Computer Networks - 2005 2006 Exam - Electrical Engineering, Exams of Electrical Engineering

Download Computer Networks - 2005 2006 Exam - Electrical Engineering and more Exams Electrical Engineering in PDF only on Docsity! THE MANCHESTER METROPOLITAN UNIVERSITY FACULTY OF SCIENCE AND ENGINEERING DEPARTMENT OF ENGINEERING & TECHNOLOGY SESSION 2005/2006 Examination for the BSc (HONS) INFORMATION TECHNOLOGY BSc (HONS) MEDIA TECHNOLOGY BSc (HONS) COMPUTER & NETWORK TECHNOLOGIES YEAR/STAGE THREE UNIT 64EE3038 : COMPUTER NETWORKS Monday 22 May 2006 9:30 am to 12:30 pm Instructions to Candidates Answer FIVE questions. 11/07/2006 S062 1 1. (a) Explain what is meant by the term ARPANET and how it led to the development of the TCP/IP Reference Model. [6] (b) Describe with the aid of an appropriate diagram the structure of the TCP/IP Reference Model. [10] (c) Compare and contrast the TCP/IP and OSI Reference models. [4] 2. (a) Outline the functions of the Internet Protocol. [4] (b) Explain how the Internet Protocol may be used to transfer messages across an Ethernet local area network. [8] (c) Discuss whether or not it is possible to establish the route taken by a packet travelling through the Internet. [4] (d) Describe the function of the ‘time to live’ field in the IP header and its role in the operation of the Internet Protocol. [4] 3. (a) Describe with the aid of a diagram, the TWO reference configurations for the ISDN user-network interface. [8] (b) Discuss the organisation of transmission and signalling in the ISDN and compare it with the previous network. [6] (c) An ISDN Basic Access Interface sends a physical layer frame every 250μs. Find the overall bit rate which is used by the interface showing clearly how the result is obtained. [3] (d) Calculate the time taken to transmit a 200mm x 300mm facsimile over an ISDN channel. The facsimile digitizes the image into 300 pixels per 25mm and assigns 4 bits per pixel. [3] 11/07/2006 S062 continued