Question

A slotted ALOHA network transmits 200-bit frames using a shared channel with a 200-kbps bandwidth. Find the throughput if the system (all stations together) produces 500 frames per second.

(a) 92 frames

(b) 368 frames

(c) 276 frames

(d) 151 frames

The question was posed to me in an internship interview.

I need to ask this question from Layers topic in section Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

Answer 1

Right choice is (d) 151 frames

Explanation: G=1/2   S = G × e−G = 0.303 (30.3 percent)

Throughput is 500 × 0.0303 = 151.