Unit 4

Página 1

Scenario Assignment for learners Unit 4: Computer Networks

You work for Progress IT Support in their networking division. A client, Westwood Dental Practice, is about to undertake a major reburishment of the Dental Practice and the IT systems it uses.

The Dental Practice consists of: • a reception area • a patient waiting area • a children’s play area • three treatment rooms • a staff kitchen area • a practice manager’s office • store rooms • toilets The staff in the Practice consists of: • a practice manager • 2 receptionists • 2 dental surgeons • 1 dental hygienist • 3 dental nurses

IT facilities include: • 1 PC at reception • 1 PC in the practice manager’s office • Wi-Fi throughout the practice accessed by staff • a printer in the reception area and a printer in the practice manager’s office It is planned that the refurbishment will include updating of IT facilities to include: • an on-line patient appointment booking system • 1 PC in each of the treatment rooms and 1 tablet device in each of the treatment rooms for accessing patient records and recording treatment details • Wi-Fi in the patient waiting area accessible by patients • an additional PC computer at reception • a file server for storing all practice files • backup procedures for all practice files

The network specification will need to be customised by the centre assessor to reflect changes in working practices, to consider: • stakeholder requirements i.e.: client, network user • applications • services • constraints (e.g. cost, environment, time) • security o risk assessment o Wi-Fi security o network security (e.g. firewall, MAC filtering) • purpose (e.g. file sharing, internet access, network printing) This could be done by incorporating meaningful employer involvement by an industry practitioner, providing an opportunity to make the scenario relevant to the learners’ experiences.

The tasks

Task 1 : Plan a computer network for a client (This task should take between 3 and 4 hours)

Learning Outcome 1: Understand the concept of networks, is assessed in this task. and

Learning Outcome 2: Be able to plan computer networks to meet client requirements, is assessed in this task.

Your task is to:

Explain network addressing and how it is used.

Your explanations must include how the IP address identifies a specific network, how to determine different hosts and networks that can be addressed and the function of the MAC address in transporting data between two IP hosts.

You are required to compare and contrast the OSI and TCP/IP networking models. Your comparisons must include the purpose as well as the similarities and differences between the two models. Your comparison should identify each of the network protocols (Ethernet, IP, TCP, UDP, FTP and SMTP) with each model and explain the role each protocol plays.

You are required to discuss the role of TCP/IP in networks for different topologies as listed in the teaching content. You should discuss how TCP/IP routes data between the listed network components and across different types of network. Your discussions will also include the purpose of TCP ports and the use of subnet masking.

You are required to create a network specification to meet the client’s requirement, as outlined in the scenario using different components and topologies. Assumptions relating to the scenario may be made, as necessary, and outlined in the response. The specification may have to be modified iteratively until it meets the client’s requirements.

Explain security mechanisms in computer networks. You must explain different threats to the security of your network specification you have created and then explain security systems that can be used to minimise the threat. You are required to justify security measures for inclusion in your network specification. This criterion extends the specification of P3.

You will carry out a security risk assessment for the given scenario. You are required to produce planning documentation for the implementation of the identified network solution.

You will use the network specification to create a complete network plan to meet the client’s requirements.

Pass Merit Distinction

P1: Explain how network addressing is used

M1: Compare and contrast the OSI and TCP/IP networking models

D1: Discuss the role of TCP/IP in networks

P2; Explain security considerations for computer networks

P3: Create a network specification to meet an identified client requirement

M2: Justify security measures for inclusion in an identified network solution

P4: Produce planning documentation for the implementation of an identified network solution

Evidence A report or technical guide – P1, M1, D1

This should explain network addressing and how it is used. Your explanations must include how the IP address identifies a specific network, how to determine different hosts and networks that can be addressed and the function of the MAC address in transporting data between two IP hosts.

You are required to compare and contrast the OSI and TCP/IP networking models. Your comparisons must include the purpose as well as the similarities and differences between the two models. Your comparison should identify each of the listed network protocols with each model and explain the role each protocol plays. Evidence for this could be related to the network plan.

You are required to discuss the role of TCP/IP in networks for different topologies (bus, wireless, segments, backbones). You should discuss how TCP/IP routes data between the listed network components and across different types of network. Your discussions will also include the purpose of TCP ports and the use of subnet masking. The evidence could be supported by illustrated examples showing how connectivity could be related to the network plan.

A report – P2, P3, M2

You are required to create a network specification to meet the client’s requirement. The specification may have to be modified iteratively until it meets the client’s requirements. If the scenario has been modified to cover a real client, the evidence could indicate client agreement. You are required to explain security mechanisms in computer networks. You must explain different threats to the security of the network specification that you have created and explain security systems than can be used to minimise the threat. You are required to justify security measures that you have included in your network specification. The evidence could be a clearly marked addendum to the network specification of P3 (M2).

Planning documentation – P4

You are required to produce planning documentation for the implementation of the identified network solution. You will use the network specification to create a complete network plan to meet the clien’ts requirements. Your evidence will be the planning documentation which will include any modifications required by the client. Throughout the task it is important that you correctly reference all sources used, following appropriate conventions. You are required to justify security measures that you have included in your network specification. The evidence could be a clearly marked addendum to the network specification of P3.

Task 2 : Communicating the networking solution

(This task should take between 1 and 2 hours)

Learning Outcome 3: Be able to present network solutions to clients, is assessed in this task.

Your task is to:

Propose the computer network solution that you have created to the client. You will use the network plan to prepare a visualisation of the network. (P5: Communicate the network solution to the identified client) Y

ou are required to recommend performance tools to benchmark your network solution. Your recommendation should give an explanation of what these tools do. (M3: Recommend performance tools to benchmark network solution)

Pass Merit Distinction

P5: Communicate the network solution to the identified client

M3: Recommend performance tools to benchmark network solution

Evidence Presentation with detailed speaker notes –

P5 You will be able to propose the computer network solution that you have created to the client. You will use the network plan to prepare a visualisation of the network. The evidence will be the network plans and visualisation and may be supported by a videoed presentation of you presenting the network solution.

A report or technical guide –

M3 You are required to recommend performance tools to benchmark your network solution. Your recommendation should give an explanation of what these tools do.

Task 3 : Maintaining the network

(This task should take between 1 and 2 hours)

Learning Outcome 4: Be able to plan maintenance activities for computer networks, is assessed in this task.

Your task is to:

Create a maintenance plan for the network solution that you have created. The maintenance plan should relate to the proposed solution from P5. The evidence will be the actual maintenance plan, which should consider issues as listed in the teaching content. You are required to evaluate the selection of maintenance activities identified for the network solution that you have created in P6. You should review the maintenance plan created in P6 and evaluate how the activities will support the ongoing functionality of the network.

Pass Merit Distinction

P6: Create a maintenance plan for the network solution

D2: Evaluate the selection of maintenance activities for the network solution Evidence Maintenance plan document –

P6 Create a maintenance plan for the network solution that you have created. The maintenance plan should relate to the proposed solution from P5. The evidence will be the actual maintenance plan, which should consider issues as listed in the teaching content. Report or presentation –

D2 You are required to evaluate the selection of maintenance activities identified for the network solution that you have created in P6. You should review the maintenance plan created in P6 and evaluate how the activities will support the ongoing functionality of the network. This could be presented as a report or a presentation with speaker notes, for example.

Evidence Checklist OCR Level 3 Cambridge Technicals in IT Unit 4: Computer Networks

LEARNER NAME:

For PASS have you:

(as a minimum you have to show you can meet every pass criterion to complete the unit)

Where can your tutor find the evidence? Give page no(s)/digital timings, etc.

Explained how network addressing is used

(P1) e.g. A report explaining network addressing and how it is used

Explained security considerations for computer networks

(P2) e.g. A report explaining security mechanisms in your network specification

Created a network specification to meet an identified client requirement

(P3) e.g. A report detailing your network specification to meet the client’s requirement

Produced planning documentation for the implementation of an identified network solution

(P4) e.g. Planning documentation for the implementation of an identified network solution

Communicated the network solution to the identified client

(P5) e.g. A presentation with detailed speaker notes proposing the computer network solution that you have created to the client

Created a maintenance plan for the network solution

(P6) e.g. A maintenance plan document for the network solution that you have created

For Merit have you:

Where can your tutor find the evidence?

Give page no(s)/digital timings, etc.

Compared and contrasted the OSI and TCP/IP networking models

(M1) e.g. A report comparing and contrasting the OSI and TCP/IP networking models

Justified security measures for inclusion in an identified network solution

(M2) e.g. A report justifying security measures for inclusion in the network specification that you have created

Recommended performance tools to benchmark the network solution

(M3) e.g. A report recommending performance tools to benchmark your network solution

For Distinction have you:

Where can your tutor find the evidence?

Give page no(s)/digital timings, etc.

Discussed the role of TCP/IP in networks

(D1) e.g. A report discussing the role of TCP/IP in networks for different topologies

Evaluated the selection of maintenance activities for the network solution

(D2) e.g. A report or presentation evaluating the selection of maintenance activities identified for the network solution that you have created