data communications and networks 2011 06 27

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Unit / Module U-08 Data Communications and NetworksAssessment Assignment 1Lecturer Dr Udayanga HemapalaStudent Name ID HNDELIMT/03/ -Date Handed Over 27th June 2011 Date Due 04th July 2011

Initial Submission Date Re-SubmissionDateQ "0 Criteria Met?. . . . ~ Grading. . . . . . . . Assessor Feedback= 1;.0 Q. On. . . . ! 3 Opportunity"0 , . ! ; : d ~ Initially= tJ . . . . Resubmission. . . . . . . . . . .

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Please read, follow and reference both the contents of the unit outline and the gradingcriteria of the assignment before completing this assignment .


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Plagiarism:

While research and discussion are an essential part of an assignment, the deliberate copying ofsomeone else's work or unacknowledged copying from printed or electronic sources is NOTpermitted. You may be subject to disciplinary procedure if you do this. You should sign thissheet to show that you comply with these regulations.

Student's Signature: .Student's Comments:

Date: .

Assessment has been internally verified for use.

Internal Verifier Name: Prof Sisil KumarawaduApproved By 24 June 2011Signature: Date Verified :Prof Sisil Kumarawadu

Data communication and Networks: Ass 01 2 International College of Business and Technology


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Task I (PI-I, PI-2, Pl-3, M3)Answer the following questions

1. Give some advantages and disadvantages of combining the session, presentation, and applicationlayer in the OS1 model into one single application layer in the internet model.(Pl-l)

2. Dialog control and synchronization are two responsibilities of the session layer in the OS1 model.Which layer do you think is responsible for those duties in the internet model? Explain youranswer.(Pl-2)

3. Translation, encryption, and compression are some of the duties of the presentation layer in theOS1 model. Which layer do you think is responsible for these duties in the Internet model?Explain your answer.(p1-2)

4. There are several transport layer models proposed in the OS1 model. Find all of them. Explain thedifferences between them.(Pl-3)

5. There are several network layer models proposed in the OS1 model. Find all of them. Explain thedifferences between them.(Pl-3)

You must do a short presentation about a selected question by the examiner from the above list. You needto come prepared for all of the above questions.(You must cite the references such as book, web address for each answer)Task 2 (DI, D2)

1. Using the layer models, describe the ordering and delivery of a pizza, indicating the interactionsat each level. (You must describe all the activities that take place at the sender, on the way and atthe receiver. Figures should be used to explain the layer models)

2. The French and Chinese prime ministers need to come to an agreement by telephone, but neitherspeaks the other's language. Further, neither has on hand a translator that can translate to thelanguage of the other. However, both prime ministers have English translators on their staffs.Draw a diagram to depict the situation, and describe the interaction at each leveL(You must explain your answers during the viva session. Viva session is compulsory topass theassignment)

Data communication and Networks: Ass 01 International College of Business and Technology


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Grading ClassificationPass Grade: Pass Grade is achieved by meeting all following Grade Descriptors

Grade Code: Grade Descriptors Examples! IndicativeCharacteristics

PI: Investigate dataPI-I: explain the differing types of data Task I should be

Communication communication networks and their applications completednetworks and the Pl-2: describe the concept of the ISO openrequirement for open systems interconnect (OSI) reference modelPl-3: describe standard protocol suites and howsystems they relate to the OSI reference model

P2-1 :describe the data transmission methods Mid-term examP2: Investigate the used for information interchangeP2-2: explain the principles of synchronousmethods employed for and synchronous transmissiondata communication P2-3: describe the strategies for controlling

errors in data networksP3-1: describe commonly used LAN Mid-term examtopologies and transmission media

P3: Investigate local P3-2: describe the commonly used mediaaccess control methods for LANsarea networks P3-3: describe the IEEE 802 standards forLAN ClassificationP3-4: explain the function of LAN hardwareP4-1: describe the features ofwide area Assignment 02networks (WANs)

P4: Investigate wide area P4-2: explain the switching and packetnetworks and internet techniques used inWANsworking P4-3: describe how routing is achievedP4-4: describe the methods used for datacommunicationover the PSTN



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Merit Grade:

Merit descriptors Indicative characteristics Contextualized EvidenceIn order to achieve a The learner's evidence shows:merit the learnermust:

To achieve the grade youwill need to:

M l identify and applystrategies to "findappropriatesolutions

effective judgments have been made@ complex problems with more thanone variable have been explored an effective approach to study andresearch has been applied

M2 select/design andapply appropriatemethods/techniques

e relevant theories and techniques havebeen applied

e a range of methods and techniqueshave been applied

1 & a range of sources of information hasbeen used

e the selection of methods andtechniques/sources has been justifiedthe design of methods/techniques hasbeen jus t if ied

'& complex information/data has beensynthesized andappropriatemethods/techniquesapplied

processedlearning

have beenM3 present and

communicateappropriatefindings

and Present the answer of theselected question (Task 01)

the appropriate structureapproach has been usedo coherent, logical development ofprinciples/concepts for the intendedaudience

III a range of methods of presentationhave been used and technicallanguage has been accurately used

& communication has taken place infamiliar and unfamiliar contexts

e the communication is appropriate forfamiliar and unfamiliar audiencesand appropriate media have beenused

Data communication and Networks: Ass 01

by the examiner during the. .VIva seSSIOn

International College of Business and Technology


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edexcela dv an cin g lea rn in g, ch an gin g liv esBTEC HND in Electrical and Electronic Engineering

Distinction descriptors Indicative characteristicsContextualized Evidence

In order to achieve adistinction the learner The learner's evidence shows:must:

To achieve the grade youwill need to:

D 1 use critical reflectionto evaluate own workand justify validconclusions

D2 take responsibility formanaging andorganizing activities

3conclusions have been arrived atthrough synthesis of ideas andhave been justified* the validity of results has beenevaluated using defined criteriae self-criticism of approach hastaken place

o realistic improvements have beenproposed against definedcharacteristics for success

$autonomy/independence has beendemonstrated

e substantial activities, projects orinvestigations have been planned,managed and organized

$ activities have been managede the unforeseen has beenaccommodated

the importance ofinterdependence has beenrecognized and achieved

Demon st ra te t ha t c rit ic ism ha staken place by performingTask 2

Demonstra te the independenceby performing T ask 2

D3 Demonstrateconvergent/lateral! ereati ve thinking

3 ideas have been generated anddecisions taken

e self-evaluation has taken placee convergent and lateral thinkinghave been applied

e problems have been solved.. innovation and creative thoughthave been applied

receptiveness to new ideas ISevident

effective thinking has taken placein unfamiliar contexts



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Grading Matrix

Ml M2 M3 Dl D2 D3

Assignment 1 ./ ./ ./

Mid-term exam ./ ./ ./

Assignment 2 ./ ./ ./ ./ ./ ./

Data communication and Networks: Ass 01

data communications and networks 2011 06 27

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