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CompTIA A+ 220-1101 > Mobile Devices > Flashcards

Mobile Devices Flashcards

1
Q

How are AC Adaptors Rated ?

A

The power output of AC adapters, ranging from approximately 65 to 120 watts, is an essential rating to consider when selecting the appropriate adapter for electronic devices

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2
Q

How does the AC adapter typically connect to the laptop

A

The AC adapter commonly connects to the laptop via either a DC jack or a USB port

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3
Q

What type of batteries do laptop computers typically use

A

Laptop computers commonly use removable, rechargeable lithium-ion (Li-ion) and Lithium-Ion polymer (LiPo) batteries for power

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4
Q

What are the recommended storage conditions for a lithium-ion (Li-ion) battery: reduce the charge to what percentage and store at what temperature?

A

The recommended storage conditions for a lithium-ion (Li-ion) battery include reducing the charge to 40% and storing it at below 20°C.

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5
Q

What is a characteristic of lithium-ion (Li-ion) batteries regarding their lifespan and charge capacity as they age?

A

Lithium-ion (Li-ion) batteries typically hold less charge as they age and have a maximum usable life of around 2-3 years.

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6
Q

FRU

A

Field-Replaceable Units

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7
Q

What type of packaging is used for laptop DDRx SDRAM?

A

Laptop DDRx SDRAM is packaged in Small Outline DIMMs (SODIMMs), and a SODIMM slot will only accept a specific type of DDR, which varies depending on the laptop’s specifications.

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8
Q

SO-DIMM

A

Small Outline Dual In-Line Memory Module

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9
Q

What does “migration” entail concerning disk upgrade and replacement, specifically in the context of using backup software?

A

Migration involves utilizing backup software to create an image or clone of the old drive and storing it on USB media as part of the disk upgrade or replacement process.

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10
Q

What is the main distinction of “replacement” regarding disk upgrade and replacement, particularly in relation to data backup?

A

In replacement, only data from the old drive is backed up, contrasting with migration where an image or clone of the old drive is created using backup software.

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11
Q

What is the typical form factor for laptop hard disk drives (HDD)?

A

Laptop hard disk drives (HDD) are usually in the 2.5” form factor, though sometimes the 1.8” form factor is used.

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12
Q

What are the typical z-height dimensions for standard 2.5” laptop hard drives, and what z-height drives might be required for ultraportable laptops?

A

A standard 2.5” drive typically has a z-height of 9.5mm, while an ultraportable laptop might require a 7mm (thin) or 5mm (ultrathin) drive.

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13
Q

What types of connectors do magnetic drives commonly use for data and power?

A

SATA data and power connectors

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14
Q

What are the different interface and connector form factors that an SSD flash storage device can use, and what are the key characteristics of each?

A

An SSD flash storage device can utilize various interface and connector form factors:

  • mSATA: Utilizes the Mini-SATA (mSATA) interface, resembling Mini PCIe cards but not physically compatible with Mini PCIe slots. Operates on the SATA bus with a maximum transfer speed of 6 Gb/s.
  • M.2: Interfaces with the PCI Express bus, offering higher bus speeds than SATA. Available in different lengths such as 42 mm, 60 mm, 80 mm, or 110 mm, with the 80 mm (M.2 2280) length being the most popular for laptop SSDs.
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15
Q

NFC

A

Near-Field Communication

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16
Q

What type of standard adapter card is commonly used to connect internal Field Replaceable Unit (FRU) devices to the motherboard of a laptop?

A

Mini PCI Express (Mini PCIe) card, mSATA, or M.2

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17
Q

LCD technologies

A

Twisted Nematic (TN)
In-Plane Switching (IPS)
Vertical Alignment (VA)

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18
Q

What are the main types of display technologies commonly used in mobile devices?

A

LCD (Liquid Crystal Display)
OLED (Organic Light-Emitting Diode)
AMOLED (Advanced Matrix OLED)

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19
Q

What are the different cellular networking data indicators found on the status bar, and what do they signify in terms of data connection generation and speed?

A
  • G/E or 1X: Represents minimal 2G service levels, with connection speeds of 50–400 Kb/s.
  • 3G: Indicates Universal Mobile Telecommunications Service (UMTS) on GSM or Evolution-Data Optimized (EV-DO) on CDMA networks, with speeds of up to around 3 Mb/s.
  • H/H+: Denotes High Speed Packet Access (HSPA), providing improved “3.75G” data rates on GSM networks, with nominal speeds of up to 42 Mb/s.
  • 4G/4G+: Represents LTE-Advanced, with theoretical maximum downlink speeds of 300 Mb/s, although real-world performance typically ranges from 20–90 Mb/s.
  • 5G: Signifies the latest generation of cellular technology, with real-world speeds ranging from about 100 Mb/s to 500 Mb/s.
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20
Q

What is the term used to describe the process of connecting another device to a smartphone or tablet via USB or Bluetooth in order to share its cellular data connection?

A

Tethering

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21
Q

What term describes the functionality of a smartphone or tablet that allows it to serve as a Wi-Fi access point, enabling other devices to connect to the internet through its cellular data connection?

A

Hotspot

22
Q

What is the maximum range of data transmission facilitated by NFC (Near Field Communication)?

A

a maximum range of up to about 20 cm (8 inches).

23
Q

What term describes a device that enables a user to quickly connect and disconnect peripherals to a laptop or notebook computer?

A

Port Replicator

24
Q

What term is used to describe a device that allows users to connect their laptop or notebook computer to additional peripherals, such as monitors, keyboards, and mice, often providing additional ports and functionality?

A

Docking Station

25
Q

The main differences between tethering and hotspot lie in how they enable internet connectivity for other devices using a smartphone:

A

Tethering:

Connection Method: Tethering involves connecting a laptop or other device directly to the smartphone using a USB cable or via Bluetooth pairing.
Data Sharing: The smartphone’s cellular data connection is shared with the connected device, allowing it to access the internet.
Range: Tethering typically offers a shorter range compared to hotspot, as it relies on the physical connection between the smartphone and the device.
Battery Usage: Tethering may consume less battery power on the smartphone compared to hotspot usage, but it can drain the smartphone’s battery faster than using a hotspot.
Setup: Tethering requires the user to enable the tethering feature on the smartphone and establish a connection with the device via USB or Bluetooth.

Hotspot:

Connection Method: A hotspot turns the smartphone into a portable Wi-Fi access point, allowing other devices to connect to it wirelessly over Wi-Fi.
Data Sharing: The smartphone’s cellular data connection is shared with multiple devices that connect to the hotspot’s Wi-Fi network.
Range: Hotspots typically offer a wider range compared to tethering, allowing multiple devices within a certain range to connect simultaneously.
Battery Usage: Hotspot usage may consume more battery power on the smartphone compared to tethering, especially if multiple devices are connected and using data simultaneously.
Setup: Users can enable the hotspot feature on their smartphones, set a network name (SSID) and password, and then connect their devices to the smartphone’s Wi-Fi network just like they would with any other Wi-Fi network.

In summary, while both tethering and hotspot allow other devices to access the internet using a smartphone’s cellular data connection, tethering involves a direct physical or Bluetooth connection between the smartphone and the device, while hotspot creates a Wi-Fi network that multiple devices can connect to wirelessly. The choice between tethering and hotspot depends on factors such as range, battery usage, and the number of devices needing internet access.

26
Q

What type of peripheral port would you expect to find on a current generation smartphone?

A

USB Type-C

27
Q

MDM

A

Mobile Device Management (MDM)
sets device policies for authentication, feature use (camera and microphone), and connectivity. MDM can also allow device resets and remote wipes

28
Q

MAM

A

Mobile Application Management (MAM)
a strategy used by organizations to manage and secure the applications deployed on mobile devices used by their employees. Unlike Mobile Device Management (MDM), which focuses on managing the entire device, MAM specifically targets the applications and data within those applications.

29
Q

GPS

A

Global Positioning System

30
Q

OLED

A

Organic LED or Advanced matrix OLED (AMOLED)
- the panel does not require a separate backlight
- better contrast ratios and allows the display to be thinner, lighter, and consume less power
- made from plastic with no requirement for a layer of glass
- display can be curved

  • maximum brightness may be lower than with LCDs
  • more susceptible to burn-in, where displaying the same static image for many hours causes the LEDs to retain the image persistently
31
Q

LCD

A

Liquid Crystal Display

32
Q

LCD TN

A

Twisted nematic (TN)
- earliest type of TFT technology
-might still be found in budget displays.
-supports faster response times than other TFT technologies
- Fast response time helps to reduce ghosting and motion trail artifacts when the input source uses a high frame rate.

33
Q

LCD IPS

A

In-plane Switching (IPS)
- main benefit is to deliver better color reproduction at a wider range of viewing angles.
- early and cheaper IPS screens is slightly worse response times
- A high-quality IPS display will usually be the best TFT option for both gaming and graphics/design work
- similar response times to TN while retaining better color reproduction and viewing angles

34
Q

LCD VA

A

Vertical alignment (VA)
- supports a wide color gamut and the best contrast-ratio performance
- viewing angles are generally not quite as good as IPS
- response times are worse than TN
- VA panel more prone to motion blur and ghosting

35
Q

CCFL

A

Cold cathode fluorescent (CCFL)
- Early types of laptop display used a cold cathode fluorescent (CCFL) bulb as a backlight
- The bulb requires AC power, so an inverter component is used to convert from the DC power supplied by the motherboard to the AC power for the bulb
- no longer in mainstream

36
Q

Digitizer

A

Converts analog touch input to digital software instructions

37
Q

Touchpads

A

used for pointer control. Most touchpads now support multitouch and gestures.

38
Q

Trackpad

A
  • used to mean the same thing as touchpad, but it is often used to mean a larger-format device attached as a peripheral.
  • Drawing pad also refers to a large-format touch device attached as a peripheral. These are also called graphics tablets
39
Q

Touch pen

A

or stylus rather than fingers. A stylus allows for more precise control and can be used for handwriting and drawing
- A digitizer may only be compatible with a specific touch pen model or range.

40
Q

Airplane mode

A

Airplane mode disables some or all of the wireless features (cellular data, Wi-Fi, GPS, Bluetooth, and NFC), depending on the device type and model
-On some devices, some services can selectively be re-enabled while still in airplane mode.

41
Q

GSM

A

Global System for Mobile Communication (GSM)
- use a removable subscriber identity module (SIM) card to use an unlocked handset with their chosen network provider
- GSM is adopted internationally and by AT&T and T-Mobile in the United States.

42
Q

CDMA

A

Code Division Multiple Access (CDMA)
- means that the handset is directly managed by the provider and there is no removable SIM card
- providers Sprint and Verizon
- Information that the cellular radio needs to connect to the network is provided as a preferred roaming list (PRL) update. A PRL update can be triggered from the device’s Settings menu or by dialing a special code, such as *228

43
Q

LTE

A

Long Term Evolution (LTE)
- All 4G and 5G cellular data connections require a SIM card
- SIM cards do not require the PRL to be updated manually

44
Q

Bluetooth

A

A wireless connection for accessories is often a better option for mobile devices than a cable
- creates a short-range personal area network (PAN) to share data with a PC, connect to a printer, use a wireless headset, and so on
- To connect via Bluetooth, the Bluetooth radio on each device must be put into discoverable or pairing mode

45
Q

Pairing mode

A

Feature of Bluetooth that establishes connectivity between two devices.
- pairing system should automatically generate a passkey or PIN code when a connection request is received

46
Q

There are many different types of information that users might synchronize.

A

Data types:
Contacts
Calendar
Mail
Pictures
Music
Video
Documents

47
Q

BYOD

A

Bring your own device (BYOD)
- employees are allowed to use a personally owned device to access corporate accounts, apps, and data.

48
Q

EMM

A

Enterprise mobility management (EMM)
- is a class of management software designed to apply security policies to the use of mobile devices and apps in the enterprise
- two main functions of an EMM product suite : MDM and MAM

49
Q

2FA

A

two-factor authentication (2FA)

50
Q

Wireless connectivity mobile devices

A

NFC
Bluetooth
Hotspot

51
Q

Wired connectivity mobile devices

A

USB
USB-C
Lightning
Serial interfaces

52
Q
A

CompTIA A+ 220-1101 (3 decks)

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