot and via antenna connection/power cable
What are the motherboard connection standards for laptop wireless cards and which is newer?
- M.2 (newer)
- Mini-PCIe (older)
What are measurements of physical characteristics that are documented and verified through the use of scanners?
Biometrics
What can be used to match a physical characteristic of a user to a valid user account in order to authenticate?
Biometrics
What includes fingerprint and facial recognition?
Biometrics
When you log in to a portable device using a smart card reader and pin number, you are using what communication technology?
Near-field scanner
Most laptops use what LCD display technology for greater viewing angle and better color quality?
In-plane switching (IPS)
Which LCD display technology displays beautiful colors at slower speeds?
In-plane switching (IPS)
Which LCD display technology is found on older portables?
Twisted nematic (TN)
Which LCD display technology is fastest and offers adequate color?
Twisted nematic (TN)
Which LCD display technology is very uncommon on laptops?
Vertical alignment (VA)
Which LCD display technology falls between IPS and TN for color quality and speed?
Vertical alignment (VA)
Which laptop display technology doesn’t require a backlight, is thinner, has better blacks/contrast than LCD panels, is more expensive and is not as common on portable computers as LCD?
Organic light-emitting diode (OLED)
True/False: mobile display components are the same as desktop displays, except laptop displays may include antennas and camera.
True
Which laptop mobile display component controls the colors
LCD screen
Which laptop mobile display component illuminates the image?
backlight
What backlight do LCDs currently use?
light-emitting diode (LED)
How are most laptop monitors lit?
edge-lit
How do you troubleshoot laptop booting (you hear beeps and drives) but no display?
- Make sure the display is turned on
- If it is a 2-in-1, make sure the screen is properly attached and receiving power
How do you troubleshoot dim display?
- Make sure the brightness is turned up
- Check power saving settings
- May be a failing backlight
If your laptop isn’t displaying an image, what can you do to log in?
Connect to an external monitor
How do you turn on an external monitor in the OS component?
Look for a function key and display settings
How do you troubleshoot a flickering display?
- possibly bad device drivers or applications
- loose connectors
What are the three ways you can troubleshoot laptop disabled auto-rotation?
- you can lock or unlock auto-rotation in settings
- display in control panel
- can manually change rotation in settings/display or possibly FN keys
Where is the Wi-Fi antenna typically located on laptops?
in the display
Where is the camera typically located on laptops?
in the display
What component on a laptop has an indicator light to show when it is operating, but can be disabled by malware, and is therefore a security risk?
Camera/webcam
Where is the microphone usually located on a laptop?
in the display
Which laptop component is a security risk because it has no indicator light?
Microphone
Which component is common with 2 in 1’s, but is becoming more common on laptops?
Touch screen/digitizer
What component detects the finger and signals the OS its location on a grid?
digitizer
Where can you find touch-screen diagnostics on laptops?
hardware troubleshooting menus accessable through the BIOS
Where can you find touch support calibration or reset for Windows?
Mouse applet in the Control Panel
Where is the trackpad applet in Mac OS
system preferences
What is the component in displays that converts AC to DC and may be found in older laptops?
Inverter
What are the advantages and disadvantages of a Matte Display
Advantages: offers a good trade-off between glare reduction and color richness
Disadvantage: washes out in bright light
What are the advantages and disadvantages of a high-gloss Display?
Advantages: sharper contrast, richer colors, and wider viewing angles
Disadvantage: heavy reflections
How do some displays mitigate the heavy reflections in high-gloss displays?
Anti-reflective solutions
Which USB connection method is the industry standard?
Type-C
Which USB connection method is quickly becoming the de facto standard port on Android devices?
Type-C
Which mobile devices connection methods are not keyed?
Type-C and Lightning
Which connection method can support USB 3.1 technology with transfer speeds up to 10 GBps?
Type-C
True/False: Type-C is synonymous with a specific version of USB
False
Which mobile devices connection method is Apple’s proprietary port used for all wired accessories?
Lightning
Which connection method has most iPads switched to?
Type-C
How many pins does the lightning port have?
8-pin
Which program licenses the Lightning port to other manufacturers?
Made for iPhone (MFi)
True/False: Apple devices can detect a true (licensed) Lightning connector?
True
Which wireless technology creates electromagnetic fields when devices are close to each other
Near-field communication (NFC)
How far does NFC work?
typically less than a few inches
Which wireless technology can exchange contact info, small files, and even payment transactions via Apple/Google pay
Near-field communication (NFC)
Which wireless technology is the most common way mobile devices expand their physical capabilities?
Bluetooth
Which wireless technology can connect headsets, mice, keyboards and speakers?
Bluetooth
What is the process for adding a Bluetooth device?
- enable Bluetooth on the mobile device
- power on the other bluetooth device (or make sure bluetooth is on)
- return to mobile device to discover and select the bluetooth device for pairing
- enter the appropriate PIN code
- test connectivity
If you can’t find a bluetooth device to pair it, what may be the issue?
Many devices run with Bluetooth off to conserve battery life
What happens if a Bluetooth device doesn’t have a PIN?
not all devices require PIN code, but requires a different pairing action
What is a small device that shares access to cellular technologies such as 4G, 4G LTE via Wifi, and 5G?
Mobile Hotspot
What is it called when a cellular phone is used as a mobile hotspot?
Tethering
Where is the most likely place to by a Mobile Hotspot?
Cellular providers
What is different between using data on your mobile phone verses tethering?
Many carriers separate out and limit the amount of data that can be used for tethering.
How do you configure a cell phone to be a hotspot?
- enable cellular data connection
- turn on additional hotspot setting that causes the device to broadcast a Wi-Fi network
- optional: configure a password
What is an advanced version of the traditional stylus?
Touch pen
What is Apple’s touch pen called, which only works with iPadOS?
Apple Pencil
What are 2 common use cases for touch pens
handwriting notes and draw artworks
Which features do modern smartphones cameras usually include?
HDR, light compensation, and AI (image processing software)
True/False: higher end and midrange devices often have more than one camera lense
True
What mobile camera technology makes sure you capture faster-moving objects and action shots, as well as slow motion video?
“bursts” of shots
How do mobile cameras edit video on-the-fly, add light-filter effects, cleaning up shots, and even adding special effects?
Using apps
Which mobile accessory offers legacy and modern single and multi-function ports
Docking station
Which connection standards are more common on modern docks?
USB 3.x and Thunderbolt 3 & 4
True/False: docking stations for mobile devices are similar to portable docking stations?
True
What are docking stations for mobile devices most often used for?
tablets and credit card readers
What mobile device accessory provides support for connectors that the laptop lacks like docking stations, but in a smaller more portable format?
Port replicator
What are smaller port replicators known as?
dongles/USB-C dongles
What technology allows a user to connect their charger to a port replicator?
Pass-through charging
True/False: Over time, the terms docking station, port replicator and dongle have become blurred?
True
What is an external device that attaches to a mobile computer or other device, has a power connection, and allows connection to peripherals? Used at work desks.
Docking station
What is an external device that provides connection to peripherals through ports? Good for travelers.
Port Replicator
What device is good for when you don’t need access to a number of ports at once?
USB adapter
What device moves the cursor as you move your fingers over the device?
Touchpad
What term refers to using mouse, touchpad, or finger movements and mouse clicks to perform a function?
Multi-touch gesture
Where do you adjust touchpad settings in windows?
Through the mouse control applet or settings app
What is the most common input device for laptops?
Touchpad
What is the biggest advantage of a touchpad?
fewer moving parts, so they last longer
What is a digitizer or pen tablet enables users to paint, ink, pencil or otherwise draw on a computer?
Drawing pad
What does a drawing pad typically use for input?
stylus or touch pen
How does a drawing pad typically connect?
USB or wireless connection
How do you install a drawing pad?
install drivers, should be included in the box
What configuration options typically exist for drawing pads?
adjust pressure, sensitivity of the stylus, configure buttons and set the portion of the screen to which the tablet can draw
What is a common variation of drawing pads?
signature pads
How do you enable or disable cellular data?
- swipe down from the top of the screen to check for a quick option, labeled with something like Data or Cellular
- alternatively, use the settings app, menu option that says data or cellular
What a is a priority ordered list of other carrier networks and frequencies a device should search for when the device can’t locate its home carrier’s netowrk?
Preferred Roaming List (PRL) updates
How are PRL updates usually handled?
Automatically,
- updated via the phone’s cellular connection (baseband or over-the-air updates)
-firmware updates during normal operating system
-firmware upgrades via synchronization
Preferred Roaming Lists (PRLs) are for what kind of network?
Code Division Multiple Access (CDMA)
What software combines a specialized app on the devices and specialized infrastructure to manage BYOD?
Mobile Device Management (MDM)
What kind of policies inform corporate verses end-user device configuration options?
MDM policies
What is the counterpart to Mobile Device Managment where the organization is concerned just with a specific app or group of apps?
mobile application management (MAM)
In MDM and MAM, what is a collection of configuration and security settings that an administrator has created in order to apply settings to a particular categories of users of devices?
Profile
How are MDM and MAM profiles created?
MDM software or a program such as the Apple Configurator
What data format are profiles?
typically text-based files, usually in eXtensible Markup Language (XML)
How do you configure corporate email on Apple devices?
go through settings app, tap mail, and then tap the accounts options. Tap the add account option.
How do you configure exchange email options on Apple devices?
go through settings app, tap mail, and then tap the accounts options. Tap the add account option. tap the exchange option, type email address, domain, username, password and description
How do you set up corporate email on Android devices?
gmail can talk to other email services for setting up exchange, POP3 or IMAP4 accounts
POP3 port?
110
IMAP4 port?
143
SMTP port?
25
Secure POP3 port?
995
Secure IMAP port?
993
Secure SMTP port (2)?
465 or 587
What is two factor authentication also known as?
Multi-factor authentication
What are the 3 different factors commonly used in two-factor authentication?
- knowledge: something you know
- ownership/possession: something you have
- inherence: something the user is or something they do
What are the less common two-factor authentication methods?
location
temporal (time of day)
How are corporate applications typically installed on mobile devices?
third-party app stores
sideloading Android package (APK)
How is mobile device syncronization typically set up?
- install the app
- enter the e-mail and password
True/False: most mobile device syncronization allow users or administrators the ability to make adjustments, including to sync settings?
True
Which mobile device syncronization system is works well with iOS and iPad OS devices and is a one stop shop for e-mail, messaging and online storage?
iCloud
With mobile device syncronization systems, what data are you typically looking to back up?
- Photos
- Calendar
- Contacts
How will you know if an employee is approaching their mobile device data limit?
The carrier will usually notify the user by e-mail or text message when data is close to limit
What three things will typically happen to a employees cellular connection when an employee exceeds their mobile device data limit?
The carrier may:
- stop cellular data
- throttle speed
- bill user for additional data
How do you prevent employees from exceeding their mobile device data limit (5 ways)?
- configure data hogs like cloud storage apps to use wifi
- monitor data use
- disable cellular data usage
- pay to raise cap
- know your data limits and what happens then they’re exceeded
What would you suspect if the following happened?
- suddenly has terrible call quality on Skype while using cellular, but works fine on Wifi
- employee hasn’t gotten an important email on her device, despite good connection
Mobile device has reached data limit
What is a connection that sends data one bit at a time?
Serial interface
What are examples of a serial interface?
- RS232
- Infrared
- Adapters that convert another port into a serial port
What setting, when on, allows applications to query the location of the device?
Location services
What are low accurracy and high accuracy location methods?
- less accurate (low power) methods: nearby celluar and wifi-networks
- high accuracy (high power) methods: GPS
How do you manage location services to minimize the service’s impact to battery life while maintaining functionality of most apps.
- best solution is to set per-app restrictions. review configuration settings for apps that use location services and disable to ones that don’t need to have immediate location data.
What are 3 common mobile device synchronization services?
Microsoft 365
Google Workspace
iCloud
What is the process for using an active authenticated session with a common service to sign into other services?
Single sign-on (SSO)
What are examples of security measures to use with synchronization services?
- username and password
- encrypt stored data
What is the advantage to data syncronization cloud services?
can update anywhere
What are the disadvantages to data synchronization cloud services?
- no longer fully in control
- limits on type and amount of data that can be stored
What sync issues (4) may you run into?
- partial sync
- authentication issues
- OS version issues
- incorrect configuration settings
How can you identify partial sync and resolve?
Partial sync may cause duplicated messages. A solution is to move to a place with a stronger signal.
Between docking station and port replicator, which is best for professionals who need their work desk while traveling?
Docking Station
Between docking station and port replicator, which is best for travelers who just need to access email and communicate with others?
Port Replicator
What is a feature in cellular phones that enables cell phone companies and government agencies to use the ID or MAC address to pinpoint where a phone is at any given time?
geotracking
What can cause a trail of ghost cursors behind the real cursor as you move it?
an aging display or improperly configured refresh rate
What can cause the cursor on a laptop to move erratically or slowly drift in a steady direction?
track pad damage
What can make working on smartphones and tablets very difficult to work on, along with many laptop and desktop systems?
They are sealed
