SMTP e tunnelling shield: o que têm em comum

1. Passo 1. SMTP — é utilizado em — E-mail. Sending mail.
2. Passo 2. E-mail — evoluiu de — Postal service. Electronic mail.
3. Passo 3. Postal service — utiliza — Steam locomotive. Mail trains.
4. Passo 4. Steam locomotive — utiliza — Railway track. It runs on rails.
5. Passo 5. Railway track — é utilizado em — Metro. It runs on rails.
6. Passo 6. Metro — utiliza — Tunnelling shield. Metro tunnels were built with shields.

Abrir Evothings