Chapter 1

Question 1

Internet

Answer 1

The Internet is a worldwide network of networks based on the TCP/IP protocol. The Internet is not owned by a single company or organization. At the heart of the Internet are high-speed data communications lines between major host computers, consisting of thousands of commercial, government, educational, and other computer systems that route data and messages.

Question 2

Battery

Answer 2

Power source for a portable computer, typically a rechargeable Lithium-ion (Li-ion) type. A small coin cell battery is also used in a computer to power CMOS RAM.

Question 3

Cell Phone

Answer 3

Mobile telephony works through a series of base station transmitters (cells) that connect to the cellular and telephone networks. This network can be used for voice and data communications. Data communications are divided into 2G (GSM; up to about 14 Kbps), 2.5G (GPRS, HSCSD, and EDGE; up to about 48 Kbps), 3G (WCDMA; up to about 2 Mbps), 4G (LTE; up to about 150 Mbps), and 5G (up to 1 Gbps).

Question 4

Embedded System

Answer 4

A computer system that is designed to perform a specific, dedicated function, such as a microcontroller in a medical drip or components in a control system managing a water treatment plant.

Question 5

Firmware

Answer 5

This refers to software instructions stored semi-permanently (embedded) on a hardware device (BIOS instructions stored in a ROM chip on the motherboard for instance).

Question 6

Internet of Things (IoT)

Answer 6

The global network of personal devices (such as phones, tablets, and fitness trackers), home appliances, home control systems, vehicles, and other items that have been equipped with sensors, software, and network connectivity.

Question 7

Laptop/Notebook

Answer 7

A powerful portable computer offering similar functionality to a desktop computer. Laptops come with built-in LCD screens and input devices (keyboard and touchpad), and can be powered from building power (via an AC Adapter) or by a battery. Peripheral devices are typically connected via USB, PCMCIA, or ExpressCard adapters.

Question 8

Mobile Device

Answer 8

Portable phones and smart phones can be used to interface with workstations using technologies such as Bluetooth or USB. As such, they are increasingly the focus of viruses and other malware. Portable devices storing valuable information are a considerable security risk when taken offsite.

Question 9

Mobile Phone

Answer 9

UK English term for a cell phone.

Question 10

Smartphone

Answer 10

A mobile device that provides both phone and SMS text messaging functionality and general purpose computing functionality, such as web browsing and email plus running software apps. Smartphones typically have screen sizes of between 4 and 5.5 inches.

Question 11

Tablet

Answer 11

A type of ultra-portable laptop with a touchscreen, widely popularized by Apple’s iPad devices running iOS. Tablets are usually based on form factors with either 7” or 10” screens. As well as iOS devices, there are tablets from various vendors running Android plus Microsoft’s Surface tablet running Windows and various laptop/tablet hybrid Windows devices. A phablet is a smaller device (like a large smartphone).

Question 12

What systems use a Central Processing Unit (CPU) and memory?

A. Desktops only
B. Servers only
C.All types of computers
D.Laptops only

Answer 12

C

A Central Processing Unit (CPU) and memory are used by all types of computers including servers, desktops, and laptops. The CPU retrieves each instruction or data file from memory and processes it. After, the CPU writes the results back to memory and directs other components to perform actions.

Servers are a type of computer that uses a CPU and system memory along with desktops and laptops.

Desktops are a type of computer that uses a CPU and system memory along with servers and laptops.

A laptop is a type of computer that uses a CPU and system memory along with servers and desktops.

Question 13

What type of computer is most likely to need peripheral devices?

A. Smartphone
B. Laptop
C. Desktop
D.Server

Answer 13

C

Desktop computers are more likely to need peripheral devices. The peripheral devices would be used to manage specific input and output processes (like printing) when necessary. Another way to look at peripheral devices is that they are dependent on the computer system. For example, most printers can’t do much on their own, and they only become functional when connected to a computer system.

Laptops and or tablets can have peripheral devices, but peripheral devices would end up weighing them down and making them less mobile.

A smartphone is rarely used in situations where you would need a peripheral device.

Servers do not usually have peripheral devices on them.

Question 14

What type of computer is best suited for using in a job where you have to make notes and be able to move around easily?

A. Desktop computer with an electronic stylus.    B. A server that is mounted on a cart for easier mobility.    C. A tablet or smartphone or possibly a hybrid laptop/tablet.    D. Gaming console with voice activated commands.

Answer 14

C

The best computer suited for a job where you take notes and move around a lot is a tablet or smartphone. Furthermore, they are good for keeping you connected to all your favorite social networks. A smartphone will enable you to use Internet search engines on the move, shop at online stores, and bring all the latest news and sports into your hand.

Servers are just too big to be used for this type of activity. Even if you put it on a cart, most servers require a separate keyboard/video/monitor (KVM) remote device to use them.

A desktop computer would be too cumbersome to take notes on and move around with even if you had an electronic stylus.

A gaming console is best suited for playing video games.

Question 15

Which is a true statement regarding whether or not laptops make good servers?

A. Their size and weight make them perfect for a server rack, and this allows for better cooling.
B. There are limited options for expansion, and its components are not practical for network-wide use cases.
C. Their redundancy makes them reliable, particularly during power outages.
D. Their mobility allows for more flexibility in where you store the server.

Answer 15

B

Laptops have limited options to expanding resources and storage, and therefore cannot compare to the performance of a full rack server, for example. A laptop is also not meant to run nonstop for long periods such as months or years. Overheating and battery life will be problematic.

Their size and weight do not make them ideal for server racks (they are just too small).

There is absolutely no room for redundancy in laptop computers.

While mobility is the key to a good laptop, it doesn’t usually make for a good server.

Question 16

Why is a smartphone NOT a good tool for writing a report?

A. They have great user interfaces that enable you to write quickly.
B. Touchscreen or mini keyboards are not optimized for writing lots of text.
C. They have large displays with excellent resolution.
D. Their size makes them easy to place in ergonomic positions.

Answer 16

B

Smartphones do not make good tools for writing reports because their touchscreens or mini keyboards are not large enough to write large text files on, so they are not optimized for writing lots of text. Furthermore, there are some privacy concerns with Smartphones. If your phone is stolen then information will no longer be private.

While smartphones do have pretty good user interfaces that can help you write quickly, they are still too small to be of any use as a word processing tool.

Although smartphone sizes are increasing, their displays are still too small for effective word processing.

Holding a smartphone for a lengthy period of time can be harmful from an ergonomic perspective. Very few people use smartphones in an ergonomically-safe method.

Question 17

What IoT device may contain a “black box” that is able to record event data?

A. Environmental controls
B. Home appliances
C. Window curtains
D. Smart Vehicle

Answer 17

D

Many modern vehicles use a substantial amount of electronics and are Internet-connected. Some vehicles are fitted with a “black box,” or event data recorder, that can log the car’s telemetry (acceleration, braking, and position).

There are now many Environmental Control Units (thermostats, heaters, air conditioners) that are controlled via a home automation hub.

Some of the newer smart refrigerators are specifically marketed to be used with a home automation hub. You may be surprised with all of the household items that can connect to a hub.

There is a market for window shades and curtains to be connected to a hub to control lighting in a house. These devices typically connect to an automation hub.