Traffic light e router: o que têm em comum

1. Passo 1. Traffic light — tem como parte — Relay. Relay controllers.
2. Passo 2. Relay — faz parte de — Electrical telegraph. Relays boosted the signal on long lines.
3. Passo 3. Electrical telegraph — funciona como — Packet switching. An analogy: telegraph messages were passed from station to station with intermediate storage — a “store and forward” principle similar to packet transmission.
4. Passo 4. Packet switching — é utilizado em — Router. It forwards packets.

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