NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
OCTOBER/NOVEMBER 2014 EXAMINATION

COURSE CODE:                                                                              CIT461

COURSE TITLE:                                                                             Internet Architecture and Communications

TIME ALLOWED:                                                                          3 Hours

INSTRUCTIONS:                                                                            Answer any Five (5) Questions

Q1.a     Define email and list its components parts                                                                            6 marks    

      b.   State four common header fields for email                                                                           8 marks

Q2.a     Enumerate the two types of simple internet connections.                                                   2 marks

      b.   Describe the three main equipment’s required for internet access.                                12 marks       

Q3.a     Explain what is meant by Web Design.                                                                                   4 marks

      b.   List four software packages used for website design.                                                          4 marks

      c.    Outline three basic aspect of design of a typical website                                                     6 marks 

Q4.a     Explain what is meant by a Web Browser                                                                             4 marks

      b.   State five user interface elements common to most web browsers                                 10 marks

Q5.a     Define the term IP and give its two primary responsibilities                                              4 marks

      b.   State three main functions of the IP                                                                                                   6 marks

      c.    List the fields of a typical IP address                                                                                      4 marks

Q6.a     Write short note on HTTP.                                                                                                      6 marks

      b.   Outline four services of the TCP.                                                                                             8 marks

Q7.a     Discuss Packet Switching System with its three popular protocols.                                     8 marks

      b.      Outline three comparisons between Circuit Switching and Packet Switching                    6 marks