US 14928 DEMONSTRATE KNOWLEDGE OF BASIC CONCEPTS OF

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

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IT Technical Support NQF 4– US 14928 – Issue 3 – 01-01-202

US 14928 DEMONSTRATE KNOWLEDGE OF BASIC CONCEPTS OF TELECOMMUNICATIONS; NQF LEVEL 4, 7 CREDITS

Formative Assessments

Learner Name: Learner ID #: Learner Student Number:

Formative assessment SO 1

1. Find a facsimile booklet that explains the use of a simple facsimile with the aid of a diagram

and with reference to components, signalling and transmission of pictures. Draw a diagram of

the facsimile. Show the components on the diagram. Explain how pictures are signalled and

transmitted through the fax.


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2. Draw a diagram of a simple telephone, with three components. Indicate the components on

the diagram. Explain how the signal is sent and how your voice is transmitted.

Formative assessment SO2

3. Which topology is illustrated in Sample topology?

Sample

Topology


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4. List and describe the two fundamental architectural principles of communication networks.

5. Describe DDS

6. List the two headings under which transmission media can be classified

7. What is crosstalk?

8. What is attenuation/distortion?

9. Explain Resistance to EMI


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10. List the three predominant methods of encoding a transmission signal

11. List three advantages of a network

12. What is a LAN?

13. What is a WAN?

14. What is a workgroup?

15. Explain a client/server network

16. Explain a bus topology


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17. Explain a ring topology

18. List the five common wire media types used in network communications

Formative assessment SO3

19. Explain the meaning of packet switching

20. What is the PSTN?


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21. Explain the meaning of packet routing

22. Explain the meaning of frame relay

Final formative assessment

Specific Outcome 2: Demonstrate knowledge of the operation of a simple telephone and a basic fax

machine.

Assessment Criteria

The demonstration explains the use of a simple telephone with the aid of a diagram and with reference to components, signalling and transmission of speech.

The demonstration explains the use of a simple facsimile with the aid of a diagram and with reference to components, signalling and transmission of pictures

1. Draw a diagram of a modern telephone. Indicate the parts of the telephone on the

diagram.

7


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2. How does a concentrator digitise your voice?

4

3. Explain the basic mechanics of a modern fax

3

4. List the five ways in which a fax can be printed

5


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5. Draw a diagram to explain how pictures are signalled and transmitted through the

fax.

10

Specific Outcome 1: Demonstrate knowledge of the underlying concepts of telecommunications.

Assessment Criteria

The demonstration describes underlying concepts in simple non-mathematical terms and

with reference to their relevance to telecommunications.

Specific Outcome 3: Demonstrate knowledge of the underlying technologies used in

telecommunications.

Assessment Criteria

The demonstration describes types of modulation and the principle of multiplexing as used in telecommunication systems.

The demonstration describes concepts of impedance, termination, reflection, crosstalk, noise, and signal level, in non-mathematical terms and in relation to transmission media.

The demonstration describes the transmission media employed in telecommunications.

The demonstration compares digital transmission of data to analogue transmission.

The demonstration describes basic components and concepts of a data network, with reference to the operation of the network.


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6. Name and explain the two fundamental architectural principles of communication.

6

7. Draw a diagram of a simple point to point channel

7

8. List and explain the general headings under which transmission media can be

classified

4


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9. Explain the meaning of crosstalk

1

10. How is crosstalk minimized?

3

11. Explain the meaning of bandwidth

2

12. Complete the below table which compares AM, FM and digital.

Parameter AM FM Digital

Signal-to-Noise Ratio Low-to-Moderate

Performance vs. Attenuation Invariant

Transmitter Cost Moderate

Receiver Cost

Receiver Gain Adjustment Not Required

Installation Adjustments Requires

Multichannel Capabilities Fewer Channels

Performance Over Time

Environmental Factors

21


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13. List three advantages of networks

3

14. Explain the meaning of LAN

1

15. Explain the meaning of WAN

2

16. Explain the meaning of a workgroup

2

17. Explain a client – server network

4

18. Explain the meaning of a ring topology

4


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19. Explain the meaning of a star topology

4

20. List the five common wire media types used in network communications

5

21. Explain the meaning of infrared communication

2

22. Explain the meaning of a terrestrial microwave

2

23. Explain the meaning of a satellite system

2


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24. A twisted pair cable has two or more paired wires. The wires are given a half-twist

periodically. Explain UTP and STP

2

25. Fibre optic cable is made of a glass or plastic cylinder enclosed in a tube, called

cladding. An insulating sheath covers the core and cladding. What is carried over a

fibre optic cable?

2

26. What is the glass cladding used for?

1

Specific Outcome 4: Demonstrate knowledge of the operation and use of networks and systems in

telecommunications.

Assessment Criteria

The demonstration describes Public Switched Telephone Networks (PSTN) in terms of its operation and the services provided.

The demonstration describes data network services in terms of their operation, the services provided and the key features of each.

The demonstration describes computer networks in terms of their operation and the services provided.

27. What is the PSTN?

1

28. Explain the meaning of packet switching

4


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29. Explain what is meant by frame relay

Total 90


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SUMMATIVE ASSESSMENTS

Knowledge Questionnaire

Unit Standard 14928 Specific Outcome 2: Demonstrate knowledge of the operation of a simple telephone and a basic fax machine.

The demonstration explains the use of a simple telephone with the aid of a diagram and with reference to components, signalling and transmission of speech

The demonstration explains the use of a simple facsimile with the aid of a diagram and with reference to components, signalling and transmission of pictures.

1. What are the three main components of the simplest form of telephone? (3)

2. Give a short description of the layout of the telephone network to your home and name the wire that is used. (6)

3. Complete the sentence: In order to allow more long-distance calls to be transmitted, the frequencies transmitted are limited to a ______________ of about 3,000 hertz. (1)

4. Give a short description of how an earlier fax machine worked (4)


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5. Name four types of fax machines in terms of the way they print (4)

6. Give a short description of the “way” or path the data of a sent fax travels up to where the receiving machine receives the data. (4)

7. Draw a diagram of a modern telephone. Indicate the parts of the telephone on the diagram. (7)


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8. Explain how pictures are signalled and transmitted through a fax. (4)

9. Explain the basic mechanics of a modern fax. (3)

Specific Outcome 1: Demonstrate knowledge of the underlying concepts of telecommunications. Assessment criterion: The demonstration describes underlying concepts in simple non-mathematical terms and with reference to their relevance to telecommunications. Specific Outcome 3: Demonstrate knowledge of the underlying technologies used in telecommunications


10. What are the two fundamental architectural principles of communication networks? (2)

11. What was the purpose of layering in communication networks? (4)



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12. List and explain the general headings under which transmission media can be classified. (4)

-

13. Explain the meaning of infrared communication (2)

14. Explain the meaning of terrestrial microwave. (2)

15. Explain a satellite system. (2)

16. Explain crosstalk and how it is minimised. (4)

17. Explain the meaning of bandwidth. (2)


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18. Describe DDS. (3)


19. Give a description of a coaxial cable in terms of the materials it is made of (4)

20. What is category one twisted pair cables mostly used for? (2)

21. Give a description of the materials that fibre optic cables are made of in the order of the “layers” (4)

22. Fiber optic cable is made of a glass or plastic cylinder enclosed in a tube, called cladding. An insulating sheath covers the core and cladding. What is carried over a fibre optic cable? (2)

23. What is the glass cladding used for? (1)


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The demonstration compares digital transmission of data to analogue transmission.

24. Name the three predominant methods of encoding a transmission signal. (3)

What is the key difference between analogue and digital transmission? (1)


25. For most organizations, networking goals include: (name four) (4)

26. List three advantages of networks. (3)

27. Explain the meaning of a LAN. (1)

28. Explain the meaning of a WAN. (2)

29. Explain the meaning of a workgroup. (2)


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30. Explain a client – server network. (4)

31. Explain the meaning of ring topology. (4)

32. Explain the meaning of star topology. (4)

33. Explain the meaning of bus topology. (6)

34. What is attenuation/distortion? (2)


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35. Explain resistance to EMI. (2)

Specific Outcome 4: Demonstrate knowledge of the operation and use of networks and systems in telecommunications.


36. Give a short description of the PSTN (4)

37. Name one service that the PSTN provides (1)


38. Name two examples of packet switching networks (2)

39. Give a description of Frame relay (4)

40. Name one advantage of frame relay (1)


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41. Explain the meaning of packet switching. (4)

42. Explain the meaning of packet routing. (4)

TOTAL 132


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Evidence Locator & Sign-off

Evidence required

(Evidence required to support the practical components of the specific

outcomes & assessment criteria, expressed in the context of the

assessment)

U/S 14928

Sources of evidence

(where/how the assessor can find the evidence)

Assessor’s comments in support of judgement

(where required)

X

SO1, AC1

The demonstration describes underlying concepts in simple non-mathematical terms and with reference to their relevance to telecommunications.

SO2, AC1

The demonstration explains the use of a simple telephone with the aid of a diagram and with reference to components, signalling and transmission of speech.

SO2, AC2

The demonstration explains the use of a simple facsimile with the aid of a diagram and with reference to components, signalling and transmission of pictures.

SO3, AC1


SO3, AC2



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Evidence required

(Evidence required to support the practical components of the specific

outcomes & assessment criteria, expressed in the context of the

assessment)

U/S 14928

Sources of evidence

(where/how the assessor can find the evidence)

Assessor’s comments in support of judgement

(where required)

X

SO3, AC3


SO3, AC4

The demonstration compares digital transmission of data to analog transmission

SO3, AC5


SO4, AC1


SO4, AC2


SO4, AC3

The demonstration describes computer networks in terms of their operation and the services provided.


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SUMMATIVE WORKPLACE ASSESSMENTS

Workplace Project

1. Inspect the wire media used in your workplace and write a report on what you find. Include things such as the type of wire media for example fiber optic, coaxial etc.

2. Inspect the topology at your workplace and write a report on what you find. Motivate why you think the specific topology was chosen for your workplace and what the benefits are for using this topology.

Make sure that learner’s work shows all the above actions

Workplace Assignments

Verbal assessment

Describe the following to your facilitator:

Client/Server network and the benefits involved.

Two types of cabling used in networks

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Date Date


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Logbook 14928

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

Learner Name:

Learner Signature Date

Facilitator Name:

Facilitator Signature Date


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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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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 14928 DEMONSTRATE KNOWLEDGE OF BASIC CONCEPTS OF