US 14947 DESCRIBE DATA COMMUNICATIONS; NQF LEVEL 3, 4

Portfolio of Evidence: IT Tech Support NQF 4: SAQA ID 78964

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IT Technical Support NQF 4– US 14947 & US 14932 – Issue 3 – 01-01-2021

US 14947 DESCRIBE DATA COMMUNICATIONS; NQF LEVEL 3, 4 CREDITS

US 14932 DESCRIBE SYNCHRONOUS/ ASYNCHRONOUS COMMUNICATION WITH COMPUTERS; NQF LEVEL 4, 7 CREDITS

Formative Assessments

Learner Name: Learner ID #: Learner Student Number:

Formative Assessment

Individual self-assessment

1. Name four common wire media types used in network communications

2. Define a network address

3. For two PCs to communicate, what must they have:


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4. Explain the difference between full duplex and half duplex data transmission

5. Explain the following networks:

a. Directory based

b. Domain based


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c. Client-server

6. How does wireless media communicate?

Work in groups

In a group discuss the article from .Net magazine. Make notes for yourself about the following:

The simplest way to set up a wireless network

What a base station is

HomeRF

Wi-Fi

Bluetooth

7. Write a short essay about the development of PC’s from the 1970’s to the introduction of

ShareNet.


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Formative Assessment SO2


1. Explain the difference between synchronous and asynchronous data.



1. Describe the following types of telephone lines:

a. Analogue


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b. Digital

c. Channel Service Units/Data Service Units

2. Explain circuit switching, including how a connection is established

3. Explain packet switching

4. What is connectionless or datagram packet switching?

5. There are two forms of virtual circuits. Name and explain them

6. There are two classes of ISDN. Name and explain them


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1. Discuss the interface of the physical layers

2. What is a protocol?

3. List the 3 most widely used protocols suites are:


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4. Which factors should you consider when choosing a protocol?

Final Formative Assessment


Specific Outcome 1: Describe past, present and emerging developments in data communication.

Assessment Criteria

The description explains the origin of current data communications with an outline of past developments.

The description provides taxonomy for current systems.

The description identifies and projects trends from emerging developments in data

communications.

1. What happened in the computer world in the 1970’s?

1

2. During which decade were portable PC’s introduced?

1

3. Explain a workgroup

6


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4. Explain a client/server network

2

5. Explain a domain-based network

2

6. Explain how data moves during data communication and how data communication is managed and controlled with the OSI model.

4

7. Explain full duplex data transmission

1

8. Explain half-duplex data transmission

1

9. What must two PC’s have in order to communicate?

3


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10. List five common wire media types used in network communications

5

11. List three types of wireless media

3

12. Explain terrestrial microwave

2

13. Explain a satellite system

3

14. Answer the following questions out of the article from .Net: what is the simplest way to set up a wireless network

1

15. What is a base station also known as?

1


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16. What is homerf designed for?

1

17. What is Wi-Fi designed for?

1

18. What is Bluetooth designed for?

1

Specific Outcome 2: Describe synchronous and asynchronous data communications

Assessment criteria

The description outlines the characteristics of each form of data communication.

The description explains the features of data communication equipment with respect to

synchronous and asynchronous data communication.

19. How does a parallel port send and receive data?

2

20. How does synchronous communications work?

2

21. Are serial ports synchronous or asynchronous devices?

1

22. Explain Asynchronous communication

3


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U/S 14932 Specific Outcome 3: Describe communication with computers using telephone

networks.

Assessment Criteria

The description distinguishes types of telephone network services and outlines their features and costs.

The description outlines the functions of telephone network components.

The description outlines the types of problems encountered in digital transmission.

The description outlines the options available as distance increases. .

23. Explain a dial up line

3

24. List the two types of dedicated or leased lines

2

25. List the two types of switched networks

2


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26. Explain the meaning of circuit switching

6

27. Explain the meaning of packet switching

3

28. List the two categories of packet switching

2

29. Explain the meaning of attenuation.

1

30. Explain the meaning of EMI.

1

31. What does ISDN stand for?

1


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Specific Outcome 4: Describe asynchronous and synchronous communication with computers.

Assessment Criteria

The description outlines the interface of the physical layer for synchronous and asynchronous communication.

The description outlines the application and operation of protocols.

The description outlines the delays incurred in transmissions.

The description outlines the operation of link control protocols.


1

33. What do the following stand for? TCP/IP, IPX/SPX, NetBEUI

3

34. List the four factors to consider when choosing a protocol

4

Total 77


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SUMMATIVE ASSESSMENTS

Knowledge Questionnaire

Unit Standard 14947 Specific Outcome 1: Describe past, present and emerging developments in data communication

The description explains the origin of current data communications with an outline of past developments

1. Networks developed because of certain needs. What were those needs? (1)

2. The first type of PC LAN was ShareNet. Which company developed ShareNet? (1)

3. Complete the sentence: A workgroup is also known as a _________________ network. (1)

4. True or False: In a client/server network, network administrators are responsible for user access and network resources. (1)

5. Give a short description of a domain based configuration. (2)

The description provides a taxonomy for current systems.

6. What does OSI stand for? (1)

7. Give a holistic description of the function of the OSI model. (7)


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8. True or False: In the OSI model, before data can be passed down from one layer to the next, it is broken into smaller units of information called packets. (1)

9. Name the seven different layers of the OSI model (7)

10. Give a description of the word node. (1)

11. Describe the functions of the session layer in the OSI model (6)


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12. Give a description of the IEEE standards as a whole. (3)

13. Give a short description of full-duplex data transmission. (3)

14. Name two different types of addresses that computers can have on a network. (2)

15. Complete the sentence: Each PC must also have a network-compatible operating system. Installed with the operating system will be one or more ________________ protocols. (1)

16. Name the most common types of wire media used in networks. (3)

17. Complete the sentence: Wireless media is sometimes referred to as _____________ media. (1)

The description identifies and projects trends from emerging developments in data communications.

18. True or false: a wireless base station uses radio waves to communicate. (1)

19. Complete the sentence: Bluetooth runs out of steam at ______m. (1)


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Specific Outcome 2: Describe synchronous and asynchronous data communications.


20. Complete the sentence: A parallel port sends and receives data ________ bits at a time over 8 separate wires. (1)

21. How many bits can a serial port send and receive at a time, using how many wires? (2)

The description explains the features of data communication equipment with respect to synchronous and asynchronous data communication.

22. In terms of synchronous and asynchronous, complete the sentence: When the receiver of a signal carrying information has to derive how that signal is organized without consulting the transmitting device, it is called ___________________ communication. (1)

23. Give a description of synchronous communication (5)

TOTAL 52


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Declaration of Authenticity Of Evidence

I (Initials and Surname)

ID No:

declare/certify that the learning activities completed in the Learner Activity Workbook in its entirety is my own original and authentic work (interpreter declaration to be completed where necessary) I acknowledge that should it come to the attention/reported to the Training Provider/ SETA or relevant authorities, and there is sufficient evidence to prove that there is an irregularity regarding the authenticity of this submission the necessary steps will be taken against me which can result in one or more of the following decisions being taken:

A criminal case being opened,

Learner achievement certificate cancelled, withdrawn

Non processing of Learner Achievement submissions to the SETA pending the outcome of an investigation

De-registration as an Assessor/Moderator (where unauthorised assistance is provided by the Assessor/Facilitator)

Investigation into the accreditation status of the Training Provider if there is an irregularity on the part of the Training Provider

I know and understand the contents of this declaration: I have no objection to signing the prescribed declaration. The declaration was also explained to me by the Training Provider/Facilitator

Signature of Learner: Date

Signature of Facilitator/Assessor: Date


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Formative Assessment


1. Name 4 common wire media types used in network communications

2. Define a network address

3. For two PCs to communicate, what must they have?

4. Explain the difference between full duplex and half duplex data transmission

5. Explain the following networks:

a. directory based


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b. Domain based

c. Client-server

6. How does wireless media communicate?


Individual Self-Assessment

1. Explain the difference between synchronous and asynchronous data.


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1. Describe the following types of telephone lines

a. Analogue

b. Digital

c. Channel Service Units/Data Service Units

2. Explain circuit switching, including how a connection is established


4. What is connectionless or datagram packet switching?

5. There are two forms of virtual circuits. Name and explain them


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6. There are two classes of ISDN. Name and explain them



1. Discuss the interface of the physical layers


3. List the3 most widely used protocols suites are:

4. Which factors should you consider when choosing a protocol?


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Final Formative Assessment



Assessment Criteria


The description provides taxonomy for current systems.

The description identifies and projects trends from emerging developments in data

communications.

1. What happened in the computer world in the 1970’s?

1

2. During which decade were portable PC’s introduced?

1

3. Explain a workgroup

6

4. Explain a client/server network

2


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5. Explain a domain-based network

2

6. Explain how data moves during data communication and how data communication is managed and controlled with the OSI model.

4

7. Explain full duplex data transmission

1

8. Explain half-duplex data transmission

1

9. What must two PC’s have in order to communicate?

3

10. List five common wire media types used in network communications

5

11. List three types of wireless media

3


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12. Explain terrestrial microwave

2

13. Explain a satellite system

3

14. Answer the following questions out of the article from .Net: what is the simplest way to set up a wireless network

1

15. What is a base station also known as?

1

16. What is homerf designed for?

1

17. What is Wi-Fi designed for?

1

18. What is Bluetooth designed for?

1

Specific Outcome 2: Describe synchronous and asynchronous data communications

Assessment criteria


The description explains the features of data communication equipment with respect to


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synchronous and asynchronous data communication.

19. How does a parallel port send and receive data?

2

20. How does synchronous communications work?

2

21. Are serial ports synchronous or asynchronous devices?

1

22. Explain Asynchronous communication

3

U/S 14932 Specific Outcome 3: Describe communication with computers using telephone

networks.

Assessment Criteria




The description outlines the options available as distance increases. .

23. Explain a dial up line

3

24. List the two types of dedicated or leased lines

2


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25. List the two types of switched networks

2

26. Explain circuit switching

6


3

28. List the two categories of packet switching

2

29. Explain the meaning of attenuation

1

30. Explain the meaning of EMI

1

31. What does ISDN stand for

1


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Assessment Criteria






1

33. What do the following stand for? TCP/IP, IPX/SPX, NetBEUI

3

34. List the four factors to consider when choosing a protocol

4

Total 77


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SUMMATIVE ASSESSMENTS

Knowledge Questionnaire



The description provides a taxonomy for current systems.

The description identifies and mentions trends from emerging developments in data communications.

1. What is distributed processing? (1)

2. What was the first type of PC LAN called? (1)

3. What is the difference between a LAN and a WAN? (2)

4. Explain a peer to peer network (2)

5. Explain a client/server network (1)

6. Explain a domain based network (1)


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7. What does half-duplex data transmission mean? (1)

8. What does full-duplex data transmission mean? (1)

9. List three types of wireless media (3)

10. Explain the application of HomeRF, Wi-Fi and Bluetooth. (3)

Specific Outcome 2: Describe synchronous and asynchronous data communication.


The description explains the features of data communications equipment with respect to synchronous and asynchronous data communication.

11. How does a parallel port send data? (1)

12. What are parallel ports used for? (1)

13. How does a serial port send data? (1)


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14. Explain synchronous communication (2)

15. Explain asynchronous communication (2)

16. What does ATM stand for? (1)

17. Which method of communication does the PS2 port on a PC use? (1)

18. Does the keyboard use synchronous or asynchronous communication? (1)

Specific Outcome 3: Describe communication with computers using telephone networks




The description outlines the options available as distance increases.

19. Explain a dial up line (1)


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20. Explain a dedicated line (2)

21. Why is digital technology preferable to analogue technology? (1)

22. Explain circuit switching (6)

23. Explain packet switching (3)

24. Name and explain two forms of virtual circuits. (4)


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Specific Outcome 3: Describe communication with computers using telephone networks




The description outlines the options available as distance increases.

25. Name and explain two classes of ISDN and for which market they are intended. (6)

,

26. Explain attenuation (2)

27. Explain EMI as well as what causes it. (5)

28. How can you avoid it. (2)




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29. Explain DTE and DCE and give an example of DCE (5)

30. How can interfaces between DTE and DCE be categorised? (4)

31. Explain each of the above categories (4)


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32. Explain RS-422 cable lengths (2)

33. Explain RS-232 signal lengths (1)

34. Explain General Purpose Interface Bus (GPIB) (18)


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35. Explain fibre optic cables (8)

36. Name the biggest advantage of fibre optic (1)

37. Explain bit-oriented transmission (3)

38. What is a protocol? List the three most widely used protocol suites. (4)


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39. What is a protocol stack? (1)

Discuss the three protocol suites in terms of configuration and administration (6)

40. Discuss the three protocol suites in terms of performance (11)

TOTAL 125


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Practical Workplace Logbook

Attach the completed workplace logbook and workbook behind this page

Acknowledgment of Receipt

I ____________________________________________________________________________

(Learner) acknowledge receipt of my Workplace assignment workbook on this the

_______ Day of _______________________________ 20______

The process of on-the-job training has been explained to me.

___________________________________

Signature of Learner

_____________________________________________________________________________

Name of Facilitator/Mentor/Supervisor:

__________________________________

Signature of Facilitator/Mentor/Supervisor

Indirect Evidence

Indirect Evidence is evidence produced about the learner from another source. This is usually in the form of reports of third party sources, i.e. sources other than the assessor.

Indirect evidence can be used to verify the authenticity of other forms of evidence. In addition, it may be necessary to corroborate these forms of evidence.

Sources of indirect evidence include:

Team outputs

Work completed at an earlier stage

Performance appraisals

Training records

Testimonials

Reviews and commendations

Certificates and qualifications

Medals, prizes and trophies

Customer / client ratings

Please attach any indirect evidence you may have on the required outcomes within the PoE behind this page.


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SUMMATIVE WORKPLACE ASSESSMENTS

Workplace Assignments

Work sample 14932 & 14947

Do research about the origins of data communications that we use today and the developments from the past that led to where we are now. Write an essay about the history of data communications to the present date. Include extracts and pictures from your sources.

In your essay you have to explain the taxonomy of the data communication systems used in South Africa today

Explain and described the different telephone network services found in SA. Explain the functions of the different telephone network components.

You have to compare their features and costs in the form of a table

Describe the problems typically found during digital transmission of data

Explain the different options that are available to users as the distance increases

What developments are emerging and what can we expect in the future regarding data communications?

Make sure that learner’s work clearly shows all the information that is required.

Attach evidence of the work after this page

Verbal assessment 14932 & 14947

You have to answer the following questions verbally. Your facilitator will note your replies and assess you according to the table provided.

Actions: did the learner Y N Make short notes of learner’s answers

Describe the characteristics of synchronous data communication

Describe the features of synchronous data communication

Describe the characteristics of asynchronous data communication

Describe the features of asynchronous data communication

Describe the interface of the physical layer for synchronous communication

Describe the interface of the physical layer for asynchronous communication

Describe the application and operation of protocols for synchronous communication

Describe the application and operation of protocols for synchronous communication

Describe delays that occur during transmission of data


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Describe the operation of link protocols

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Date Date


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Logbook 14947

Date Assignment No Start Finish Total Hours

e.g.

12/9/2021 1 10:00 14:00 4

Date Learner Signature Date Mentor/Supervisor Signature


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Logbook 14932

Date Assignment No Start Finish Total Hours

e.g.

12/9/2020 1 10:00 14:00 4

Date Learner Signature Date Mentor/Supervisor Signature

Learner Name:

Learner Signature Date

Facilitator Name:

Facilitator Signature Date

Please attach extra evidence after each section and practical’s through screen shots


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Declaration of Authenticity of Evidence

I (Initials and Surname)

ID No:

declare/certify that the learning activities completed in the Learner Activity Workbook in its entirety is my own original and authentic work (interpreter declaration to be completed where necessary) I acknowledge that should it come to the attention/reported to the Training Provider/ SETA or relevant authorities, and there is sufficient evidence to prove that there is an irregularity regarding the authenticity of this submission the necessary steps will be taken against me which can result in one or more of the following decisions being taken:

A criminal case being opened,

Learner achievement certificate cancelled, withdrawn

Non processing of Learner Achievement submissions to the SETA pending the outcome of an investigation

De-registration as an Assessor/Moderator (where unauthorised assistance is provided by the Assessor/Facilitator)

Investigation into the accreditation status of the Training Provider if there is an irregularity on the part of the Training Provider

I know and understand the contents of this declaration: I have no objection to signing the prescribed declaration. The declaration was also explained to me by the Training Provider/Facilitator

Signature of Learner:

Date

Signature of Facilitator:

Date


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Date

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Basic Conditions of Employment Act, 1997 Record of Time Worked

Employee Name: ________________________________________________________

Employee Surname: ______________________________________________________

Employee ID Number: ____________________________________________________

Employee Signature: _____________________________________________________

Employer Name: _________________________________________________________

Employer Signature: ______________________________________________________

Year: 2021

Month: _______________________________________

Total hours worked / productive capacity made available during the month: 160 hours

Work completed:

Time spent on training including classroom training and/or digital learning as well as

study and revision time;

X

Time spent on completing work and digital work tasks (including availability for work); X

Time spent on compiling assessments (formative and summative) for your PoE; X

Time spent on task preparation & research X

Time spent travelling to and from location for task completion X

Documents

US 14947 DESCRIBE DATA COMMUNICATIONS; NQF LEVEL 3, 4