1.0 Mobile Devices Flashcards by Andrew Jensen

1.1 Laptop hardware
* Some laptops are easier to fix than others

– An ongoing learning process

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1.1 Laptop hardware
* Understand the process

– The details will vary between laptop manufacturers

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1.1 Laptop hardware
* Engineered to precise specifications(how easy is the repair?)

– A challenging repair

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1.1 Laptop batteries
* The power source when unplugged
-How easy to replace?
-How much charge?

– May be easily replaced or require a tear down(disassembly)
– Five minutes vs. one hour

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1.1 Laptop batteries
* Lithium-Ion (Li-ion) and Lithium-Ion polymer (LiPo) are common
-Doesn’t have this memory problem with charging
-Effect of charging these batteries

– No “memory effect”
– Charging the battery diminishes capacity

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1.1 Laptop batteries
* Different form factor for each laptop
-What battery type do you need?
-Battery technology is _

– Battery types and styles can vary
– Battery technology is changing constantly

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1.1 Laptop keyboard
* The most-used component of the laptop
- __ to replace
-What parts?
-Is it always the same difficulty to replace?

– Can be easy to replace
– A few screws and a single ribbon cable
– May not always be this simple

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1.1 Laptop keyboard
* Or connect an external USB keyboard
-Portable?

– Not very portable, but works in a pinch

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1.1 Laptop keys
* Check with the manufacturer’s instructions
-What parts are easy to break?

– It’s very easy to accidentally break the key cap
or the components underneath

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1.1 Laptop keys
* Some repairs might require the removal or
replacement of a key cap

– This can be a delicate procedure

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1.1 Laptop memory
* Some laptop memory is soldered to the system board
-Memory upgrade?
-How to get new memory for it?

– No upgrade available
– Requires a full system board replacement

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1.1 Laptop memory
* Small Outline Dual In-line Memory Module (SO-DIMM)
* Memory used in laptops and mobile devices
-Benefits for repair?

– Often easy to install and replace

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1.1 Laptop storage
* Magnetic disk
-What kind of disk
-What form factor(inch)

– Traditional spinning drive platters
– 2.5 form factors (3.5 inch for desktops)

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1.1 Laptop storage
* SSD (Solid-state drive)
-What kind of moving parts?
-Advantages over HDD?
-What form factor(inch)

– All memory, no moving parts
– Silent, fast access time, less latency
– 2.5 inch form factors

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1.1 Laptop storage
* M.2
-Form factor size?
-Doesn’t support these cables
-Installation advantages

– Smaller form factor
– No SATA data or power cables
– Easy to install and replace

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1.1 Replacing laptop storage
* All internal
-How to replace?
-How to replace?

– Open a cover on the back
– Open the entire laptop

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1.1 Replacing laptop storage
* M.2 drives are even easier
-How many screws to replace the drive?

– One screw - similar to RAM installation

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1.1 Replacing laptop storage
* Can be very modular
-How many screws for the laptop?

– Two screws and the drive slides out

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1.1 Migrating from HDD to SSD
* An impressive upgrade
-What improvements?

– Move from spinning mechanical drive to
solid state memory

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1.1 Migrating from HDD to SSD
* Install an OS on the SSD
-What should be moved/installed?
-Disadvatnages?

– Move user documents between drives and Install any required applications
– Can be time consuming

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1.1 Migrating from HDD to SSD
* Image/clone the HDD
-No ___ required?
- Move __ from one to another

– No OS installation required
– Move everything from one to the other

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1.1 Migrating from HDD to SSD
* Imaging software needed
-Sometimes included with the _____
- Many __ and ___ options

– Sometimes included with the SSD
– Many commercial and open source options

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1.1 Migrating from HDD to SSD
* Create an image file - One drive at a time
* Drive-to-drive image
-

– Image directly from one drive to the other

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1.1 802.11 wireless and Bluetooth
* Wireless network connectivity
-Wireless means ___

– Connect without wires

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1.1 802.11 wireless and Bluetooth * 802.11 -What network does 802.11n standard? -Advantages of these networks?

– Local area network (LAN) – High speed, Internet access

1.1 802.11 wireless and Bluetooth * Bluetooth -What's the network it's used called? Range? -What does it connect with?

– Personal area network (PAN) - Short range – Connect peripherals and other nearby devices

1.1 Biometrics * Sign in or unlock your laptop with a fingerprint reader or face recognition

– Something you are

1.1 Biometrics * Requires additional configuration in the OS -What do you require to use biometrics?

– Hardware required for most options

1.1 Biometrics * Relatively secure -Why is it secure?

– Faces and fingerprints are quite unique

1.1 Near-field communication (NFC) * Short-distance networking -How close is it? -What's it used for?

– 4 centimeters or less – Data transfers or authentication

1.1 Near-field communication (NFC) * Common on mobile phones and smart watches -How do people use it?

– Payment method on your wrist

1.1 Near-field communication (NFC) * Use it for authentication without typing a password -Places where it's used?

– Hospital workstations, warehouses, manufacturing

1.2 Portable LCD * Liquid crystal display -What is it?

– Light shines through liquid crystals

1.2 Portable LCD * Advantages -What are their advantages?

– Lightweight, Relatively low power, Relatively inexpensive

1.2 Portable LCD * Disadvantages -What are their disadvantages?

– Black levels are a challenge – Requires separate backlight – Florescent, LED, etc. – Lights are difficult to replace

1.2 LCD technologies * TN (Twisted Nematic) LCD -How old? -Response times, for what? -Disadvantages?

– The original LCD technology – Fast response times (gaming!) – Poor viewing angles - color shifts

1.2 LCD technologies * IPS (In Plane Switching) LCD -Advantages? -Disadvantages?

– Excellent color representation – More expensive to produce than TN

1.2 LCD technologies * VA (Vertical Alignment) LCD -Comparison with TN and IPS? -Advantages? -Disadvantages vs TN

– A good compromise between TN and IPS – Good color representation – Slower response times than TN

1.2 OLED * Organic Light Emitting Diode -When do they emit light?

– Organic compound emits light when receiving an electric current

1.2 OLED * Thinner and lighter -Weight advantages?

– Flexible and mobile - no glass needed

1.2 OLED * No backlight -What provides the backlight?

– The organic compound provides the light

1.2 OLED * Tablets, phones, smart watches -Advantages -Disadvantages vs LCD?

– Very accurate color representation – A bit higher cost than LCD

1.2 Wi-Fi antennas * Antenna wires wrap around the laptop screen -Disadvantages?

– It’s up high

1.2 Wi-Fi antennas * Multiple antennas - Wifi antenna Left ___ and right _____ (laptop)

– Main and Aux / Bluetooth

1.2 Webcam * Video capture - Built-in camera and microphone * Usually includes both audio and video -What do webcams require for use?

– Specialized drivers and software

1.2 Microphone * Not good for non-casual use -What kind of microphones?

– Analog or USB microphones can help

1.2 Microphone * Built-in to the laptop display -Useful for what kind of communication?

– Useful for video calls

1.2 Fluorescent vs. LED backlighting * CCFL - Cold Cathode -What kind of lighting? - Power and voltage? -Display thinness? -Backlight? -Laptops that use them?

– Fluorescent Lamp – Higher voltage and power needed – Added thickness to the display – No longer need a common backlight – Older laptops will use these

1.2 Fluorescent vs. LED backlighting * LED-backlit LCD display -Backlight is what? - ____ around the edge of the screen? - LED's __ the screen - What kind of laptops are LED-backlit?

– Backlight is LEDs instead of florescent – LEDs around the edge of the screen – An array of LEDs behind the screen – The latest laptops are LED-backlit

1.2 Backlight and inverter * LCD displays need a backlight -

– Florescent lamp/LED to LCD display to your eyes

1.2 Backlight and inverter * Some laptops have inverters - Turn DC into AC * Verify backlight -What tool to use to verify?

– Look closely and use a flashlight

1.2 Backlight and inverter * May need to replace the LCD inverter or display -How to choose inverter or display?

– Choose carefully

1.2 Touchscreen * But often still available -What options should you use?

– Many options for input - Use the best one for the job

1.2 Touchscreen * Merge laptop and tablet input -___ responds to touch, no ___ required

– Digitizer responds to touch - No keyboard required

1.3 Connecting mobile devices * Phones and tablets -How many ways to connect?

– Many different ways to connect

1.3 Connecting mobile devices * Wired and wireless connectivity -How do standards and options age?

– Standards and options change through the years

1.3 Connecting mobile devices * Used for synchronization, connectivity, backup, and identification -Can it be done simultaneously?

– Sometimes simultaneously

1.3 USB * Universal Serial Bus - __ speed ___ communication - Used for?

– High-speed wired communication – Used for charging and data transfers

1.3 USB * Micro-USB -Size vs Mini-USB? - Availability?

– A smaller USB connection – Common now worldwide

1.3 USB * Older devices may use Mini-USB -Size vs micro-USB

– Slightly larger

1.3 USB-C * 24-pin double-sided USB connector -What's it used for?

– Used for both hosts and devices

1.3 USB-C * Acts as a USB 2.0/3.0/3.1/4 connection -____ signals can use the same ____

– Different signals can use the same connector

1.3 USB-C * Can transmit other signals -What display interfaces?

– DisplayPort, HDMI, Thunderbolt

1.3 Lightning * Apple proprietary -What ___ pin digital signals? -What devices?

– 8-pin digital signals – iPhone and iPad devices

1.3 Lightning * Some advantages over Micro-USB -higher ____ for phones and tablets -Can be ___ either way - __ design

– Higher power output for phones and tablets – Can be inserted either way – Simpler design

1.3 Serial interfaces * DB-9 - also called DE-9 * Commonly used for RS-232 signals -What does RS-232 stand for? -How old?

– Recommended Standard 232 – An industry standard since 1969

1.3 Serial interfaces * Serial communications standard -What connections is it used for?

– Traditionally used for modem connections

1.3 Serial interfaces * Now used as a configuration port -What devices are used with it? -What converter cable does it use?

– Switches, routers, firewalls, etc – Use a USB to DB-9 converter cable

1.3 NFC * Near Field Communication -How much data does it send over what area?

– Send small amounts of data wirelessly over a limited area

1.3 NFC * Built into your phone -What does it allow you to use?

– Payment systems, transportation,in-person information exchange

1.3 NFC * Access token, identity “card” -___ range, ___ support

– Short range with encryption support

1.3 Bluetooth * High speed communication over short distances -What network does it use?

– PAN (Personal Area Network)

1.3 Bluetooth * Connects our mobile devices -What devices? -Sharing of a mobile device's Internet connection with other connected computers over Bluetooth?

– Smartphones – Headsets and headphones – Health monitors – Automobile and phone integration – Smartwatches – External speakers - Tethering

1.3 Hotspot * Turn your phone into a WiFi(WLAN) hotspot -What does this turn your phone into? -What does this do?

– Your own personal wireless router – Extend the cellular data network to all of your devices

1.3 Hotspot * Dependent on phone type and provider -What is needed to set up a hotspot(depending on provider and phone type?)

– May require additional charges and data costs

1.3 Touch pens * Touchscreen pen / touch screen stylus / capacitive stylus -What does it allow you to do with the interface?

– Activate the interface without actually touching it

1.3 Touch pens * Handwriting -What's it recognize?

– Note taking, signatures

1.3 Touch pens * Precise selection -Precise selection enables what?

– Easier to see the screen

1.3 Active stylus * Digital stylus -What?

– A more advanced writing tool

1.3 Active stylus * The stylus communicates directly to the device -What features?

– Pressure sensitivity, programmable buttons, etc.

1.3 Active stylus * Must be compatible with the tablet -What stylus with what device?

– e.g., Apple iPad uses an Apple Penci

1.3 Drawing pad * Use an active stylus with an external digitizer -What kind of input?

– Very precise input

1.3 Trackpad * Replace the mouse -Use in what areas? -Used by what devices(usually)?

– Useful in tight working areas – Common on laptops

1.3 Trackpad * External options -___ powered - __ connected(what wireless technology?)

– Battery powered – Bluetooth connected

1.3 Trackpad * Drag and tap -What other options to move?

– Or use multiple finger input for right-clicking, zooming, and window control

1.3 Trackpad * Enable and disable -What's it prevent?

– Avoid inadvertent mouse clicks and movements

1.3 Mobile Device Accessories * Hands-free audio - Earphones and microphone * Wired - ___ connections are common on laptops - What's it connect to?( ___ mm connector) - ____ ___ jack -Iphone can use __ port

– USB connections are common on laptops – Connects to 3.5 mm TRRS (tip-ring-ring-sleeve) connector – Analog audio jack – iPhone can use Lightning port

1.3 Mobile Device Accessories * Wireless - Bluetooth headsets

1.3 Speakers * Mobile audio - Battery powered * Wireless connection - Bluetooth link * Stereo sound - Small package

1.3 Camera / webcam * Internal or external * Accessible from multimedia applications, photo utilities, and video conferencing -External on __ , internal on ___ - What kind of communication?

– Commonly external on desktops, internal on laptops/tablets/phones – Real-time video communication

1.3 Docking station * Docking station -Use external __ and __ -What does it extend? -Adds __ ___ -Desktop ___ cards - Avoids ___ issues

– Use external keyboard and mouse – Extend existing laptop interfaces – Add additional functionality – Desktop adapter cards – Avoid cable issues

1.3 Port replicator * Port replicator -Similar to a ___ -Commonly doesn't have this option? -Connects using ___

– Similar to a docking station – Does not commonly have an expansion card option – Usually connects using USB

1.4 Cellular networks * Mobile devices * Separate land into “cells” * 2G networks * Poor data support -Another name for a mobile device phone? -Antenna covers a ___ with certain ___ -GSM stand for? -CDMA stand for? -2G Originally used ___ switching -Minor upgrades for ___ switching

– “Cell” phones – Antenna coverages a cell with certain frequencies – GSM - Global System for Mobile Communications – CDMA - Code Division Multiple Access – Originally used circuit-switching – Minor upgrades for some packet-switching

1.4 GSM * Global System for Mobile Communications 1.4 - Cellular Standards * 90% of the market * Used by AT&T and T-Mobile in the United States * Original GSM standard used multiplexing - ___ networking standard - Originally an ___ standard - __ coverage(global) -Move from one phone to another -How much time does anyone have?

– Mobile networking standard – Originally an EU standard – Worldwide coverage – Move your SIM card (Subscriber Identity Module) from phone to phone – Everyone gets a little slice of time

1.4 CDMA * Code Division Multiple Access * Used by Verizon and Sprint - ___ communicates at ____ - Each call has a different ___ - The codes are used to ___ each call on the receiving end -Handsets are controlled by the ____ -How commonly adopted?

– Everyone communicates at the same time – Each call uses a different code – The codes are used to filter each call on the receiving side – Handsets are controlled by the network provider – Not much adoption elsewhere

1.4 3G technology * 3rd Generation * Upgraded data connectivity over 2G * Bandwidth improvement allowed new functionality -When was it introduced? -Speed? How'd it improve? -Where is it used?

– Introduced in 1998 – Incremental 3G updates improved speeds, and Usually several megabits per second – GPS, Mobile television,Video on demand,Video conferencing

1.4 4G and LTE * Long Term Evolution (LTE) * LTE Advanced (LTE-A) -___ technology(LTE) - Converged standard of what providers?(LTE) - Based on what standard?(LTE) -Standard supports download rates of __ Mbit/s(LTE) -Standard supports download rates of ___ Mbit/s(LTE-A)

– 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 – Standard supports download rates of 300 Mbit/s

1.4 5G * Fifth generation cellular networking -When was it launched? * Significant performance improvements - - - * Significant IoT impact – Bandwidth becomes less ___ – ___ data transfers – ___ monitoring and notification – ______cloud processing

– Launched worldwide in 2020 * – At higher frequencies – Eventually 10 gigabits per second – Slower speeds from 100-900 Mbit/s * -Bandwidth becomes less of a constraint -Larger data transfers -Faster - Additional

1.4 Updates * PRL (Preferred Roaming List) updates – What networks does it update? Hint: Starts with C(Network providers1, network provider 2) * Updates Allow your phone to connect to the right tower –

-CDMA networks (i.e., Verizon, Sprint) -Can be updated over the air (OTA)

1.4 Hotspot * Turn your phone into a WiFi hotspot -Your own personal wireless __ -This allows you to extend your ____ network to all of your devices * Dependent on phone type and provider -

– router – cellular data network - May require additional charges and data costs

1.4 Bluetooth pairing * Connect a Bluetooth device -How do you access the device with the built-in security? * Pair the devices one time – What should Future connections be after pairing? * Check with the manufacturer – May prefer a ___ sequence – _____ mode isn’t always obvious

– Use or verify a PIN * -automatic * -specific -Discoverable

1.4 Bluetooth pairing process * Enable Bluetooth on both devices – Android and iOS: ___ * Set devices to discoverable mode – May require ___ on Bluetooth device * Select discovered device – Many ___ may appear! * Enter or confirm PIN – Should be____ on both devices * Test connectivity – Devices should now ___

-Settings / Bluetooth * -key sequence * -devices -the same -communicate

1.4 GPS (Global Positioning System) * Created by the U.S. Department of Defense – Over __ satellites currently in orbit * Precise navigation - Need to see at least 4 satellites * Determines location based on timing differences – Location variables such as :___, ___, ___ * Mobile device location services and geotracking – What does it allow you to use? – Determine physical location based on __,__ and __

-30 * -Longitude, latitude, altitude * -Maps, directions -GPS, WiFi, and cellular towers

1.4 MDM (Mobile Device Management) * Manage company-owned and user-owned mobile devices – BYOD ___ * Centralized management of the mobile devices – _____ functionality * Set policies on apps, data, camera, etc. – Control the ___ – How much of the device does the policy apply to? * Manage access control –It can force ____and __ on these single user devices

- Bring Your Own Device * -Specialized * -remote device -The entire device or a “partition” * -screen locks, PINs

1.4 MDM configurations * Corporate email configuration – User does not need to ___ anything – The ___ makes the changes on the device – ___ details, ____ address, _____ method * Two-factor authentication – Require specific _____types – (hint:Can involve fingerprint/handprint) authentication , ____ authentication app * Corporate applications – ___ or ____ app installation – Prevent ____ app usage

- configure -MDM -Account , server , communication * -authentication - Biometrics,pseudo-random * -allow, restrict -unauthorized

1.4 Configuring a mobile device * Many settings are preconfigured – ___/ __messaging * Email – Everyone handles ___ ___ differently – _____ email configurations can vary * Data synchronization – Data syncing is based on ___ and ___ – Important for ____ and ___

-Telephone / Text * -email services -Corporate * -data rates, speeds -backup, recovery

1.4 Microsoft 365 * Outlook, Exchange – Microsoft’s ____ service – Usually the same for ____ and ____ * Authenticate to Microsoft 365 – You need the _____ and ___ * Select the items to synchronize – Changes in Outlook will appear on the ____ * Same process for Google Workspace – Formerly known as ___

-email -Hotmail, Microsoft * -Username, password * -mobile device * -G Suite

1.4 iCloud * Integrated into iOS and iPadOS – Provide an iCloud ___ and ___ * Select synchronization options – Extensive ___ * Synchronize to macOS – Use your ___, ___, or ___

-username ,password * -customization * -desktop, laptop,mobile device

1.4 Synchronizing data * Data types – M__ – P____, m__, v___ – C_____, C____ * Data caps and transfer costs – ____ vs ___ – Enable or disable network connections – Control the use of ____

-Mail -Pictures, music, video -Calendar, Contacts * - Cellular ,802.11 -___ or ___ network connections -cellular downloads

1.3 Connecting mobile devices * Wired and wireless connectivity – __ and ___ change through the years

-standards, options