Computer Communication and Network BS 3 Semester/Term UOS — University of Sargodha 2020
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BS ZOOLOGY first semester Animal diversity ZOOL 101 - university of Punjab 2025
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Literary criticism
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this paper consists of 60 marks but now we have 35 marks paper.
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Can you please tell me more past papers please because my exams are starting from next week
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Did you provide the past papers of the science of society uos?
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Paper text
University of Sargodha
BS 3rd Term Examination 2020
Subiect: Computer Sclence Paper: Computer Communication & Network (CMP-2540)
Time Allowed: 2:30 Hours
Maximum Marks: 80
Note:
Objective part is compulsory. Attempt any three questions from subjective part.
Objective Part
(Compulsory)
Q.1
Write short answers of the following in 2-3 lines each on your answer sheet.
i. What is encryption? Which layer is responsible for encryption?
ii. How does attenuation differ from distortion?
ili. Difference between packet switching and circuit switching.
iv. Why twisted pair cable is twisted?
v Which two layers offer reliability?
vi. What is the goal of multiplexing?
viir Define Infrared signals? Give an examplé.
viii. Difference between layer 2 switch and bridge?
ix& Define ALOHA and Slotted ALOHA techniques.
x.- What is cell sectoring?
xi. Define IEEE 802.11 standard?
xii Difference between block coding and scrambling?
xiii.
What is the goal of physical addressing?
xiv. Difference between multimode step index and graded index?
xV.
Why are protocols needed?
xvi. Define Ethernet?
(16*2)
Q.2.
Q.3.
Q.4.
Q.5.
Q.6.
Subjective Part
(3*10)
Explain OSI model with functionality of each layer.
Define VLAN. How VLAN group members can be identified? What are the advantages of
VLAN?
Discuss the generations of cellular wireless networks?
What is multiplexing? Explain the categories of multiplexing.
Explain the technologies of DSL.
