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A+ 1101 > Mobile Devices > Flashcards

Mobile Devices Flashcards

(76 cards)

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1
Q

SO-DIMM

A

Small Outline Dual In-Line Memory Module

Used to add memory to a laptop

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2
Q

Magnetic Disk

A

Laptop Storage

Traditional spinning drive platters

2.5 form factors
3.5 for desktops

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3
Q

SSD

A

Solid State Drive

Laptop Storage
All memory, no moving parts
Silent, fast access time, less latency
2.5 in form factors

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4
Q

M.2

A

Laptop Storage

Smaller form factor

No SATA data or power cables

Easy to install and replace

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5
Q

HDD

A

Hard Disk Drive

Memory

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6
Q

Migrating from HDD to SSD
Install an OS on the SSD

A

Move user documents between drives

Install any required applications

Can be time consuming

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7
Q

Different ways to migrate from HDD to SSD

A
  1. Install an OS on the SSD
    Move user documents
    between drives
    Install any required
    applications
  2. Image/Clone the HDD
    No OS installation
    required
    Move everything from
    one to the other
    Imaging software is
    needed
  3. Create and image file
    One drive at a time
  4. Drive to drive image
    Image directly from one
    drive to the other
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8
Q

802.11

A

LAN, high speed, internet access

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9
Q

LAN

A

Local Area Network

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10
Q

Bluetooth

A

PAN
Short Range
Connect peripherals and other nearby devices

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11
Q

PAN

A

Personal Area Network

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12
Q

Biometrics

A

Sign-in/unlock option on your devices
Fingerprint or face

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13
Q

NFC

A

Near-Field Communication

Short-Distance networking (~4cm)
Data transfers or authentication

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14
Q

LCD

A

Liquid Crystal Display

Light shines through liquid crystals

Advantages:
Lightweight
Relatively low power and inexpensive

Disadvantages:
Black levels are a challenge
Requires separate backlight (Fluorescent, LED, etc) and are difficult to replace

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15
Q

TN LCD

A

Twisted Nematic

Original LCD tech
Fast response times (gaming)
Poor viewing angles (color shifts)

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16
Q

IPS LCD

A

In Plane Switching

Excellent color representation
More expensive to produce than TN

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17
Q

VA LCD

A

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

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18
Q

OLED

A

Organic Light Emitting Diode

Organic Compound emits light when receiving an electric current

Thinner and lighter (no glass needed)
No backlight

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19
Q

OLED Examples

A

Tablets, phones, smart watches

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20
Q

Wifi antennas in Laptops

A

Multiple
1. Wifi main and aux (wire wraps about the laptop screen)
2. Bluetooth

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21
Q

Webcam in Laptops

A

Built in camera and microphone
- Specialized drivers and software

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22
Q

Microphone in Laptop

A

Built-in
-Useful for video calls
-Not good for non-casual use
-Analog or USB microphones can help

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23
Q

Fluorescent Backlighting in Laptops (CCFL)

A

-Cold Cathode Fluorescent Lamp
-Higher voltage and power needed that LED backlighting
-Added thickness to the display
-Found more often in older laptops

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24
Q

LED-backlit LCD display

A

-LEDs are located around the edge of the screen
-An array of LEDs behind the screen
-Most new laptops are LED-backlit

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25
LCD Inverter
-Some laptops have inverters -Turn DC (computer power) into AC (fluorescent power)
26
Digitizer
-Use a pen-like device as input -Stylus input -Useful for graphical input
27
Touchscreen device
-Merge laptop and tablet input -Digitizer responds to touch -No keyboard required but often available
28
USB
-Universal Serial Bus -High-speed wired communication -Used for charging and data transfers -Type A (normal)
29
Micro-USB
-A smaller USB connection -Common now worldwide
30
Mini-USB
-Used by older devices -Slightly larger
31
USB-C
-24-pin double-sided USB connector -Used for both hosts and devices -Acts as a USB 2.0/3.0/3.1/4 connection --different signals can use the same connector -Can transmit other signals (DisplayPort, HDMI, Thunderbolt)
32
Lightening Cable
-Apple proprietary -8-pin digital signals Advantages over Micro-USB: -Higher power output for phones and tablets -can be inserted either way -simpler design
33
Serial Interfaces
-"DB-9" -Commonly used for RS-232 signals ---Recommended Standard 232 - Standard before USB --traditionally used for modem connection -Used now as a configuration port (switch, routers, firewalls, etc)
34
NFC
-Near Field Communication -Send small amounts of data wirelessly over a limited area -Short range w/ encryption support
35
Hotspot
-Turn your phone into a wifi hotspot -Your own personal wireless router -Extend the cellular data network to all of your devices
36
Touch pens
-Touchscreen Pen/Stylus -Activate the interface without actually touching it
37
Active Stylus
-Digital Stylus -The stylus communicates directly to the device -Must be compatible with the tablet (Apple Pencil to Apple iPad)
38
Drawing Pad
-Use an active stylus with an external digitizer (very precise input) -Third-party device (support across many operating systems
39
Trackpad
-Replaces the mouse -Can enable or disable -External options available
40
Headsets
-Wired -USB connections are common on laptops -Connects to 3.5mm TRRS (tip-ring-ring-sleeve) connector -Analog audio jack -iPhones can use lightening port
41
Docking Station
-Use external keyboard and mouse -Extend existing laptop interfaces -Add additional functionality -Desktop adapter cards
42
Port replicator
-Similar to a docking station -Does not commonly have an expansion card option -Usually connects using USB
43
GSM
Global System for Mobile Communication -Mobile networking standard -90% of the market -Used by at&t and t-mobile -(move your SIM card from phone to phone) -Slice of time
44
SIM card
Subscriber Identity Module card for phones
45
CDMA
-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 said -Used by Verizon and Sprint -Handsets are controlled by the network provider
46
3G tech
-3rd generation -Upgraded data connectivity over 2G -Bandwidth improvement allowed new functionality (GPS, mobile television, video on demand)
47
4G and LTE
-'Long Term Evolution' -Converged standard (GSM and CDMA) -Standard supports download rates of 150Mbit/sec
48
4G LTE-A
-LTE - Advanced -Standard supports download rates of 300Mbit/s
49
5G
-Significant performance improvements --At higher frequencies -Eventually 10gigiabits/sec -Slower 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
50
PRL Updates
-Preferred Roaming List -CDMA networks (ie Verizon and Sprint) -Allows your phone to connect to the right tower -Can be updated Over The Air (OTA)
51
GPS
-Global Positioning System -Created by DoD -Over 30 satellites in orbit -Need to see at least 4 satellites to measure timing differences
52
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
53
MDM Configuration
-Corporate email configuration -Two factor authentication (biometrics, pseudo-random authentication app) -Allow or restrict app installation -prevent unauthorized app usage
54
TCP
TCP
55
UDP
-User Datagram Protocol -Connectionless (no formal open or close to the connection) -"Unreliable" delivery --No error recovery --No reordering of data or retransmissions -No flow control --Sender determines the amount of data transmitted
56
Why would you ever use UDP?
-Real-time communication -There's no way to stop and resend the data -Time doesn't stop for your network -DHCP (Dynamic Host Configuration Protocol) -TFTP (Trivial File Transfer Protocol)
57
Communications that use TCP and why
-Connection-oriented protocols prefer a 'return receipt' -HTTPS (Hypertext Transfer Protocol Secure) -SSH (Secure Shell) -The application doesn't worry about out-of-order frames or missing data -TCP handles all of the communication overhead
58
Non-ephemeral ports
-Permanent port numbers -Ports 0-1023 -Usually on a server or service
59
Ephemeral ports
-Temporary port numbers -Ports 1024 through 65,535 -Determined in real time by the client
60
Port Numbers
-TCP and UDP ports can be any number between 0-65,535 -Most servers use non-ephemeral port number -Port numbers are for communication not security -Service port numbers need to be well-known -Important for firewall rules (port-based security)
61
FTP
-File Transfer Protocol -tcp/20 = active mode data -tcp/21 = control -Transfers files between systems -Authenticates with a username and password -Some systems use a generic/anonymous login
62
SSH
-Secure Shell -Encrypted communication link -tcp/22 -Looks and acts the same as Telnet
63
Telnet
-Telecommunication Network -tcp/23 -Login to devices remotely (console access)
64
SMTP
-Simple Mail Transfer Protocol -Server to server email transfer -tcp/25 -Also used to send mail from a device to a mail server Other protocols are used for clients to receive emails (IMAP, POP3)
65
DNS
-Domain Name System -Converts names to IP addresses -upd/53
66
DHCP
-Dynamic Host Configuration Protocol -Automated configuration of IP address, subment mask, and other options -udp/167, udp/168 -Requires a DHCP server
67
DHCP Dynamic/Pooled
-IP addresses are assigned in real-time from a pool -Each system is given a lease and must renew at a set interval
68
DHCP Reservation
-Addresses are assigned by MAC address in the DHCP server -Manage addresses from one location
69
HTTP
-Hypertext Transfer Protocol -Communication in the browser and by other applications -tcp/80
70
HTTPS
-Hypertext Transfer Protocol Secure -Secure communication in the browser -Encrypted -tcp/443
71
POP3
-Post Office Protocol version 3 -Receive emails from an email server -Authenticate and transfer -tcp/110 -Basic mail transfer functionality
72
IMAP
-Internet Message Access Protocol v4 -tcp/143 -Receive emails from an email server -includes management of email inbox from multiple clients
73
SMB
-Server Message Block -Protocol used by Microsoft Windows -File sharing, printer sharing -"CIFS" - Common Internet File System -using NetBIOS over TCP/IP (Network Basic Input/Output System) --udp/137 = NetBIOS name services (nbname) --tcp/139 = NetBIOS session service (nbsession) -Direct over tcp/445 (NetBIOS-less) (Direct SMB connection over TCP w/o the NetBIOS transport
74
SNMP
-Simple Network Management Protocol -Gather statistics from network devices -udp/161 = queries -udp/162 = traps
75
LDAP
-Lightweight Directory Access Protocol -tcp/389 -Store and retrieve information in a network directory -Commonly used in Microsoft Active Directory
76
RDP
-Remote Desktop Access Protocol -Share a desktop from a remote location -tcp/3389 -Can connect to an entire desktop or just an application -Clients for Windows, macOS, Linux, UNIX, iPhone, Android, and others

A+ 1101 (6 decks)

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