VOIP - Computer Networks - Old Exam Paper, Exams of Computer Networks

Download VOIP - Computer Networks - Old Exam Paper and more Exams Computer Networks in PDF only on Docsity! Cork Institute of Technology Bachelor of Science in Computing in Information Technology Support (ACCS)- Award (NFQ Level 7) Summer 2007 Computer Networks III (Time: 3 Hours) Answer any FOUR questions Examiners: Ms. J. Walsh All questions carry equal marks Mr. J. Greenslade Ms. T. Murphy Question 1 (a) Explain the 3 layers in the hierarchical network design model. (5 marks) (b) Give an explanation of the characteristics of a scalable network. (5 marks) (c) Give a brief explanation of two of the following remote access networking options: Broadband, Satellite, ISDN, PPP, DSL, Wireless. (8 marks) (d) Explain the differences between link-state and distance vector routing. (7 marks) 2 Question 2 (a) OSPF interfaces can be in one of seven states and OSPF neighbour relationships progress through these states, one at a time. Explain the 7 states. (9 marks) (b) Given the following diagram, write out the OSPF configuration required on each router. (6 marks) (c) A DR and BDR must to be elected on OSPF multi-access broadcast links. How are they selected? Why is it necessary to elect a DR and a BDR? (6 marks) (d) How is the router ID determined in OSPF? (4 marks)