NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
SEPTEMBER 2020 EXAMINATION

COURSE CODE: CIT 832

COURSE TITLE: OPERATING SYSTEM CONCEPTS AND NETWORKING MANAGEMENT

COURSE UNIT: 2 UNITS

TIME ALLOWED: 2 HRS

INSTRUCTION: ANSWER QUESTION 1 AND ANY OTHER 3 (3) QUESTIONS

QUESTION ONE

1ai) Categorize the features of Graphical User Interface? (3 marks)

1aii) Appraise the evolution of Human and Machine Interaction (3 marks)

1aiii) What are GUIs? Analyse the Common Graphical User Interfaces (4 marks)

1b). Extensively discuss the following operating systems Architecture:

i. Network Operating System (3 marks)

ii. Distributed Operating System (3 marks)

iii.Multiprocessor Operating Systems (3 marks)

1c). In a tabular form distinguish four configuration procedure by method and operating system (protocols). (6 marks)

QUESTION TWO

2a). Briefly analyse the following Network security issues:

i. Integrity (3 marks)

ii. Confidentiality (3 marks)

iii.Availability (3 marks)

2bi). Justify why we study OS (3 marks)

2bii). Appraise the functions of Operating system (3 marks)

QUESTION THREE

3a) Differentiate Router from Hub (6 marks)

3b) Compare the features of repeater and bridge (6 marks)

3c). With the aid of diagram, illustrate the positioning of an operating system in the overall computer system. (3 marks)

QUESTION FOUR

4a) Discuss in detail the advantages that network offer to individuals and organization. (3 marks)

4b) Explicate the features of each of the following:

i. Local Area Network (LAN) (4 marks)

ii. Metropolitan Networks (MANs) (4 marks)

iii. Wide Area Network (4 marks)

QUESTION FIVE

a) Examine the five (5) components of data communication model (7 ½ marks)

5b) Differentiate between the following:

(i) Guided transmission media and

(ii) Unguided transmission media (6 marks)

5c) Clarify the use of Multiprogramming Approach? (1½ marks)