Section 1: Mobile Device (Notes) Flashcards

Question 1

Q

NFC

Answer

A

It allows smartphones to communicate with each other via radio frequencies by touching them together or in some cases by having them in close-proximity to each other.
The Radio Frequency is 13.56Mhz
it transmits 100 to 400 Kb/s

(NFC is also used for close-proximity transactions, such as contactless payments)

Question 2

Q

S/MIME

Answer

A

(Secure/ Multipurpose Internet Mail Extensions)

It’s used for authentication and message integrity and it’s built into some email clients. In other words it encrypt emails.

Question 3

Q

IMSI ID

Answer

A

(International Mobile Subscriber Identity)

It’s used to identify the user of the device.
For GSM, UMTS, LTE networks it’s loaded into the Subscriber Identity Module (SIM Card).
For CDMA (Code Division Multiple Access) network is loaded directly into the phone or to a removable user identity module (R-UIM) which is similar to a SIM Card

Question 4

Q

IMEI ID

Answer

A

(International Mobile Equipment Identity)

It’s used to identify the phone that is being used
New Devices: Settings -> General -> About
Old Devices: It’s printed inside the phone either on or near the battery.

Question 5

Q

SSO

Answer

A

(Single Sign-On)

is when a user is authenticated to multiple services simply by logging in with a single username and password (it’s all linked together)
This is a type of a Federated Identity Management (FIM)

Question 6

Q

POP3 and IMAP

Answer

A

(Post Office Protocol version 3 ; Internet Message Access Protocol)

They both require a username, password and a SMTP (Simple Mail Transfer Protocol) server

Question 7

Q

POP3

Answer

A

Original Port: 110

Secure Port: 995

Question 8

Q

IMAP

Answer

A

Original Port: 143

Secure Port: 993

Question 9

Q

SMTP

Answer

A

Original Port: 25

Secure Port: 465 or 587

Question 10

Q

PRL

Answer

A

(Preferred Roaming List)

It utilizes CDMA technology instead of GSM
It’s a database on a mobile device containing radio bands, sub-bands and service provider IDs allowing the device to establish connection with the right cell phone tower.

Question 11

Q

Basebands

Answer

A

It’s also referred to as Radio Firmware that controls network connectivity for GSM
The phone and its Radio functions are controlled by a chip and software package.

Question 12

Q

IoT

Answer

A

(Internet of Things)

A computing concept that describes a future where everyday physical objects will be connected to the Internet and be able to identify themselves to other devices.
Physical Objects: refrigerators, digital thermostats, home automation devices, medical, manufacturing, and transportation industries, among others.

Question 13

Q

Inverter

Answer

A

It’s a device that converts DC (Direct Current) voltage that comes from the motherboard into AC (Alternating Current) voltage to be used by the display’s backlight

Question 14

Q

Backlight

Answer

A

is a bulb (Cold Cathod Fluorescent Lamp; CCFL), it emits light through the screen so that you can see the image that the computer is attempting to display.

Question 15

Q

LCD

Answer

A

(Liquid-Crystal Display)

They have replaced CRTs (Cathode-ray tube) as the display of choice for desktop computer users.
Most LCDs screens are Thin-Film Transistor (TFT) or active-matrix displays
They generate small amount of heat
They use more electricity than newer types of displays because they utilize a high-powered bulb, quite often a Cold Cathode Fluorescent Lamp (CCFL).

Question 16

Q

LED

Answer

Study These Flashcards

A

(Light-Emitting Diode)

LCD uses CCFL and LED uses Light-Emitting Diodes.
Electroluminescence: the release of photons when LED uses Light-Emitting Diode
These diodes are Red, Green, and Blue (RGB).
They are more efficient because they use less power than traditional LCDs.
Hybrid Designs: known as LED-backlit LCD. It utilize diodes instead of CCFL but with an LCD screen.