EOU Assessment: 3.3 Data Transmission

A. Fill in the Blanks

Word Bank: packets, binary, attenuation, encrypted, crosstalk

1. Data transmitted over a network is divided into small units called

2. Computers translate and store all data using the language of 1s and Os, which is called

3. When a wireless radio wave becomes weaker because it passes through a solid object like a wall, this is called

4. To ensure personal information is kept secure from hackers, it must be before it is transmitted across the internet.

5. Electrical energy leaking between networking cables that are placed too closely together creates unwanted effects called

B. Multiple Choice Questions

6. What happens during an electricity surge in a network cable?

A) Data packets travel faster than normal.

B) A sudden increase in voltage disrupts the transmission, often causing data errors.

C) Wireless signals from different devices mix together.

D) The encryption cipher stops working.

7. Which of the following is an example of personal data?

A) A computer's brand and model.

B) The size of a data packet.

C) An individual's home address and phone number.

D) A Caesar Cipher algorithm.

8. What does it mean when a data packet becomes corrupted?

A) The data is perfectly protected and safe.

B) The data is translated into plain English.

C) The data is accidentally changed, altered, or lost during transmission.

D) The data signal weakens as it passes through a solid brick wall.

9. If a hacker successfully steals your personal details and uses them to buy items with your money, what specific crime have they committed?

A) Identity fraud

B) Crosstalk

C) Attenuation

D) Identity theft

10. What protocol prefix should you look for in a web browser to ensure a website automatically scrambles your data before transmission?

A) HTTP

B) HTTPS

C) WWW

D) HTML

11. What happens to properly encrypted data if an unauthorized hacker intercepts it?

A) The data acts like a virus and damages the hacker's computer.

B) The data appears as a meaningless list of scrambled characters.

C) The data automatically deletes itself.

D) The data translates back into its original text.

C. One-Word Answers

12. What is the step-by-step mathematical method or rule used to scramble data called?

13. What is the specific term for the illegal act of stealing someone else's personal information?

14. What is the process called when you use a key to unscramble a secret code back into readable information?

15. What term describes when radio waves from different devices overlap, crash into each other, and mix up the messages being sent?

D. Match the Following

Drag the correct definition or real-world example from the pool on the right into the corresponding technical term on the left.

16. Attenuation

Drop definition here

17. Crosstalk

Drop definition here

18. Identity Theft

Drop definition here

19. Caesar Cipher

Drop definition here

20. Electricity Surge

Drop definition here

Definitions Bank

A Wi-Fi signal dropping in strength as it passes through a concrete wall.

Data corruption caused by electrical energy leaking between tightly packed cables.

A hacker secretly copying a user's ID number and email address.

Hiding a message by shifting every letter a set number of places in the alphabet.

A sudden voltage spike down a copper wire that accidentally flips a binary 1 to a 0.

E. Arrange in Proper Sequence

Order the following steps logically from first (1) to last (4).

21. Sequence for encrypting a document:

Email the protected file to your friend over the internet.

Open a new document and type out your personal, unencrypted message.

Tell your friend the password using a different communication method, like speaking to them.

Use your word-processing software to protect the document by encrypting it with a password.

22. Sequence of data corruption via an electrical surge:

An accidental bit-flip occurs, changing a binary 1 to a 0.

A sudden increase in electrical voltage strikes the networking cable.

The corrupted packet arrives at the receiving computer, presenting incorrect data.

A computer translates a message into a binary string and sends it as packets down a cable.

F. True or False

State whether the statement is True or False. If False, provide a one-sentence correction.

23. When sending an email over the internet, the message travels as one giant file.

True False

24. A bit-flip error occurs when a binary digit is accidentally altered during transmission.

True False

25. Attenuation causes the internal binary bits of a packet to change and become corrupted.

True False

26. Applying encryption physically stops a hacker from being able to steal your data packets.

True False

27. The Caesar Cipher is an example of an encryption algorithm used to scramble data.

True False

28. The prefix 'http' on a website means that the site securely encrypts your personal data.

True False

G. List Questions

29. List any three environmental issues that can cause errors in data during transmission.

30. List any two examples of personal data that should be protected online.

Student Details

A. Fill in the Blanks

B. Multiple Choice Questions

C. One-Word Answers

D. Match the Following

Definitions Bank

E. Arrange in Proper Sequence

F. True or False

G. List Questions