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Welcome to ExamNotes by CertBlaster! This session covers A+ Exam 220-1001 sub-objective 1.4. Here we will examine the characteristics of several mobile devices.
Tablets are a class of devices that are usually connected with other devices using Wi-Fi, Bluetooth, or NFC.
Tablet using Wi-Fi, Bluetooth or NFC
A tablet is larger than a smartphone and typically lacks a tactile keyboard and cellular capabilities.
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Smartphones are an evolution of the traditional cell phone and possess the added capability of running mobile applications (also referred to as apps). Based on a larger physical platform (approx. 4”x6”), the combination of apps with a touch sensitive display enable the device to perform additional functions such as taking pictures, accessing social media, and playing games. There are many apps out on the marketplace, allowing you to pretty much do anything on your smartphone. In the image, we see a cyclist using a navigation app which utilizes the smartphone’s built-in GPS.
These are devices that you can wear that are capable of measuring, storing, and transmitting data. Typically, this type of device will use Wi-Fi or Bluetooth. For Wi-Fi connected devices, your devices do not need to be near each other as the Wi-Fi internet connection allows the devices to communicate.
Smart watches are smaller than smartphones but can possess many of the same features depending on the level of communication built in.
Smart watch
Smart watches can accommodate everything from simple interaction to full text and voice communication if equipped for cellular communications.
Taking advantage of Bluetooth and Wi-Fi, fitness monitors monitor your body state and report the data back to the master device. These devices allow you to measure heart rate and activity levels in real time.
Glasses and headsets are a design breakthrough in the wearable technology field. These devices project your smartphone or tablet display to a clear lens or a screen.
Glasses and headsets
Using a built-in microphone, these devices can respond to voice commands using voice recognition technology, allowing you to dictate and send email or text messages along with verbally confirming any command or control input. They can also provide an immersive experience by blocking out all other external stimuli and place you in a virtual environment as shown below.
VR headset with headphones
Physically fitting in the space between smartphones and tablets, phablets are bigger than a smartphone and smaller than a tablet. Phablets make web browsing more manageable and minimize the eye strain associated with smartphones. The display size makes viewing multimedia content easier on the eyes as well.
An e-Reader is a dedicated reading device for e-books. Many e-Readers also allow you to highlight and jot down notes. An e-Reader is not suitable for gaming. Gaming and viewing video content requires a higher frequency refreshing screen which on an e-reader can cause flicker. Gaming and viewing video content requires a TFT display which is not power efficient and adds to the devices weight. In addition, e-Readers have considerably less resources than a tablet.
Kindle e-Reader
The Kindle utilizes its resources for maximum benefit by using E-ink and higher quality display resolutions. Originally possessing black and white displays, current Kindle models have been upgraded to full 32 bit color depth displays. Content is typically stored on the device and storage expansion is possible using smart cards.
Forward-facing and rear-facing smart cameras are typically found in your smartphone or tablet. These cameras are smart in the sense that they incorporate additional features alongside standard picture taking such as anti-jitter image stabilization, smile recognition, and blink recognition.
The foundation of the Global Positioning System (GPS) consists of satellites which are orbiting earth in a fixed position relative to the earth’s surface. This orbit is referred to as a geosynchronous orbit. A minimum of three satellites is used by the GPS module inside your personal device to determine the exact location. The time required to receive the signals from the GPS satellites is measured and triangulated to determine your location.
Reading GPS output on a smartphone
Well, that’s it for 1.4. Make sure you know the content and realize that this section concerns more than knowing how to operate your phone. Good luck on the test!
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