Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Attack Types - Communications Network Engineering - Exam, Exams of Materials science

University of AllahabadMaterials science

Main points of this past exam are: Attack Types, Mechanisms, Different Approaches, Provide Reliable Data, Perspective, Control Signalling, Routing and Processing

Typology: Exams

2012/2013

Uploaded on 03/30/2013

lalitchndra
lalitchndra 🇮🇳

4.5

(12)

146 documents

1 / 3

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Cork Institute of Technology
Master of Engineering in Telecommunications Engineering -
Award
January 2007
(NFQ - Level 9)
Communications Network Engineering
(Time: 2 Hours)
Answer any three questions for full marks
Maximum available marks is 100.
NOTE: The exam is Open Book and you
may use all of your lecture notes
Examiners: Dr. S. McGrath
Mr. P. French
Mr. A. Murphy
Mr. A. McDonald
Dr. D. Pesch
Q1.
(a) Explain two mechanisms that SS7 uses to provide reliable data transfer between network
elements. Discuss the need for the two different approaches.
[7.33 marks]
(b) Explain from a routing and control signalling perspective how a call to an 1850 number is
established through an SS7 network. As part of your answer list the functional elements of an
SS7 network that are involved in the routing and processing.
[10 marks]
(c) Explain with the help of a diagram how, based on the SIP signalling protocol, a VoIP call is
setup via a proxy between two terminals on the Internet.
[9 marks]
(d) Explain briefly the motivation for the major telecommunication service providers in offering
telecommunication services over the Internet Protocol. As part of your answer also list and
briefly discuss the different approaches that are currently standardised for managing and
controlling such services.
[7 marks]
[Total: 33.33]
pf3

Partial preview of the text

Download Attack Types - Communications Network Engineering - Exam and more Exams Materials science in PDF only on Docsity!

Cork Institute of Technology

Master of Engineering in Telecommunications Engineering -

Award

January 2007

(NFQ - Level 9)

Communications Network Engineering

(Time: 2 Hours)

Answer any three questions for full marks Maximum available marks is 100.

NOTE: The exam is Open Book and you may use all of your lecture notes

Examiners: Dr. S. McGrath Mr. P. French Mr. A. Murphy Mr. A. McDonald Dr. D. Pesch

Q.

(a) Explain two mechanisms that SS7 uses to provide reliable data transfer between network elements. Discuss the need for the two different approaches. [7.33 marks]

(b) Explain from a routing and control signalling perspective how a call to an 1850 number is established through an SS7 network. As part of your answer list the functional elements of an SS7 network that are involved in the routing and processing. [10 marks] (c) Explain with the help of a diagram how, based on the SIP signalling protocol, a VoIP call is setup via a proxy between two terminals on the Internet. [9 marks]

(d) Explain briefly the motivation for the major telecommunication service providers in offering telecommunication services over the Internet Protocol. As part of your answer also list and briefly discuss the different approaches that are currently standardised for managing and controlling such services. [7 marks] [Total: 33.33]

Q.

(a) Given is a small network of four routers modelled by a queuing network as shown in the figure below. The parameters of the model are given as follows: r 1 = 2/sec, all other r (^) i = 0. p 12 = 1.0, p 32 = 0.5, p 34 = 0.5, p 43 = 1.0, all other pij = 0. Calculate the arrival rates λi, i = 1, 2, 3, 4, into each router and then determine the service rates μi , i = 1, 2, 3, 4, such that the average waiting time in each queue does not exceed Wi = 1.0sec and throughput is maximised.

μ 1 μ (^2)

μ 3 μ (^4)

r 1 p^12

p 34

p^32 p (^43)

[18 marks] (b) Using the Ford-Fulkerson algorithm, calculate the maximum flow f between source node s = 1, and destination node d = 4 for the network of 7 nodes shown in the figure below. Link capacities and flow direction are shown with each link.

20

10 5

7

5

(^3 )

(^15 )

20

7

[15.33 marks] [Total: 33.33 marks]