8. Comptia A+ 1101: Supporting Mobile Devices

This type of falta data connector is secured by a latch. Pop the latch up before trying to remove the cable.

A technician is performing a keyboard replacement and asks for your help. The data cable for the old keyboard will not pull out. How should it be removed?

Airplane mode

A toggle found on mobile devices enabling the user to disable and enable wireless functionality quickly.

The batteries in the keyboard have run down--replaced them.

A user complains that their Bluetooth keyboard, which has worked for the last year, has stopped functioning. What would you suggest is the problem?

biometric authentication

Authentication mechanism that allows a user to perform a biometric scan to operate an entry or access system. Physical characteristics stored as a digital data template can be used to authenticate a user. Typical features used include facial pattern, iris, retina, fingerprint pattern, and signature recognition.

mobile application management (MAM)

Enterprise management function that enables control over apps and storage for mobile devices and other endpoints.

pairing

Feature of Bluetooth that establishes connectivity between tow devices, often by entering a PIN.

data caps

Feature of mobile computing that allows use of a network connection to be limited to avoid incurring additional carrier charges.

location service

Feature of mobile computing that identifies or estimates the device's geographical potion using GPS sn/or network data.

App store

Feature of mobile computing that provides a managed interface for installing third-party software apps.

Vertical Alignment (VA)

Type of TFT display with good viewing angles and excellent contrast ratio.

In-Plane Switching (IPS)

Type of TFT display with the best overall quality, including wide viewing angles, good contrast ratio, and good response times (on premium units).

webcam

Type of digital camera used to stream and record video. There are many types, from devices built into laptops to standalone units. While early devices were only capable of low resolutions, most webcams are now HD-capable.

Organic LED (OLED)

Type of flat panel display where each pixel is implemented as an LED, removing the need for a separate backlight.

Twisted Nematic (TN)

Type of low-cost TFT display with relatively poor viewing angles and contrast ratio, but good response times.

hotspot

Using the cellular data plan of a mobile device to provide internet access to a laptop or PC. The PC can be tethered to the mobile by USB, Bluetooth, or Wi-Fi ( a mobile hotspot).

digital camera

Version of a 35 mm film camera where the film is replaced by light-sensitive diodes and electronic storage media (typically a flash memory card). The sensitivity of the array determines the maximum resolution of the image, measured in megapixels. Most mobile devices are fitted with embedded cameras that can function as both still and video cameras.

Verify that the DDR version of the upgrade module is supported by the motherboard. Take antistatic precautions. Locate the memory slot, which is usually accessed via a panel on the back cover. Move the connector up to 45 degrees and insert the memory card, taking care to align it correctly. Push the card flat again.

What is the process for installing memory in a laptop?

For Apple devices, the Lightning port. For Android, it will be USB-C.

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

Mini-PCIe, mSATA, or M.2.

What type of standard adapter card might be used to connect internal FRU devices to the motherboard of a laptop?

contacts and calendars items.

Which types of data might require mapping between fields when syncing between applications?

A vendor account, such as an Apple, Google, or Samsung account, is required to use the app store.

Why must a vendor account usually be configured on a smartphone?

Batteries lose maximum charge over time. It may be possible to recondition the battery or to use power-saving features, but the only real way to restore maximum battery life is to buy a new battery.

A laptop user reports that they are only getting about two hours of use out of the battery, compared to about three hours when the laptop was first supplied to them. What do you suggest?

Preferred Roaming List (PRL)

Data that allows a CDMA-based handset to connect to nearby cell towers.

mobile application management (MAM) allows an enterprise to create a protected container as a workspace for corporate apps and data and prevent copying to other storage areas.

A company has discovered that an employee has been emailing product design documents to her smartphone and then saving the files to the smartphone's flash drive. Which technology can be deployed to prevent such policy breaches?

Vertical alignment (VA) displays support good viewing angles and high-contrast ratios, which makes them well-suited to displaying slides to an audience. The twisted nematic (TN) type is cheap but does not support wide-angle viewing.

A company is ordering custom-built laptops to supply to its field sales staff for use predominantly as presentation devices. The company can specify the type of panel used and has ruled out IPS and OLED on cost grounds. Which of the remaining mainstream display technologies is best suited to the requirement?

touch screen

A display screen combined with a digitizer that is responsive to touch input.

The user could be touching the touchpad while typing, or vibrations could be affecting the touchpad. Update the driver or reduce the sensitivity/disable touch and tap events.

A laptop user is complaining about typing on their new laptop. They claim that the cursor jumps randomly from place to place. What might be the cause of this?

port replicator

A simple device used to extend the range of ports (for example, USB, DVI, HDMI, Thunderbolt, network and so on) available for a laptop computer when it is used on a desk.

docking station

Advanced type of port replicator designed to provide additional ports (such as network or USB) and functionality (such as expansion slots and drives) to a portable computer when used at a desk.

digitizer

As part of a touch screen assembly, the digitizer is a touch-sensitive layer placed on top of the display panel. The digitizer converts analog touch and gesture events to digital signals that can be interpreted as different types of input.

universal asynchronous receiver/transmitter (UART)

Controller that can send and receive data in an asynchronous serial format.

liquid crystal display (LCD)

Flat-panel display technology where the image is made up of liquid crystal cells with color filters controlled using electrical charges. The display must be illuminated by a backlight.

inverter

Fluorescent lamp backlights require AC power. An inverter component converts DC power from the motherboard to AC. The inverter can fail separately to the backlight.

Just select the provider then enter the email address. If the account is detected, you will be prompted for the password.

How do you configure an autodiscover-enabled email provider on a smartphone?

The graphics adapter is working. The problem must exist either in the cabling to the built-in screen or with a screen component, such as an inverter, backlight, or the display panel itself. Further tests will be required to identify which.

If the laptop can display an image on an external monitor but not on the built-in one, which component do you know is working, and can you definitively say which is faulty?

Touch pen

Input device that can be used with a compatible digitizer/tack pad/drawing tablet for natural input, such as handwriting and sketching.

backlight

LED or fluorescent lamp that illuminates the image on a flat-panel (TFT) screen. If the backlight components fails, only a dim image will be shown.

Global Positioning System (GPS)

Means of determining a receiver's position on earth based on information received from orbital satellites.

Microsoft 365

Mobile/cloud computing office productivity and data storage suite operated by Microsoft.

Google worskpace

Mobile/cloud computing office productivity, and data storage suite operated by Google.

iCloud

Mobile/cloud computing office-productivity and data-storage suite operated by Apple.

Long Term Evolution (LTE)

Packet data communication specification providing an upgrade path for both GSM and CDMA cellular networks. _____ Advanced is designed to provide 4G standard network access.

headset

Peripheral device supporting audio input (microphone) and output (speaker headphones).

battery

Power source for a portable computer, typically a rechargeable Lithium-ion (Li-ion) type. A small coin cell battery is also used in a computer to power CMOS RAM.

Mobile Device Management (MDM)

Process and supporting technologies for tracking, controlling, and securing the organization's mobile infrastructure.

The fixed drive, system memory (RAM), and plug-in wireless card will be the easiest upgradable components to install. If items need repairing, the battery, touchpad and the keyboard should be straightforward to replace if you can obtain compatible parts.

Several laptops need to be replaced in the next fiscal cycle, but that doesn't begin for several months. You want to improve functionality as much as possible by upgrading or replacing components in some of the laptops that are having problems, Which items are most easily replaced in a laptop?

Light Emitting Diode (LED)

Small, low-power lamps used both as diagnostic indicators, the backlight for a TFT display, and (as an organic LED array) in high-quality flat panels.

Trackpad

Sometimes synonymous with touch pad, but also a touch interface provisioned as a peripheral device, often dedicated to use with digital art applications.

Thin Film Transistor (TFT)

Specific display technology used to implement modern flat-panel LCD displays.

two-factor authentication (2FA)

Strong authentication mechanism that requires a user to submit two different types of credentials, such as a fingerprint scan plus PIN. Often, the second credential is transmitted via a second trusted device or account. This is also referred to as 2-step verification.

Indoor Positioning System (IPS)

Technology that can derive a device's location when indoors by triangulating its proximity to radio sources such as Bluetooth beacons or Wi-Fi access points.

On the smartphone, open the Bluetooth page under Settings. This will make the phone discoverable and enable the user to find nearby devices. If the headset is not found automatically, check if there is a button on the headset to make it discoverable.

You are assisting a user with pairing a smartphone to a Bluetooth headset. What step must the user take to start the process?

Near Field Communication (NFC) allow the user to touch the phone to a point-of-sale terminal to authorize payment in conjunction with a wallet app.

You are identifying suitable smartphone modes to issue to field sales staff. The models must be able to use digital payments. What type of sensor must the devices have?

Configuring a hotspot allows the laptop to connect to the smartphone over Wi-Fi. Tethering means connecting the laptop via USB or Bluetooth.

You are writing a knowledge base article for remote sales staff who need to use their smartphones to facilitate internet connectivity for their laptops from out-of-office locations. What distinguishes the hotspot and tethering means of accomplishing this?

Overheating can be a sign that dust and dirt is restricting the necessary airflow wihtin the device, os start by cleaning the ventilation duct with compressed air, and then make sure that the device is getting proper air circulation around the outside of the case, such as by supplying a chiller pad.

You received a user complaint about a laptop being extremely hot to the touch. What actions should you take in response to this issue?