Lecture 2: Networks - 11/1

Question 1

Computer network

Answer 1

A set of computers/devices connected together, which transfer data using a common set of communication protocols

Question 2

Local Area Network (LAN)

Answer 2

Connects two or more devices within a geographic region, usually within the same building. A physical connection is required

Question 3

Name the 3 types of cable media

Answer 3

Twisted pair, coaxial, and fiber optic cables

Question 4

Which of the 3 types of cable media is least secure?

Answer 4

Twisted pair cables

Question 5

Which of the 3 types of cable media is most secure?

Answer 5

Fiber optic cables

Question 6

Transfer protocols

Answer 6

Used for the transfer of files over a TCP-based (transmission control protocol) network like the Internet

Question 7

MAC/URL addresses

Answer 7

Unique addresses given to each device on a network used to identify and locate it

Question 8

Wireless networks (WLAN)

Answer 8

Eliminates the need for wired transmission but comes with less bandwidth

Question 9

What are the 4 network topologies?

Answer 9

Star, BUS, ring, MESH

Question 10

Cons of BUS and ring topology

Answer 10

If a connection at one point is severed, everything after that point will also be cut off

Question 11

Pros of star topology

Answer 11

You can remove devices from the network without detriment

Question 12

The Internet

Answer 12

Many computers connected together through wires/cables

Question 13

What is needed to form a computer network?

Answer 13

1. Devices to be connected together
2. Some way to connect them (wires/cables, WiFi)
3. A transfer protocol or language
4. Addresses for the devices

Question 14

World Wide Web (www)

Answer 14

A system or convention for exchanging information over the internet

Question 15

The Cloud

Answer 15

A network of computers located somewhere else which you can access remotely, allowing you to store data/files, run software, play video games, etc

Question 16

Advantages of cloud-based computing

Answer 16

Someone else maintains the system
Data is backed up many times
Resources are available from anywhere
You can run high-power programs from cheap/small devices
You don’t have to upgrade or repair equipment

Question 17

Risks of cloud-based computing

Answer 17

Reliability, privacy, security, and illegal activity

Question 18

Types of cloud computing

Answer 18

Infrastructure as a Service (IaaS), Platform as a Service (PaaS), Software as a Service (SaaS)

Question 19

What is IaaS and examples?

Answer 19

Provides remote computing resources such as storage and servers. Amazon Web Services (AWS)

Question 20

What is PaaS and examples?

Answer 20

Provides access to a remote environment for developing, managing, and hosting applications. salesforce.com

Question 21

What is SaaS and examples?

Answer 21

Provides access for running remote software on remote devices. Microsoft Office 365