GOOGLE IT SUPPORT PROFESSIONAL CERTIFICATE

Course 1- Technical Support Fundamentals

Week 4: Networking

Coursera Study Guide

TABLE OF CONTENT

In the fourth week of this course, we’ll learn about computer networking. We’ll explore the history of the Internet and what “The Web” actually is. We’ll also discuss topics like Internet privacy, security, and what the future of the Internet may look like. You’ll also understand why the Internet has limitations even today. By the end of this module, you will know how the Internet works and recognize both the positive and negative impacts the Internet has had on the world.

Learning Objectives

  • Recognize the positive as well as negative impacts of the Internet such as privacy and security.
  • Understand the basics of computer networking.
  • Understand the basics of how data travels across the Internet.

PRACTICE QUIZ: WHAT IS AN OPERATING SYSTEM?

1. True or false: The Internet is the World Wide Web.

  • TRUE
  • FALSE (CORRECT)

Correct! The Internet is mistakenly referred to as the World Wide Web, but it’s just the physical connection of computers and wires around the world. The Web is the information on the Internet.

2. What is the fundamental protocol that the Internet uses today?

  • DHCP
  • HTTP
  • TCP/IP (CORRECT)
  • FTP

Nice work! The TCP/IP protocol is what allowed computers to share information outside their network, which stemmed the creation of the Internet as we know it today.

3. True or false: You should only worry about computer security if you work in a computer security role.

  • TRUE
  • FALSE (CORRECT)

Well done, you! Computer security affects everyone whether it’s in your personal life or work life. You and everyone around you should exercise good computer security practices.

4. There are 4 bytes in an IPv4 address. What is the highest decimal value you can have for one byte?

  • 128
  • 255 (CORRECT)
  • 256
  • 512

Great job! There are 256 available values in a byte with decimal values ranging from 0 to 255.

5. Which of the following protocols is the primary infrastructure that creates the Internet?

  • DNS
  • NAT
  • HTML
  • TCP/IP (CORRECT)

Nice work! The TCP/IP protocol is what allowed computers to share information outside their network, which stemmed the creation of the Internet as we know it today.

6. A(n) ______ is an interconnection of computers.

  • service
  • packet
  • ethernet cable
  • network (CORRECT)

You got it! You can connect many computers together to form a network.

7. In an IT field, managing, building, and designing networks is known as ______.

  • coding
  • networking (CORRECT)
  • engineering
  • management

Great job! The management and building of networks is known as networking.

8. True or false: The Internet of Things is a concept that’s allowing more devices to be connected to the Internet.

  • True (CORRECT)
  • False

Right on! Common manual devices, like thermostats, kitchen appliances, and more, are being connected to the Internet thanks to the Internet of Things.

GRADED ASSESSMENT: NETWORKING

1. Which of the following devices are used in networking? Check all that apply.

  • Routers (CORRECT)
  • Hubs (CORRECT)
  • Switches (CORRECT)
  • TCP

Wohoo! These are all physical devices used in networking

2. Which one of these are a valid IPv4 address? Check all that apply.

  • 345.0.24.6
  • 255.255.255.0 (CORRECT)
  • 1.1.1.1 (CORRECT)
  • 54.45.43.54 (CORRECT)

Great job! IPv4 address are separated into 4 bytes, and each byte can have a value from 0 to 255.

3. Devices on a network are identified by which of the following?

  • Ethernet cable
  • MAC address and IP address (CORRECT)
  • Username and IP addresses
  • ISPs and IP addresses

Nice work! The MAC address and IP address are the unique identifiers that identify devices on a network.

4. Which statement is true about the Internet and the World Wide Web?

  • The Internet is the World Wide Web.
  • The Internet is a way to access the World Wide Web.
  • The World Wide Web is the only way to access the Internet.
  • The World Wide Web is a way to access the Internet. (CORRECT)

Great job! We can access the internet through world wide web.

5. You’re having trouble connecting to the Internet, so you call your Internet Service Provider for help. They need to know the permanent unique identifier of your networking device, to help them troubleshoot. What are they asking for?

  • MAC address (CORRECT)
  • IP address
  • URL address
  • ISP address

Great work! Devices that can connect to a network have a unique identifier called a MAC (media access control) address. MAC addresses are generally permanent and hard coded onto a device.

6. Which statements are true about routers? Check all that apply.

  • A router utilizes network protocols to help determine where to send data packets. (CORRECT)
  • A router connects devices together and helps direct network traffic.  (CORRECT)
  • A router can only send data to another computer that’s on the same network.
  • A router is a set of components that makes up computer networking.

You nailed it! A router connects lots of devices together and helps route network traffic. The packets go through the router, and the router utilizes network protocols to help figure out where to send the data.

7. What is http://www.google.com an example of?

  • URL (CORRECT)
  • ICANN
  • ISP
  • HTTP

Woohoo! A URL, which stands for Uniform Resource Locator, is a human readable web address like http://www.google.com.

8. What was the main limitation of computer networking that the invention of the World Wide Web solved in the 1990s?

  • The TCP/IP protocol could only be used in universities, governments, and businesses.
  • Networks couldn’t talk to each other.
  • People could only receive the information in the form of text.  (CORRECT)
  • People around the world could not send data to one another.

You got it! Before World Wide Web, information was only sent to one another in the form of text.

9. You need to update your router settings, so you log into the administration panel, whose Internet Protocol (IP) address is 192.168.0.1. Which IP version is this?

  • IPv1
  • IPv6
  • IPv2
  • IPv4 (CORRECT)

You got it! IPv4 (Internet Protocol version 4) is an address that consists of 32 bits separated into 4 groups. This means that each group can have values from 0 to 255, making 192.168.0.1 a valid IPv4 address.

10. Which statement is true about computer security?

  • Computer security is everyone’s responsibility. (CORRECT)
  • Computer security is only necessary for governments and big businesses.
  • Computer security is the job of specialized security engineers.
  • Computer security does not affect the gaming industry.

You nailed it! Computer security is no longer the job of specialized security engineers. It’s everyone’s responsibility, and is an important issue that you may face in both your personal and professional life.

11. What protocol allows us to use a domain name like google.com instead of an IP address?

  • NAT
  • TCP/IP
  • DNS (CORRECT)
  • ICMP

You nailed it! Computer security is no longer the job of specialized security engineers. It’s everyone’s responsibility, and is an important issue that you may face in both your personal and professional life.

12. What type of address do computers use to find something on a network?

  • URL address
  • IP address (CORRECT)
  • MAC address
  • ISP address

13. You’re browsing the Web, and type in http://www.Coursera.com in the address line. Instead of the website, an error screen appears. You type in 54.174.155.206, and the Coursera website comes up. What’s the most likely reason for this?

  • Web addresses must be entered in lowercase
  • Address line is for the IP address only, not the domain name
  • There’s a problem in your network’s DNS configuration (CORRECT)
  • There’s a problem with your internet connection

14. What was the biggest problem with the earliest version of the Internet in the late 1960s?

  • Networks couldn’t talk to each other (CORRECT)
  • There was no way to remotely access any computer
  • The TCP/IP protocol could only be used in universities, governments, and business.
  • Computers were too big and bulky for accessing the internet

15. What are the drawbacks of purchasing something online? Check all that apply.

  • Product selection is not as big as what’s available in physical store locations
  • Personal buying preferences can be tracked and used to bombard you with excessive marketing (CORRECT)
  • Someone can use your photographs in their own business and not share the profits with you.
  • Confidential information like your credit card number can be stolen and used by someone else. (CORRECT)

Correct: Well done! Giving your personal and financial information to online retailers can lead to consequences ranging from unwanted advertising to identity theft. It’s up to you to decide if the tradeoffs of a product or service are worth sharing your information.

16. What do we call data that’s broken down into bits and sent through a network?

  • Pages
  • Binary
  • Memory
  • Packets (CORRECT)

17. What is known as networking in the IT field? Check all that apply.

  • Building Networks (CORRECT)
  • Joining professional networks
  • Designing networks (CORRECT)
  • Managing networks (CORRECT)

18. Which of the following cables are used in networking? Check all that apply.

  • Ethernet (CORRECT)
  • HDMI cable
  • Auxiliary cable
  • Fiber optic cable (CORRECT)

Correct: Right on! An ethernet and fiber optic cable are used in networking.

19. True or false: You can create a network with two computers.

  • True (CORRECT)
  • False

Correct: Yes! A network can be made up of two or more computers.

20. Which protocol is used to handle delivery of information from one network to another?

  • Hyper Text Transfer Protocol
  • Transmission Control Protocol (CORRECT)
  • Internet Protocol
  • File Transfer Protocol

Correct: You nailed it! The Transmission Control Protocol or TCP is a protocol that handles reliable delivery of information from one network to another.

21. Which Internet Protocol version is 100.0.0.256?

  • IPv6
  • IPv2
  • Not a valid IP address (CORRECT)
  • IPv4

Correct: Well done! IPv4 is the first version of the IP protocol. IPv4 addresses are separated into 4 bytes, and each byte can have a value from 0 to 255. IPv6 addresses are in groups of four hexadecimal digits, separated by colons.