Communication Systems & Networks Exam for IT, Computer, Network, & Media Tech Students, Exams of Electrical Engineering

Download Communication Systems & Networks Exam for IT, Computer, Network, & Media Tech Students and more Exams Electrical Engineering in PDF only on Docsity! S161 01/10/2004 THE MANCHESTER METROPOLITAN UNIVERSITY FACULTY OF SCIENCE AND ENGINEERING DEPARTMENT OF ENGINEERING AND TECHNOLOGY SESSION 2003/2004 Examination for the BSc (HONS) INFORMATION TECHNOLOGY BSc (HONS) COMPUTER AND NETWORK TECHNOLOGY BSc (HONS) MEDIA TECHNOLOGY BSc COMBINED HONOURS YEAR/STAGE TWO UNIT 64EE2052 : COMMUNICATION SYSTEMS AND NETWORKS Tuesday 1 June 2004 9.30 am to 12.30 pm Instructions to Candidates Answer FIVE questions. ALL questions carry equal marks. Students are permitted to use their own calculators subject to the standard Faculty conditions. continued 1 1. (a) Show using a suitably labelled diagram the typical format for a standard IEEE 802. 3 Ethernet frame, and explain the purpose of each of the constituent fields within the frame. [10] (b) Explain with the aid of diagrams the effects of: (i) noise ; AND (ii) bandwidth limitations on a transmitted digital data stream. [6] (c) State methods used to minimise the problems created by these two effects in a practical data communication system. [4] continued 4 5. (a) Describe the structure of an IP address. Provide a description of the THREE main classes of IP addresses and state the types of organisations that normally adopt these addresses. [10] (b) When planning a network some administrators may adopt a network mask. Explain how this works and why it may be preferable to a single set of IP addresses. [4] (c) For the following IP addresses and network masks determine which are valid and state the appropriate subnet number and host number. IP Address Subnet Mask 192.168.56.124 255.255.255.224 192.138.56.124 255.255.255.192 [6] 6. (a) Explain the purpose of a ‘Next Hop’ table with respect to datagram transmission. [4] (b) For the following schematic network diagram derive the appropriate Next Hop table. [10] (c) Discuss in which instances it could be more effective to use ‘manually created’ tables and in which instances tables could be created automatically. [6] 5 S161 01/10/2004 7. (a) Explain how domain names are structured and give examples of different levels of domain names. [6] (b) Describe in detail how domain names resolution is performed and list the specific processes involved. [10] (c) Describe the formal process of registering a domain name. [4] 8. (a) Routers make decisions on the packet route through the Internet on the basis of performance criteria or ‘cost’. State different factors that could determine the cost of a communication link. Describe the principle of the shortest path routing algorithm implemented in Dijkstra’s algorithm. [8] (b) From the following sets of coordinates derive the network graph and demonstrate the use of Dijkstra’s algorithm showing ALL stages in your development. Node Costs to vertices a (3 : b) (7 : d) (12 : e) b (6 : c) (2 : d) c (7 : d) (1 : e) d (6 : e) [12] END