BAC5107  MOBILE COMPUTING.

UNIVERSITY EXAMINATIONS: 2018/2019
EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN APPLIED
COMPUTING
BAC5107 MOBILE COMPUTING
FULL TIME/PARTTIME
DATE: AUGUST 2019 TIME: 2 HOURS
INSTRUCTIONS: Answer Question One & ANY OTHER TWO questions.

QUESTION ONE
a) Briefly discuss the numbers that are needed to locate an MS and to address the MS
[8 Marks]
b) Describe the following as used in Mobile Computing:
i. GPRS [1 Mark]
ii. GGSN [1 Mark]
iii. SGSN [1 Mark]
iv. BSSGP [1 Mark]
v. UMTS [1 Mark]
c) What is RSS? [1 Mark]
d) List and explain the FOUR entities of RSS [8 Marks]
e) Briefly describe the components of a SIM card and their functions. [8 Marks]
QUESTION TWO
a) Define MANET [1 Mark]
b) Differentiate between a cellular and an Ad-Hoc Networks [10 Marks]
c) Explain the THREE types of communication with regards to Mobile Computing
[9 Marks]
QUESTION THREE
a) Give FOUR examples of mobile operating systems [4 Marks]
b) Describe FIVE parts in Android architecture [5 Marks]
c) List and FOUR responsibilities of Linux Kernel [4 Marks]
d) What is the use of WCMP? [2 Marks]
e) What are the two functions of transport layer in the internet? [2 Marks]
f) Explain the mechanisms of TCP that influence the efficiency in mobile environment [3 Marks]
QUESTION FOUR
a) Explain the concept of modulation in detail [7 Marks]
b) Explain in detail about Signal Propagation [5 Marks]
c) Briefly discuss FOUR multiplexing techniques and their applications [8 Marks]
QUESTION FIVE
a) Study the diagram below and answer questions that follow:
i. Identify the hidden terminal and give reasons why it is considered hidden [2 Marks]
ii. Identify the exposed terminal and give reasons why it is considered exposed [2 Marks]
iii. Identify the near and far terminals [2 Marks]
b) Describe the following as used in satellite technology
i. GEO [1 Mark]
ii. LEO [1 Mark]
iii. MEO [1 Mark]
iv. HEO [1 Mark]
c) Give a short description of the Bluetooth architecture [5 Marks]
d) What are the requirements of mobile IP? [5 Marks]

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