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professor messer a+ 201-1101 > Section 1: Mobile Devices > Flashcards

Section 1: Mobile Devices Flashcards

1
Q

1.1 - Laptop Hardware

Lap top Batteries.

A
  • The power source (battery) when plugged. May be easily replaced or require a teardown. 5 mins vs 1 hr
  • Lithium-Ion (Li-ion) and Lithium-Ion polymer (LiPo) are common batteries: No memory effect. Charging the battery diminished capacity.
  • Different form factor for each laptop: Battery types and styles can vary. Battery technology is changing constantly
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2
Q

1.1 - Laptop Hardware

Laptop keyboard

A
  • The most-used component of the laptop: Can be easy to replace. A few screws and a single ribbon cable involved. May not always be this simple.
  • Or connect an external USB keyboard. Not very portable.
  • Due to less space on keyboard, extra function keys are used and the layout of the keyboard is adjusted.
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3
Q

1.1 - Laptop Hardware

Laptop keys

A
  • Some repairs might require the removal or replacement of a key cap. Delicate procedure.
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4
Q

1.1 - Laptop Hardware

Laptop memory

A
  • Small Outline Dual In-line Memory Module (SO-DIMM) is used in laptops and mobile devices for additional memory.
  • Memory used in laptops and mobile devices: Often easy to install and replace.
  • Some laptop memory is soldered to the system board. No upgrade available. Requires a full system board replacement
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5
Q

1.1 - Laptop Hardware

Laptop storage

A
  • Magnetic disk: Traditional spinning drive platters. 2.5 form factors (3.5 inch for desktop)
  • SSD (Solid-state drive): Spinning hardrive with static connection. All memory, no moving parts. Silent, fast access time, less latency. 2.5 inch form factors
  • SSD M.2 (M stands for module): Smaller form factor. No SATA data or power cables. Easy to install and replace.
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6
Q

1.1 - Laptop Hardware

Replacing laptop storage

A
  • All internal. Open a cover on the back / open the entire laptop to gain access to the storage area.
  • Can be very modular. Two screws and the drive slides out.
  • M.2 drives are even easier. One screw. Similar to RAM installation.
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7
Q

1.1 - Laptop Hardware

Migrating from HDD to SSD

A
  1. An impressive upgrade: Move from spinning mechanical drive to solid state memory. It’s almost like getting a new laptop.
  2. Install an OS on the SSD: Move user documents between drives. Install required applications. Can be time consuming.
  3. Image/clone the HDD: No OS installation required. Move everything from one to the other.
  4. Imaging software needed. Sometimes inculded with the SSD.
  5. Create an image files. One drive at a time.
  6. Drive-to-drive image: Image directly from one drive to the other.
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8
Q

1.1 - Laptop Hardware

802.11 wireless and bluetooth

A
  • Wirelss network connectivity: Connect without wires.
  • 802.11: Local area network (LAN). High speed. Internet access.
  • Bluetooth: Personal area network (PAN). Short range. Connect peripherals and other nearby services.
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9
Q

1.1 - Laptop Hardware

Biometrics

A
  • Sign in or unlock your laptop with a fingerprint reader or face recognition.
  • Requires additional configuration in the OS. Hardware required for most options.
  • Relative secure: Faces and fingerprints are unique.
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10
Q

1.1 - Laptop Hardware

Near-field communication (NFC)

A
  • Short-distance networking: 4 cm or less. Data transfers or authentication.
  • Common on mobile phones and smart watches. Payment method on your wrist.
  • Use it for authentication without typing a password. Used in settings such as hospital workstations, warehouses and manufacturing.
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11
Q

1.2 - Laptop Display

Portable LCD

A
  • Liquid crystal display (LCD): Light shines through crystals.
  • Advantages: Lightweight, relatively low power, relatively inexpensive
  • Disadvantages: Black levels are a challenge. Requires separate backlight. Florescent, LED etc. Lights are difficult to replace.
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12
Q

1.2 - Laptop Display

LCD Technologies

A
  • TN (Twisted Nematic) LCD: Original LCD technology. Fast response times (gaming). Poor viewing angles - color shifts
  • IPS (In Plane Switching) LCD: Excellent color representation. More expensive to produce than TN
  • VA (Vertical Alignment) LCD: Compromise between TN and IPS. Good color representation. Slower response times than TN.
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13
Q

1.2 - Laptop Display

OLED

A
  • Organ Light Emitting Diode (OLED): organic compound emits when receiving an electric current.
  • Thinner and lighter: Flexible and mobile. No glass needed.
  • No backlight: Organic compound provides the light.
  • Found in tablets, phones, smart watches. Very accurate color representation. More expensive than LCD
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14
Q

1.2 - Laptop Display

Wifi antennas

A
  • Multiple antennas: Wifi main and aux. Bluetooth.
  • Antenna wires wrap around the laptop screen. It’s up high.
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15
Q

1.2 - Laptop Display

Webcam

A
  • Video capture: Built-in camera and microphone
  • Usually includes both audio and video. Specializes drivers and software.
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16
Q

1.2 - Laptop Display

Microphone

A
  • Built into the laptop display. Useful for video calls
  • Not good for non-causal use. Analog or USB microphones can help
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17
Q

1.2 - Laptop Display

Flourescent vs LED backlighting

A
  • CCFL - Cold Cathode Fluorescent Lamp: Higher voltage and power needed. Added thickness to the display. No longer a common backlight. Older laptops will uses these.
  • LED-backlit LCD display: Backlight is LEDs instead of flourescent LCD around the edge of the screen An array of LEDs behind the screen The latest laptops are LED-backlit.
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18
Q

1.2 - Laptop Display

Backlight and inverter

A
  • LCD displays need a backlight: Florescent lamp/ LED to LCD display to your eyes.
  • Some laptops have inverters. Turn DC (from laptop) to AC (in backlight)
  • Verify backlight: Look closely .Use a flashlight.
  • May need to replace the LCD inverter or display. Choose carefully.
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19
Q

1.2 - Laptop Hardware

Digitizer

A
  • Use a pen-like device as input: Stylus input. Useful for graphical input
  • Used commonly on laptop / tablets or hypbrid devices.
  • Converts analog to digitized input for devices.
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20
Q

1.2 - LCD Display

Touchscreen

A
  • Merge laptop and tablet input: Digitizer responds to touch. No keyboard required, but often still available.
  • Many options for input: Use the best one for the job.
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21
Q

1.3 - Connecting Mobile Devices

Connecting mobile devices

A
  • Phones and tablets: many different ways to connect
  • Wired and wireless connectivity: standards and options change through the years
  • Used for synchronization, connectivity, backup, and identification: sometimes simultaneously
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22
Q

1.3 - Connecting Mobile Devices

USB

A
  • Universal Serial Bus: High-speed wired communication. Used for charging and data transfers
  • Micro-USB: A smaller USB connection. Common worldwide.
  • Older Devices may use Mini-USB: slightly larger
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23
Q

1.3 - Connecting Mobile Devices

USB-C

A
  • 24-pin double-sided USB connector: Used for both hosts and devices
  • Acts as a USB 2.0/3.0/3.1/3.4 connection: Different signals can use the same connector
  • Can transmit other signals: DisplayPort, HDMI, Thunderbolt
24
Q

1.3 - Connecting Mobile Devices

Lightning

A
  • Apple proprietary: 8-pin digital signals. iPhone and iPad devices
  • Some advantages over Micro-USB: Higher power output for phones and tablets. Can be inserted either way. Simple design. Charges devices faster.
25
Q

1.3 - Connecting Mobile Devices

Serial interfaces

A
  • DB-9: Also called DE-9.
  • Commonly used for RS-232 signals: Recommended standard 232. An industry standard 1969
  • Serial communications standard: Traditionally used for modem connections.
  • Now used as a configuration port: Switches, routers, firewalls etc. Use a USB to DB-9 convertor cable.
26
Q

1.3 - Connecting Mobile Devices

NFC

A
  • Near Fielc Communication: Send small amounts of data wirelessly over a limited area
  • Built into your phone: Payment systems, transportation, in-person information exchange
  • Acces token, identity “card”: Short range with encryption support
27
Q

1.3 - Connecting Mobile Devices

Bluetooth

A
  • High speed communication over short distances: PAN (Personal Area Network)
  • Connects our mobile devices: Smartphones, tethering, headsets and headphones, health monitors, automobile and phone integration, smartwatches, external speakers.
28
Q

1.3 - Connecting Mobile Devices

Hotspot

A
  • Turn your phone into a WIFI hotspot: Your own personal wireless router. Extend the cellular data network to all of your devices
  • Dependent on phone type and provider: May require additional charges and data costs.
29
Q

1.3 - Mobile Device Accessories

Touch pens

A
  • Touchscreen pen/ touch screen stylus/ capacity stylus: activate the interface without actually touching it.
  • Handwriting: Note taking, signatures
  • Precise selection: Easier to see the screen
30
Q

1.3 - Mobile Device Accessories

Active stylus

A
  • Digital stylus: a more advances writing tool. For artists.
  • The stylus communicats directly to the device: Pressure sensitivity, programmable buttons, etc.
  • Must be compatible with tablet: e.g., Apple iPad uses an Apple pencil
31
Q

1.3 - Mobile Device Accessories

Drawing pad

A
  • Use an active stylus with an external digitizer: Very precise input.
  • Third-part device: Support across many operating systems
32
Q

1.3 - Mobile Device Accessories

Trackpad

A
  • Replace the mouse: Useful in tight working areas. Common on laptops.
  • External options: Battery powered. Blutooth connected.
  • Drag and tap: Or use multiple finger input for right-clicking, zooming, and window control
  • Enable and disable: Avoid inadvertent mouse clicks and movement using function key
33
Q

1.3 - Mobile Device Accessories

Headsets

A
  • Hands-free audio: Earphones and microphone
  • Wired: USB connections are common laptops. Connects to 3.5 mm TRRS (tip-ring-ring-sleeve) connector. Analog audio jack. iPhone can use lighning port.
  • Wireles: Bluetooth headsets.
34
Q

1.3 - Mobile Device Accessories

Speakers

A
  • Mobile Audio: battery powered
  • Wireless connection: Bluetooth link
  • Stero sound: small package
35
Q

1.3 - Mobile Device Accessories

Camera / webcam

A
  • Internal or external : Commonly external on desktops, internal on laptops/tablets/phones
  • Accessible from multimedia applications, photo utilities, and video conferencing: Real-time video communication
36
Q

1.3 - Mobile Device Accessories

Docking Station

A
  • Docking station: Use external keyboard and mouse. Extend existing lapton interfaces. Add addition functionality. Desktop adopter cards. Avoid cable issues.
37
Q

1.3 - Mobile Device Accessories

Port replicator

A
  • Port replicator: Similar to a docking station. Does not commonly have an expansion card option. Usually connects via USB.
38
Q

1.4 - Cellular Standards

Cellular networks

A
  • Mobile devices: “cell” phones
  • Separate land into “cells”: Antenna coverages a cell with certain frequencies
  • 2G networks: GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access)
  • Poor data support: Originally used circuit-switching. Minor upgrades for some packet-switching.
39
Q

1.4 - Cellular Standards

GSM

A
  • Global System for Mobile Communications: Mobile networking standard
  • 90% of the market: Originally an EU standard. Worldwid coverage.
  • Used by AT&T and T-mobile in the US: Move your SIM card (Subscriber Identity Module) from phone to phone.
  • Original GSM standard used multiplexing: Everyone gets a little slice of time.
40
Q

1.4 - Cellular Standards

CDMA

A
  • Code Division Multiple Access: Everyone communicates at the same time. Each call uses a different code. The codes are used to filter each call on the receiving side.
  • Used by Verizon and Sprint: Handsets are controlled by the network provider. Not much adoption elsewhere.
41
Q

1.4 - Cellular Standards

3G Technology

A
  • 3rd Generation: Introduced in 1998
  • Upgraded data connectivity over 2G: Incremental 3G updates improved speeds. Usually several megabits per second.
  • Bandwidth improvement allowed new functionality: GPS, Mobile television, Videon on Demand.
42
Q

1.4 - Cellular Standards

4G and LTE

A
  • Long Term Evolution (LTE): A “4G” technology. Converged standard (GSM and CDMA providers). Based on GSM and EDGE (Enhanced Data Rates for GSM Evolution). Standard supports download rates of 150 Mbit/s
  • LTE Advanced (LTE-A): Standard supports download of 300 Mbit/s
43
Q

1.4 - Cellular Standards

5G

A
  • Fifth generation cellular networking: Launched worldwide in 2020
  • Significant peformance improvements: At higher frequencies. Eventuallay 10 gigabits per second. Slowe speeds from 100-900 Mbit/s
  • Significant IoT impact: Bandwidth becomes less of a constraint. Larger data transfers. Faster monitoring and notification. Additional cloud processing.
44
Q

1.4 - Cellular Standards

Updates

A
  • PRL updates: Preferred Roaming List. CDMA networks (verizon, Sprint)
  • Allows your phone to connect to the right tower ( Can be updated over the air)
45
Q

1.4 - Cellular Standards

Hotspot

A
  • Turn your phone into WIFI hotspot: Your own wireless route. Extend the cellular data network to all of your devices.
  • Dependent on phone type and provider: May require additional charges and data costs.
46
Q

1.4 - Mobile Device Connectivity

Bluetooth pairing

A
  • Connect a Bluetooth device: Built-in security. Use or verify PIN
  • Pair the devices one time: Future connections should be automatic
  • Check with the manufacturer: May prefer a specific sequence. Discoverable mode isn’t alway obvious.
47
Q

1.4 - Mobile Device Connectivity

Bluetooth pairing process

A
  • Enable Bluetooh on both devices: Android and iOS: Settings / Bluetooth
  • Set devices to discoverable mode: May require key sequence on Bluetooth device.
  • Select discovered device: Many devices may appear
  • Enter or confirm PIN: Should be the same on both devices.
  • Test connectivityL Devices should now communicate.
48
Q

1.4 - Mobile Device Connectivity

GPS (Global Positioning System)

A
  • Created by the US Department of Defense: Over 30 satellites currently in orbit
  • Precise navigation: Need to see at least 4 satellites.
  • Determines location based on timing difference: longitude, latitude, altitude
  • Mobile device location services and geotracking: Maps, directions. Determine physical location based on GPS, WiFi and cellular towers.
49
Q

1.4 - Mobile Device Connectivity

MDM (Mobile Device Management)

A
  • Manage company-owned and user-owned mobile devices: BYOD - Bring Your Own Device.
  • Centralized management of the mobile devices: Specialized functionality.
  • Set policies on apps, data, camera, etc.: Control the remote devie, the entire device or a “partition”
  • Manage access control: Force screen locks and PINs on these single user devices.
50
Q

1.4 - Mobile Device Connectivity

MDM configurations

A
  • Corporate email configuration: User does not need to configure anything. The MDM makes the changes on the device. Account details, server address, communication method.
  • Two-factor authentication: Require specific authentication types. Biometrics, pseudo-random authentication app.
  • Corporate applications: Allow or restrict app installation. Prevent unauthorized app usage.
51
Q

1.4 - Mobile Device Configurations

Configuring a mobile device

A
  • Many settings are preconfigured: Telephone / text messaging
  • Email: Everyone handles email services differently. Corporate email configuration can vary.
  • Data synchronization: Based on data rate and speeds. Important for backup and recovery.
52
Q

1.4 - Mobile Device Configurations

Microsoft 365

A
  • Outlook, Exchange: Microsoft’s email service. Usually the same hotmail and Outlook.com
  • Authenticate to Microsoft 365: Username, password
  • Select the items to synchronize: Changes in Outlook will appear on the mobile device.
  • Same process for Google Workspace: Formerly known as a G suite.
53
Q

1.4 - Mobile Device Configurations

iCloud

A
  • Integrate into iOS and iPadOS: Provide an iCloud username and password.
  • Select synchronization options: Extensive customization
  • Synchronize to macOS: Use your desktop, laptop, or mobile device.
54
Q

1.4 - Mobile Device Configurations

Synchronizing data

A
  • Data types: mail, pictures/music/video, calendar, contacts.
  • Data caps and transfer costs: cellular vs 802.11. Enable or disable network connections. Control the use of cellular downloads.
55
Q
A

professor messer a+ 201-1101 (4 decks)

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