Mobile Devices Flashcards
LCD
Liquid Crystal Display
-Standard display for laptops
-Low Power
-Poor Black levels
-Lights hard to replace
3 types of LCD
TN (Twisted Nematic) LCD
IPS (In Plane Switching) LCD
VA (Vertical Alignment) LCD
Twisted Nematic (TN) LCD
-Fast response times (gaming)
-Low color quality
-Low viewing angles
In Plane Switching (IPS) LCD
-High Color quality
-Wide viewing angles
-Slow response times
-More expensive
Vertical Alignment (VA) LCD
-Good compromise between TN and IPS
-Slow response times
OLED
Organic Light Emitting Diode
-No backlight
-Tablets, phones, smartwatches
Inverters
-Turn DC into AC
-Power to florescent backlights in older LCD panels
Digitizer
Tablets/Laptops
Stylus input
Touchscreens
USB
Universal Serial Bus
-High speed wired communication
-Used for charging & data transfers
USB-C
24-pin double-sided USB connector
Can transmit many signals (DisplayPort, HDMI)
Lightning
iPhones/iPads
-Higher power output
-Faster charging speeds
Serial Interfaces
DB-9/DE-9 connections
-232 signals
-Not as common today
NFC
Near Field Communication
-Send small amounts of data wirelessly
-SSO/apple pay
Battery types in Laptops
-Lithium-ion (Li-ion)
-Lithium-ion Polymer (LiPo)
Port Replicator
Consists of multiple ports
-Similar to docking station
-Connects using USB port
SO-DIMM
Small Outline Dual In-Line Memory Module
-Memory used in laptops and mobile devices
2 types of internal data storage
Magnetic disks (Hard drives)
Solid-State Drives (SSD)
Magnetic Disk
Hard drives
-Traditional spinning drives
-2.5 inch form factors
Solid-State Drive (SSD)
All memory, no moving parts
-2.5/1.8 inch form factor
802.11 Wireless & Bluetooth
High-speed internet access
-Local Area Network (LAN)
-Wireless Local Area Network (WLAN)
Bluetooth
-Personal Area Network (PAN)
-Wireless Personal Area Network (WPAN)
-Connect peripherals/personal devices
WWAN
Wireless Wide Area Network
-Cellular Networks
GSM
-Global System for Mobile Communications
-AT&T and T-Mobile
-SIM (Subscriber Identity Module) cards from phone to phone
-Multiplexing (everyone gets a little slice)
CDMA
-Code Division Multiple Access
-Verizon and Sprint
-Everyone communicates
-Each call uses a code
2G Networks
-GSM and CDMA
-Poor data support
3G Networks
-Improved speeds
-Allowed for new functionality (GPS, mobile TV, video on demand, video conferencing)
4G (LTE)
-Long Term Evolution
-Combined GSM and CDMA providers
-150 Mbit/s
LTE-A
-LTE Advanced
-300 Mbit/s
5G Networks
-100 to 900 Mbit/s
-Significant IoT impact (large data transfers)
Cellular Updates
-PRL and OTA
-Allows phone to connect to the right tower
PLR
-Preferred Roaming List
-Updates for CDMA networks (Verizon/Sprint)
OTA
Over-the-air updates for cellular
Mobile Hotspot
-Type of WLAN
-Acts as a portable WAP
Pairing
-Connecting bluetooth devices to each other
Security feature for Bluetooth
PIN (Personal Identification Number) Code
GPS
-Global Positioning System
-Location services/geotracking
Bluetooth Pairing Process
-Enable Bluetooth on both devices
-Set to discoverable
-Select device
-Enter/Confirm PIN
-Test connectivity
MDM
-Mobile Device Management
-Centralized administration of company/user-owned devices (policies/procedures etc)
MDM Config: Corporate Email
-MDM makes changes to device
MDM Config: Two-Factor Authentication
-Requires specific authentication types
MDM Config: Corporate Applications
-Allow/Restrict applications
-Prevent application usage
