Institute of Technology, Carlow

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No:273s







Institute of Technology, Carlow

School of Science

Department of Computing & Networking

Summer 2010 Examinations





Course Code:

KCITYB (CW218)





Course Title:

BSc
(Hons) in Computing & IT Management




Course Year:

4





Subject:

Multimedia Systems








Date:

07/05 PM




Duration:

2 hours





Examiners:

Mr P Loughlin



Mr A McDonald



Dr C Horn





Special Requirements:




Instructions to
Candidate:




1.

Write your Name, Course, Course Year and Class Group on your answer book.

2.

Answer any
THREE
questions.

3.

Marks as indicated in brackets. All questions carry equal marks.

4.

Start each question on a new page. Maximum marks 90



Question

1

A)

The multimedia capabilities of mobile phone technologies continue to increase over time.

Explain the differences between 1G, 2G 2.5G and 3G mobile phone technologies that allow this increased
use of multimedia usage to happen.


(16 Marks)



B)

Long Term Evolution

(LTE) is an important technology in the development of 4G technologies.

Briefly explain what you understand by the term Long Term Evolution

and why it is important for the
delivery of multimedia content over mobile phones
.


(4 Marks
)



C)

Increasingly we use mobile phones to access “Social Networking Sites”.



1.

What is meant by the term “Social Networking”?

Give examples to support your answer.


(5 Marks)


2.

Has “Social Networking” got any commercial possibilities?

Give examples to supp
ort your answer.


(5 Marks)





Question 2

A)

Streaming and Downloading are two ways to provide

audio, video, or other time
-
b
ased
multimedia content on the Internet.

Briefly describe these two delivery methodologies and clearly show the difference between
them.

(8 Marks)



B)

A standard web server

is not a good delivery mechanism for multimedia on the W
eb
. Briefly
explain why this is so and outline the HTTP actions involved in delivering a file.

(7 Marks)



C)

Explain how the delivery of multimedia content
can be improved by the introduction of a “Meta
File”.

(3 Marks)



D)

Using a diagram, outline the general structure of a streaming media server. Your diagram should
indicate the protocols used to perform the various functions involved.

(12 Marks)





Quest
ion 3

A)

The organisation that you work for has two offices in different locations. One office is in a town
centre location in Carlow and the other in is a very remote rural location in the west of Ireland. You need
Broadband Internet access in both office
s and it is your job to organise it.

Obviously because of the differences in the types of location different technologies might be more
suitable that others and some might not be applicable at all.

Outline what you think the possible options might be and w
hy you think they might be suitable.

(20 Marks)


B)

ADSL has evolved as the predominant technol
ogy for the delivery of
Broadband over the local
loop. Briefly describe the techniques used that allow ADSL to deliver such an increase in available
bandwidth wh
ile still using the same twisted pair wires that make up the local loop.

(10 Marks)



Question 4

A)





It can be seen from the diagram above that the protocols developed for multimedia
delivery tend to be implemented over UDP rather that TCP.

Explain why

this is the case.

(5 Marks)


B)

What is meant by the term “Quality of Service” within the context of delivery of multimedia over
a network?

(5 Marks)


C)

Fully explain how the resource reservation protocol (RSVP) works.

(10 Marks)


D)

Fully explain how Di
ffServe differs from IntServ in its approach to handling data.

(10 Marks)