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Carrier Sense Multiple Access/Collision Avoidance
a) Necessary since wireless LANs cannot implement CSMA/CD
b) Collision detection requires increased bandwidth requirements
c) Collisions might not be detected due to obstacles
d) Distance between stations may prevent collisions from being heard
e) Collision avoidance is accomplished through network allocation vector (NAV)
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Q. Illustrate Keep alive and Time-Waited Timer? Keep alive timer To prevent a long inactive connection between two TCPs - Either client or server crash
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