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- Exam (elaborations) • 2 pages • 2023
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Why Random access method is not superior to Controlled access method 
in Medium access mechanism? Explain CSMA/CD (Carrier sense multiple 
Access/collision detection) protocol and how it improves its performance 
over CSMA. 
(8) 
Que. 2 
C1,2 
BL4 
“Performance would be improved in Selective-Repeat ARQ protocol as 
compare to Go-Back-N ARQ Protocol”. Justify this statement with the 
help of sliding window at sender and receiver side. Give proper scenario 
with diagram to support your ...
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