Comptia A+ > Chapter 10 - Mobile Devices > Flashcards

Chapter 10 - Mobile Devices Flashcards

(109 cards)

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1
Q

What device class bridges smartphone and tablet form factors and often includes a stylus?

A

Phablet

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2
Q

What is Apple’s tablet line called?

A

iPad (mini, Air, Pro)

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3
Q

Which two mobile operating systems dominate the market?

A

Android and iOS

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4
Q

Which mobile OS is open source, Linux‑based, and owned by Google?

A

Android

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5
Q

What is Apple’s mobile operating system for iPhones?

A

iOS

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6
Q

What storage type do mobile devices use for OS, apps, and data?

A

Flash memory (nonvolatile)

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7
Q

Which removable card commonly expands phone storage?

A

microSD (not on all devices)

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8
Q

Which reversible connector did Apple use before USB‑C?

A

Lightning

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9
Q

Which USB connector do most modern Android phones use?

A

USB Type‑C

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10
Q

What is an eSIM?

A

An embedded digital SIM that replaces a physical SIM card

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11
Q

List common SIM form factors.

A

Mini‑SIM, micro‑SIM, nano‑SIM, and eSIM

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12
Q

What does IMEI identify?

A

The device hardware (phone)

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13
Q

What does IMSI identify?

A

The mobile subscriber on the network (stored on SIM)

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14
Q

What does ICCID identify?

A

The physical SIM card

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15
Q

What is tethering?

A

Sharing a phone’s internet connection over USB, Wi‑Fi, or Bluetooth

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16
Q

What is a mobile hotspot?

A

A device sharing its cellular internet via Wi‑Fi to other devices

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17
Q

What is a public Wi‑Fi hotspot?

A

A public access wireless network (e.g., cafe, airport)

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18
Q

What does Airplane Mode do?

A

Disables radios (cellular, Wi‑Fi, Bluetooth, NFC)

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19
Q

Which two wireless technologies most commonly connect peripherals to phones?

A

Wi‑Fi and Bluetooth

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20
Q

What does NFC enable on phones?

A

Tap‑to‑pay and short‑range data exchange

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21
Q

What frequency band does Bluetooth typically use?

A

2.4 GHz ISM band

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22
Q

What is Bluetooth pairing?

A

The process of securely linking two Bluetooth devices

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23
Q

What is Wi‑Fi Calling?

A

Voice/SMS over Wi‑Fi via the carrier when cellular is weak

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24
Q

Why use a VPN on mobile?

A

Encrypt traffic and access private networks securely

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25
Which email protocol uses port 143 by default and keeps mail on the server?
IMAP
26
Which email protocol uses port 110 by default and downloads mail to the client?
POP3
27
Which protocol sends email and commonly uses port 587 with STARTTLS?
SMTP submission (port 587)
28
Which Microsoft mobile email option syncs mail, contacts, and calendars?
Exchange/ActiveSync
29
What is synchronization in mobile contexts?
Keeping data consistent across devices/accounts
30
What file format packages Android apps?
APK (Android Application Package)
31
What is sideloading on Android?
Installing apps from outside the official store
32
How do you vet a mobile app for legitimacy?
Check developer, reviews, download count, permissions, and history
33
What is jailbreaking (iOS) or rooting (Android)?
Bypassing OS restrictions for root access (high security risk)
34
What is BYOD?
Bring Your Own Device—employees use personal devices for work
35
What is MDM?
Mobile Device Management—centrally manages, secures, and configures devices
36
Name three MDM capabilities.
Remote wipe/lock, policy enforcement, app whitelisting/containerization
37
What is remote wipe?
Erasing device data remotely if lost/stolen
38
What are two biometric unlock methods on phones?
Fingerprint and facial recognition
39
What is full‑device encryption on phones used for?
Protects data at rest if the device is lost or stolen
40
What is Activation Lock on iOS?
Ties device to Apple ID to deter theft; requires credentials after reset
41
What is Android Factory Reset Protection (FRP)?
Requires the prior Google account after a reset to prevent unauthorized use
42
What is a factory reset?
Erases user data and settings, restoring the device to defaults
43
What is a soft reset?
A normal restart of the device
44
How do you close an unresponsive app without rebooting?
Force stop (Android) or Force quit (iOS)
45
What is a docking station for laptops?
A base providing power, ports, and sometimes expansion for desktop‑like use
46
How does a port replicator differ from a dock?
Replicator adds ports; a dock may add power, expansion bays, and features
47
What small memory modules do laptops use?
SODIMMs (Small Outline DIMMs)
48
At what angle are SODIMMs typically inserted?
About 45 degrees, then pressed down to latch
49
What aligns SODIMMs in the slot?
The keyed notch on the module
50
What physical security slot do many laptops include?
Kensington Security Slot (K‑slot) for cable locks
51
What key toggles hardware functions on laptops?
Fn (Function) key with F1–F12 for brightness, volume, Wi‑Fi, etc
52
A laptop LCD is very dim with a faint image—likely causes on CCFL panels?
Failed inverter or CCFL backlight
53
Do LED‑backlit laptop panels use an inverter?
No; LED panels use a DC backlight driver instead
54
How can you confirm a laptop panel backlight issue?
Test with an external monitor; if OK, suspect panel/backlight/cable
55
A phone battery drains fast—three quick fixes?
Reduce brightness, close/limit background apps, disable unused radios
56
What is a common hardware fix for rapid battery drain?
Replace the aging Li‑ion battery
57
What causes laptop overheating and an easy remedy?
Blocked vents/dust; clean vents and use a hard, flat surface
58
First step when a mobile charging/data port malfunctions?
Power off and clean the port carefully (contact cleaner/soft brush)
59
If a phone’s charging port is physically damaged and out of warranty, what is an option?
Replace the port daughterboard/assembly
60
How do you manually add a hidden SSID on Android?
Settings > Network & internet > Add network; enter SSID, security, password
61
How do you manually add a hidden SSID on iOS?
Settings > Wi‑Fi > Other...; enter SSID, security, password
62
Where to enable tethering on Android?
Settings > Network & internet > Hotspot & tethering (USB/Wi‑Fi/Bluetooth)
63
Where to enable tethering on iPhone?
Settings > Personal Hotspot
64
Which two wireless methods are most common for mobile peripherals (headsets/keyboards)?
Bluetooth and 2.4 GHz RF (dongle) on some laptops
65
What is a digitizer on touchscreens?
Sensor layer converting touch/pen input into digital signals
66
Resistive vs capacitive touch—key difference?
Resistive uses pressure; capacitive senses conductive touch and supports multi‑touch
67
What is GPS used for on mobiles?
Location services, navigation, and geotagging
68
Name two common mobile sensors besides GPS.
Accelerometer and gyroscope
69
What is Wi‑Fi 2.4 GHz vs 5 GHz trade‑off?
2.4 GHz = longer range/more interference; 5 GHz = higher speed/shorter range
70
What is 5G?
Fifth‑generation cellular technology offering higher bandwidth and lower latency than 4G
71
What is USB OTG on Android?
USB On‑The‑Go: allows a phone to act as a USB host for peripherals
72
What should you check first if a phone won’t join Wi‑Fi?
Correct password, security type (WPA2/WPA3), and time/date
73
Why might an OS update fail on mobile?
Weak/intermittent Wi‑Fi, low battery, or insufficient storage
74
What is the final step if updates repeatedly fail?
Back up data and perform a factory reset, then retry
75
What preliminary step is required to back up an iOS device to iCloud?
Connect to Wi‑Fi
76
Two primary iOS backup methods?
iCloud backup or local backup via the Apple Devices app on Mac/PC
77
What is the free iCloud storage tier commonly offered?
5 GB
78
Name two data types excluded from iCloud backups.
Apple Pay info and Touch ID/Face ID settings
79
Which backups can be optionally encrypted?
Local backups to a Mac/PC via Apple Devices app
80
How do you start an iCloud backup manually on iOS?
Settings > [your name] > iCloud > iCloud Backup > Back Up Now
81
What is the security risk of installing unauthorized apps?
They may be malicious or unstable
82
What is application spoofing?
A rogue app masquerading as a legitimate one to steal data or show deceptive ads
83
What is a remote wipe use case?
Lost/stolen device—erase corporate/personal data remotely
84
What is containerization (work profile) on mobile?
Separates corporate apps/data from personal space for policy control
85
What is geofencing in MDM?
Applying policies/actions when a device enters/leaves a defined location
86
What should you verify first if mobile email won’t sync?
Correct account credentials, server settings, and network connectivity
87
What is the first check if a laptop’s touchscreen becomes inaccurate?
Run touchscreen calibration in OS settings
88
What laptop components must be removed before motherboard service?
AC power, battery, external devices; remove adapters/memory and disconnect internal cables
89
Where are laptop memory slots sometimes located?
Under a bottom access panel or beneath the keyboard
90
What immediate steps should you take after liquid exposure on a device?
Power off, disconnect battery/power, dry thoroughly before powering on
91
Where are inverter and CCFL backlight located?
Within the laptop display assembly (CCFL‑based panels)
92
Where is a laptop’s system board located?
In the main chassis (not in the display)
93
What Windows path adds a Bluetooth device?
Windows Settings > Bluetooth & devices > Add device
94
How do you start Bluetooth pairing on iOS?
Settings > Bluetooth, then select the device
95
Which mobile policy lets employees choose from approved devices?
CYOD (Choose Your Own Device)
96
Which corporate policy issues a company‑owned device for work and some personal use?
COPE (Corporate‑Owned, Personally Enabled)
97
What is the primary benefit of a docking station in enterprise security?
Physical stability, cable management, and controlled port access at the desk
98
What must be done before replacing a laptop battery or internal component?
Shut down, unplug AC, and remove the battery (if removable)
99
What does a rapid pinkish tint on a CCFL screen indicate?
A failing CCFL backlight tube
100
If an app causes high resource use and sluggish device performance, what is a quick remedy?
Force stop the app and check for updates or uninstall it
101
Which two wireless methods can tether a laptop to a phone’s internet without cables?
Wi‑Fi hotspot and Bluetooth tethering
102
What is the purpose of the Personal Hotspot setting on iPhone?
Enable tethering/hotspot sharing of cellular data
103
Which Windows utility is commonly used to adjust most mobile/laptop settings?
Settings app
104
What should you check if charging is intermittent via USB‑C?
Cable quality, debris in port, and try another charger/port
105
What is the safest way to clean corrosion in a device port?
Disconnect power, remove battery if possible, use electronics contact cleaner and a soft brush
106
What warranty risk comes with rooting/jailbreaking?
Voids warranty and increases exposure to malware/security issues
107
What initial steps reduce battery drain from background apps?
Limit background refresh, disable push for nonessential apps, and review app battery usage
108
Which action helps diagnose display output path on laptops/phones?
Toggle external display mode (Windows+P) or use Display settings/AirPlay
109
What should you ensure before performing a factory reset?
Back up important data and verify account credentials for reactivation
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