NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
JANUARY/FEBRUARY 2013 EXAMINATION

COURSE CODE:                                                                              CIT461

COURSE TITLE:                                                                             Internet Architecture and Communications

TIME ALLOWED:                                                                          3 Hours

INSTRUCTIONS:                                                                            Answer any Five (5) Questions

Q1.a     Explain what is meant by Internet Protocol (IP).                                                                  4 marks

      b.   State the two primary responsibilities of IP.                                                                          4 marks

      c.    Outline three main functions of IP.                                                                                         6 marks              

Q2.a     Define packet switching and write short notes on any two packet switching based on Network technologies.                6 marks

     b.    What does circuit switching involve?                                                                                     2 marks

     c.     Discuss three advantages of the circuit switched network over the packed switched network.  6 marks       

Q3.a     List any four requirements for Internet Connectivity.                                                         4 marks

       b.  State the primary function of ISP.                                                                                           2 marks

       c.   Discuss the four different levels of ISPs.                                                                                8 marks 

Q4.       Describe virtual private networks and write short notes on any tunneling protocols.              14 marks

Q5.a     Define web design.                                                                                                                                4 marks

      b.   Outline four basic aspect of web design.                                                                                8 marks

      c.    State the two types of web pages.                                                                                           2 marks

Q6.a     Discuss the principles of operations of the Web search engines.                                       5 marks

      b.   Describe the three different types of web hosting services.                                                9 marks

Q7.a     Propose, the seven points, a general architectural framework for the next generation of the Internet                                   14 marks