Mobile devices I

Front

Which technology should Dion Consulting recommend to allow for the thinnest laptop displays? Options: LCD, IPS, LED, OLED

Back

OLED

Answer explanation

An OLED display works without a backlight because it emits visible light. Thus, it can display deep black levels and be thinner and lighter than a liquid crystal display (LCD). In low ambient light conditions (such as a darker room), an OLED screen can achieve a higher contrast ratio than an LCD, regardless of whether the LCD uses cold cathode fluorescent lamps or an LED backlight. An in-plane switching (IPS) LCD panel uses technology designed to resolve the quality issues inherent in TN panel technology, including strong viewing angle dependence and low-quality color reproduction. A liquid crystal display (LCD) panel is a type of display technology where the image is made up of liquid crystal cells controlled using electrical charges. The LCD panel is backlight by a cold cathode fluorescent (CCFL) bulb. LCD panels are used on laptops and have replaced CRT monitors as the main type of computer display screen for desktops, as well. A light-emitting diode (LED) display is an LCD panel that uses a LED backlight instead of a CCFL backlight to provide its light source.

Front

Which of the following locations are you likely to find the antenna wires located within a laptop or mobile device?
- Located under the keyboard
- Laying on top of the battery
- Connected externally via USB
- Positioned around the display panel

Back

Positioned around the display panel

Answer explanation

The antenna wires for the wireless cards and cellular radios are usually routed around the screen within the casing of the laptop or mobile device. The antenna connections can be tricky to install/remove and are delicate. When updating or replacing a wireless or cellular card, the technician must be careful to reconnect the antenna wires and reinstall them in the proper location. External antennas are available only when connected to an external wireless card.

Front

Which of the following synchronization methods does NOT work with Android devices?
Office 365,
Google Workspace,
iTunes,
Flickr

Back

iTunes

Answer explanation

Android can not use iTunes to perform synchronization functions. The iTunes application only works with Apple devices, such as iPhones and iPads. Android devices can use Google Workspace with Gmail to sync emails and contacts. Android devices can also use Office 365 to sync emails, contacts, and other files if you are a Microsoft subscriber. Android devices can use Flickr to sync photos.

Front

Which wireless technology do contactless mobile payment systems like Apple Pay rely upon? Options: Wi-Fi, NFC, Bluetooth, Infrared

Back

NFC

Answer explanation

NFC, or near-field communication, is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm of each other. This is commonly used for contactless payment systems, transferring contacts, or transferring a file from one device to another. Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances using UHF radio waves in the industrial, scientific, and medical radio bands from 2.402 GHz to 2.480 GHz and building a personal area network (PAN). Bluetooth is commonly used when connecting wireless devices like mice, trackpads, headphones, and other devices. Infrared (IR) was a wireless networking standard supporting speeds up to about 4 Mbps with a direct line of sight for communications. Infrared sensors are used in mobile devices and with IR blasters to control appliances. While infrared (IR) used to be commonly used to connect wireless mice and keyboards to a laptop in the 1990s, it has fallen out of favor in the last 10-15 years since Bluetooth is more reliable and does not require a direct line of sight between the device and the laptop. Wi-Fi is the IEEE 802.11 standard for wireless networking based on spread spectrum radio transmission in the 2.4 GHz and 5 GHz bands. The standard has six main iterations (a, b, g, n, ac, and ax), describing different modulation techniques, supported distances, and data rates.

Front

Which mail protocol should be configured to allow employees to receive their mail and maintain the read/unread status across all devices? Options: SMTP, HTTPS, POP3, IMAP

Back

IMAP

Answer explanation

ou should configure IMAP because it will leave the email on the server and allow for synchronizing the mail to all devices, including each email's read state. If you configure POP3, the mail is downloaded to the device and removed the mail from the server's mailbox by default. SMTP is used to send emails, not receive them. HTTPS is used for web browsing, not for receiving emails. The post office protocol (POP3) is a TCP/IP application protocol providing a means for a client to access email messages stored in a mailbox on a remote server over port 110. The server usually deletes messages once the client has downloaded them. The internet message access protocol (IMAP) is a TCP/IP application protocol that provides a means for a client to access email messages stored in a mailbox on a remote server using TCP port number 143. Unlike POP3, messages persist on the server after the client has downloaded them. IMAP also supports mailbox management functions, such as creating subfolders and access to the same mailbox by more than one client at the same time. The simple mail transfer protocol (SMTP) is the protocol used to send mail between hosts on the Internet using TCP port 25. The hypertext transfer protocol secure (HTTPS) is a secure protocol used to provide web content to browsers using SSL/TLS encryption over port 443.

Front

Which cellular technology is comprised of HSPA+ and EV-DO to provide higher data speeds than previous cellular data protocols?

Back

3G

Answer explanation

3G cellular technology is made up of two different technologies: HSPA+ and EV-DO. HSPA+ (Evolved High-Speed Packet Access) is a 3G standard used for GSM cellular networks and can support up to a theoretical download speed of 168 Mbps and a theoretical upload speed of 34 Mbps. In the real world, though, HSPA+ normally reaches speeds around 20 Mbps. EV-DO (Evolution-Data Optimized) is a 3G standard used for CDMA cellular networks and can support up to 3.1 Mbps downloads. 4G cellular technology is made up of LTE and LTA-A. Long Term Evolution (LTE) is a packet data communications specification providing an upgrade path for both GSM and CDMA2000 cellular networks. LTE has a theoretical speed of 150 Mbps and a real-world speed of around 20 Mbps. LTE Advanced (LTE-A) has a theoretical speed of 300 Mbps and a real-world speed of around 40 Mbps. 5G cellular technology is made up of three different types: low-band, mid-band, and high-band mmWave technology. Low-band 5G reaches an average speed of 55 Mbps with a theoretical speed of 150 Mbps. Mid-band 5G reaches an average speed of 150 Mbps with a theoretical speed of 1.5 Gbps. High-band 5G reaches an average speed of 3 Gbps with a theoretical speed of up to 70 Gbps.

Front

Which mail protocol should be configured to allow employees to send their mail from mobile devices? Options: IMAP, POP3, HTTPS, SMTP

Back

SMTP

Answer explanation

You should configure SMTP since it is the only protocol used to send emails. POP3 and IMAP are used to receive emails. HTTPS is used for web browsing, not for receiving emails. The post office protocol (POP3) is a TCP/IP application protocol providing a means for a client to access email messages stored in a mailbox on a remote server over port 110. The server usually deletes messages once the client has downloaded them. The internet message access protocol (IMAP) is a TCP/IP application protocol that provides a means for a client to access email messages stored in a mailbox on a remote server using TCP port number 143. Unlike POP3, messages persist on the server after the client has downloaded them. IMAP also supports mailbox management functions, such as creating subfolders and access to the same mailbox by more than one client at the same time. The simple mail transfer protocol (SMTP) is the protocol used to send mail between hosts on the Internet using TCP port 25. The hypertext transfer protocol secure (HTTPS) is a secure protocol used to provide web content to browsers using SSL/TLS encryption over port 443.

Front

Which devices have most of the same functionality as a personal computer but can be operated with a single hand? Options: Smartwatch, Tablet, Laptop, Smartphone

Back

Smartphone

Answer explanation

A smartphone is a device with roughly the same functionality as a personal computer operated with a single hand. Most smartphones have a screen size between 4.5" and 5.7". Leading smartphones provide high-resolution screens. Smartphones have fast multicore CPUs, anywhere between 2 and 6 GB system memory, and 16 GB+ flash memory storage. They come with premium front and back digital cameras, input sensors like accelerometers, and Global Positioning System (GPS) chips. They can establish network links using Wi-Fi and a cellular data plan. A high-end smartwatch (for example, an Apple Watch) will allow the user to see their notifications, chat activity, and even make phone calls. A mid-range or low-end smartwatch can still have the ability to read your chat and notifications, but you may be unable to make phone calls from it. A smartwatch is not a replacement for a laptop or desktop, but a high-end smartphone can be.

Front

What should Tim do next to ensure the stolen device's data remains confidential and inaccessible to the thief? Options: Identify the IP address of the smartphone, Reset the device's password, Perform a remote wipe of the device, Remotely encrypt the device

Back

Perform a remote wipe of the device

Answer explanation

To ensure the data remains confidential and is not accessed by the thief, Tim should perform a remote wipe of the device from the MDM. This will ensure any corporate data is erased before anyone accesses it. Additionally, Tim could reset the device's password, but if the thief can guess or crack the password, they would have access to the data. Identifying the smartphone's IP address is not a useful step in protecting the data on the device. Additionally, devices should be encrypted BEFORE they are lost or stolen, not after. Therefore, the option to remotely encrypt the device is provided as a wrong answer and a distractor.

Front

What describes how many times the image on the monitor changes per second?

Back

Refresh rate

Answer explanation

Refresh rate is defined by the vertical scan frequency of a monitor and how many times in one second an image can be redrawn on the screen. LCD monitors have a fixed refresh rate based on the specifications of their panel. Generally, a monitor is rated with a refresh rate of 60 Hz, 72 Hz, or 120 Hz, with the higher refresh rate being considered better quality and easier on the user's eyes. For high-performance gaming systems, a 120 Hz monitor is desired for smoother motion and graphics. The aspect ratio is defined as the ratio of width to height in a display. The frame rate is defined as the number of times the image in a video stream changes per second as expressed in Hertz (Hz) or Frames per Second (fps). The yaw rate is a made-up term for the exam and is used as a distractor in this question. The resolution is the measure of the number of picture elements (pixels) that an imaging device can use to sample or display the image as measured in pixels per inch (PPI).