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Ollscoil na hÉireann, Gaillimh GX_____
National University of Ireland, Galway
Semester II Examinations, 2008/
Exam Code(s) 1BD 2BD 1AE Exam(s) H.Dip. in Systems Analysis f/t, p/t Master of Business Studies (Electronic Commerce)
Module Code(s) MS
Module(s) Internet Technologies
Paper No. 1 Repeat Paper Special Paper
External Examiner(s) Professor Hans van der Heijden Internal Examiner(s) Professor J. F. Collins Dr. A. Nachev
Instructions: Answer three questions. All questions carry equal marks.
Duration 2 hrs No. of Answer books
Requirements : Handout MCQ Statistical Tables Graph Paper Log Graph Paper Other Material
No. of Pages Department(s)
OLLSCOIL NA hÉIREANN
THE NATIONAL UNIVERSITY OF IRELAND, GALWAY
HIGHER DIPLOMA IN SYSTEMS ANALYSIS
MASTER OF BUSINESS STUDIES (E-COMMERCE)
MS881 INTERNET TECHNOLOGIES
Time Allowed: TWO hours
Answer THREE questions. All questions carry equal marks.
Q1.
(a) Putting together a network or connecting separate networks requires devices for networking and internetworking. With respect to connecting devices answer the following questions:
i) How can the length of a network be extended? (2 Marks)
ii) What is the difference between a bridge and a repeater? (4 Marks)
iii) What is the difference between a router and a bridge? (6 Marks)
iv) Rank the connecting devices (repeater, bridge, and router) according to their complexity and give the Internet layers in which they operate. (1 Mark)
(b) There are various ways to link a network to the Internet. Describe the following types of connection discussing their features, components, equipment, advantages, and disadvantages:
i) Digital Subscriber Line (DSL) ii) Leased lines connection.
Q4.
(a) An IP address is a 32-bit address that uniquely defines a host on the Internet. With respect to IP addresses and routing techniques distinguish between each of the following pairs terms:
i) Two and three levels of hierarchy in IP addressing. ii) Class B and class C IP addresses. iii) Default mask and subnet mask. iv) Exterior routing and interior routing. (19 Marks)
(b) With respect to domain name (DNS) resolution distinguish between each of the following pairs of terms:
i) Fully Qualified Domain Name (FQDN) and Partially Qualified Domain name (PQDN) ii) Zone of authority and domain. iii) Recursive and iterative resolution. (14 Marks)
Q5.
The integrity of an organisation may be in danger if appropriate security precautions are not implemented to protect the assets.
(a) With respect to the Internet security discuss the following concepts:
i) Public-key encryption ii) Digital signature iii) Digital certificates.
Use diagrams, where appropriate, to support your answer. (18 Marks)
(b) A firewall is a safeguard used to protect networks from unauthorised access. Briefly describe a firewall components, structure and functioning.
