1.0 Mobile Devices Detailed

Question 1

What form factors do SSDs come in?

Answer 1

2.5 inch and 1.8 inch form factors (1.8 inch is rarer and found on older laptops)

Question 2

What 3 types of hard drives will you see in a laptop?

Answer 2

1. SSDs (Solid-State Drives) which are faster, more expensive, and use flash memory.
2. SSHD (Solid State Hybrid Drives) Flash memory and hard drive storage. SSD caches the hard drive data
3. MAGNETIC DISK with traditional spinning platters

Question 3

What are the two types of memory you are most likely to find in a laptop?

Answer 3

1. SO-DIMM (Small Outline Dual In-Line Memory Module)

2. Micro-DIMM (Micro-Dual In-Line Memory Module)

Question 4

What are two types of PCI cards used in laptops?

Answer 4

1. Mini PCIe

2. Mini PCI Express

Question 5

What are two types of screens you are likely to see on modern mobile devices?

Answer 5

LCD (liquid crystal display) and OLED (organic light-emitting diode)

Question 6

How do LCD displays work?

Answer 6

Backlight shines through liquid crystals

Question 7

What do you call displays that allow you to write directly on them?

Answer 7

Digitizers

Question 8

What is the difference between virtual reality and augmented reality?

Answer 8

Virtual reality replaces the physical world with a computer-generated one. Augmented reality overlays a virtual reality over the physical world

Question 9

What is the display technology commonly used in e-readers?

Answer 9

Electronic paper

Question 10

What does GPS stand for?

Answer 10

Global positioning system

Question 11

What are two types of laptop AC adapters?

Answer 11

Auto-switching or fixed input, both convert AC to DC

Question 12

What voltages can a laptop AC adapter support?

Answer 12

110 volts and 220 volts

Question 13

What do we call a type of display that allows us to use a pen-like device as input?

Answer 13

Digitizer

Question 14

What are the types of mobile connections standardized by the EU?

Answer 14

Micro-USB (more commong) and mini-USB

Question 15

What is the proprietary connector used in most Apple mobile devices called?

Answer 15

Lightning Connector

Advantages: Higher power output, can be inserted either way

Question 16

What is the difference between tethering and a hotspot?

Answer 16

Tethering physically connects a device to your mobile phone to use the internet/data connection.
Hotspots turn your phone into your own personal router which allows devices to connect to it via wifi.

Question 17

What is the name of the technology that allows you to send small amounts of data wirelessly over a limited area? e.g. payment systems, transportation, in-person information exchange

Answer 17

NFC (Near Field Communication)

Question 18

What’s another name for a PAN (Personal Area Network)? This allows for high speed communication over short distances.

Answer 18

Bluetooth

Question 19

What would you use if you wanted to increase the storage capacity of your smartphone/tablet? Hint: there are two types, and are not available for use on iOS devices.

Answer 19

SD Memory Card and microSD memory card (more common nowadays)

Question 20

What is a common mobile functionality that allows you to turn off all radios (cellular, wifi, bluetooth, nfc, etc.)

Answer 20

Airplane mode

Question 21

What is the approximate range for bluetooth connectivity?

Answer 21

About 10 meters (32 feet)

Question 22

What is the name for the component of your phone that is required to connect your phone to the cellular network?

Answer 22

BASEBAND RADIO PROCESSOR
Cellular networks are connected via radio signals - in order for your phone to connect to the cellular network it requires this network interface to enable radio connectivity

Question 23

What component of a mobile phone tells your phone which cellular towers to connect to?

Answer 23

PRL updates
(Preferred Roaming List)
Often updated OTA (over the air, i.e. you are not aware that it is being updated)

Question 24

What component of your phone is required in order to update ID numbers, network codes, country codes, etc?

Answer 24

PRI updates (preferred release instructions)
Often updated OTA (over the air, i.e. you are not aware that it is being updated)

Question 25

Every phone has a unique ID that identifies the actual physical device. What is this called?

Answer 25

IMEI

- International Mobile Station Equipment Identity

Question 26

Phones must have a way to identify the specific user. Often a SIM card can be swapped with another phone to transfer ownership of a physical device. What is this called?

Answer 26

IMSI

- International Mobile Subscriber Identity

Question 27

What is a technology you can enable on your phone to secure/encrypt communication?

Answer 27

VPN

Question 28

What email protocol is used for SENDING email to our email server?

Answer 28

SMTP (Simple Mail Transfer Protocol)

Question 29

What are two email protocols used for RECEIVING email from an email server?

Answer 29

• POP3 (Post Office Protocol 3)

* IMAP4 (Internet Message Access Protocol)

Question 30

SMTP Port Numbers:

Answer 30

• SMTP (no authentication, relatively unused): tcp/25

* SMTP with authentication: tcp/587

Question 31

POP3 Port Numbers:

Answer 31

• POP3: tcp/110

* SSL (Secure Socket Layer) settings - POP3S: tcp/995

Question 32

IMAP Port Numbers:

Answer 32

• IMAP: tcp/143

* SSL (Secure Socket Layer) settings - IMAPS: tcp/993