Question 8207 – Computer-Networks

Consider  a LAN with four nodes S₁, S₂, S₃ and S₄. Time is divided into fixed-size slots, and a node can begin its transmission only at the beginning of a slot. A collision is said to have occurred if more than one node transmit in the same slot. The probabilities of generation of a frame in a time slot by S₁, S₂, S₃ and S₄ are 0.1, 0.2, 0.3 and 0.4, respectively. The probability of sending a frame in the first slot without any collision by any of these four stations is _________.

Correct Answer: A

S₁→0.1
S₂→0.2
S₃→0.3
S₄→0.4
The probability of sending a frame without any collision by any of these stations is