1.0 - Mobile Devices Flashcards
- SSD
Does it move
Connected via…
Does it make sound
Fast or slow
(Solid-state drive)
– All memory, no moving parts
– Silent, fast access time, less latency
– 2.5 inch form factors
- connected with Sata cable
M.2
Where is it located
Smaller the ssd
M.2 is a slot on the motherboard
– Smaller form factor
– No SATA data or power cables
– Easy to install and replace
how is a keyboard connected
A few screws and a single ribbon cable
connect an external USB keyboard
SO-DIMM
Where is it located
It’s a type of___
- Small Outline Dual In-line Memory Module
- Memory used in laptops and mobile devices
- easily inserted into the memory slot on the motherboard
- It is a type of RAM
A hard drive is a ___ and ___disk
It’s size in laptop vs desktop
Does it spin
They store ____
Magnetic disk
– Traditional spinning drive platters
– 2.5 form factors (3.5 inch for desktops)
How do you replace a Hard Drive, SSD, and M.2
- All internal
– Open a cover on the back
– Open the entire laptop - Can be very modular
– Two screws and the drive slides out - M.2 drives are even easier
– One screw - similar to RAM installation
What are the 2 ways of
Migrating from HDD to SSD
- Install an OS on the SSD
– Move user documents between drives
– Install any required applications
– Can be time consuming - Image/clone the HDD
– No OS installation required
– Move everything from one to the other - Imaging software needed
– Sometimes included with the SSD
– Many commercial and open source options
802.11
What is LAN
– Local area network (LAN)
– High speed, Internet access
Bluetooth
PAN
– Personal area network (PAN) - Short range
– Connect peripherals and other nearby devices
what is NFC
Near-field communication (NFC)
* Short-distance networking
– 4 centimeters or less
– Data transfers or authentication
What is LCD
- Liquid crystal display
– Light shines through liquid crystals
Advantages and disadvantages of LCD
- Advantages
– Lightweight
– Relatively low power
– Relatively inexpensive - Disadvantages
– Black levels are a challenge
– Requires separate backlight
– Florescent, LED, etc.
– Lights are difficult to replace
- TN (Twisted Nematic) LCD
Is it fast
How are the viewing angles in regards to color
– The original LCD technology
– Fast response times (gaming!)
– Poor viewing angles - color shifts
- IPS (In Plane Switching) LCD
How is the color
It’s more expensive then what
– Excellent color representation
– More expensive to produce than TN
- VA (Vertical Alignment) LCD
How fast is it
Is it a compromise
– A good compromise between TN and IPS
– Good color representation
– Slower response times than TN
What is OLED
Does it have glass
Does it need a backlight
How is the color
Is it expensive
- Organic Light Emitting Diode
– Organic compound emits light when
receiving an electric current - Thinner and lighter
– Flexible and mobile - no glass needed - No backlight
– The organic compound provides the light - Tablets, phones, smart watches
– Very accurate color representation
– A bit higher cost than LCD
Where are WIFI Atenas located
- Multiple antennas
– WiFi main and aux / Bluetooth - Antenna wires wrap around the laptop screen
– It’s up high!
What is CCFL backlight
Does it require a lot of power
Is it a thinner or thicker display
Is it common
Cold Cathode Fluorescent Lamp
A display backlight
– Higher voltage and power needed
– Added thickness to the display
– No longer a common backlight
– Older laptops will use these
what is * LED
Light Emitting Diode
– 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
what is an inverter
Turn DC into AC for the backlight
Digitizer
- Use a pen-like device as input
– Stylus input - Useful for graphical input
USB
- Universal Serial Bus
– High-speed wired communication
– Used for charging and data transfers
- Micro-USB
– A smaller USB connection
– Common now worldwide
* Older devices may use Mini-USB
– Slightly larger
how many pins in a USB-C
- 24-pin double-sided
what acts as a * Acts as a USB 2.0/3.0/3.1/4 connection
USB-C
usb c can also be used as a
– DisplayPort, HDMI, Thunderbolt
Lightning
– 8-pin digital signals
* Apple proprietary
– Higher power output for phones and tablets
– Can be inserted either way
A DB-9 connector
What kind of connector
Used for what signals
Standard since what year
Used for what 3 things now
- serial connector
- used for RS-232 signals
- industry standard since 1969
- Now used as a configuration port
– Switches, routers, firewalls, etc.
– Use a USB to DB-9 converter cable
- Now used as a configuration port
Active stylus
A more advanced writing tool
* The stylus communicates directly to the device
– Pressure sensitivity, programmable buttons, etc.
* Must be compatible with the tablet
– e.g., Apple iPad uses an Apple Pencil
Drawing pad
- Use an active stylus with an external digitizer
– Very precise input
what kind of connector for headsets
TRRS (tip-ring-ring-sleeve) connector
Port replicator
- Port replicator
– Similar to a docking station
– Does not commonly have an expansion card option
– Usually connects using USB
- 2G networks
– GSM - Global System for Mobile Communications
– CDMA - Code Division Multiple Access
* Poor data support
– Originally used circuit-switching
– Minor upgrades for some packet-switching
Global System for Mobile Communications
Used by what cell providers
Move what from phone to phone
What does it use m—
- Used by AT&T and T-Mobile in the United States
– Move your SIM card (Subscriber Identity Module) from
phone to phone - Original GSM standard used multiplexing
– Everyone gets a little slice of time
- Code Division Multiple Access
Is a cell network used by
Each call uses a ___ to filter each call
– 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
3G technology Bandwidth improvement allowed new functionality what year
– GPS
– Mobile television
– Video on demand
– Video conferencing
– Introduced in 1998
4G and LTE stand for
long term evolution
4g and lte was based on
– Based on GSM and EDGE
(Enhanced Data Rates for GSM Evolution)
4G and LTE – Standard supports download rates of
150 Mbit/s
LTE Advanced (LTE-A)
– Standard supports download rates of
300 Mbit/s
5G
* Fifth generation cellular networking
– Launched worldwide in
2020
5G speeds
How many gigabits
And mbits
Eventually 10 gigabits per second
– Slower speeds from 100-900 Mbit/s
5g improvements include
What becomes less of a constraint
____ data transfers
Additional ___ processing
– Bandwidth becomes less of a constraint
– Larger data transfers
– Faster monitoring and notification
– Additional cloud processing
what is PRL what does it do
(Preferred Roaming List)
* Allows your phone to connect to the right tower
Can be updated over the air (OTA)
What is OTA
over the air
what does GPS stand for
who created it
how many satellites in orbit
(Global Positioning System)
* Created by the U.S. Department of Defense
– Over 30 satellites currently in orbit
how many satellites of gps to have Precise navigation
4
– Determine physical location based on
GPS, WiFi, and cellular towers
MDM
(Mobile Device Management
Manage company-owned and user-owned mobile devices
* Set policies on apps, data, camera, etc
Manage access control
– Force screen locks and PINs on these single user devices
Microsoft 365
offers
3 things
- Outlook, Exchange Hotmail
