WAN ni protokol!
A wide area network (WAN) is a telecommunications network, usually used for connecting computers, that spans a wide geographical area. WANs can by used to connect cities, states, or even countries. WANs are often used by larger corporations or organizations to facilitate the exchange of data, and in a wide variety of industries, corporations with facilities at multiple locations have embraced WANs. Increasingly, however, even small businesses are utilizing WANs as a way of increasing their communications capabilities.
In port tudi ni Input ampak je samo "port" ali "vrata", ker podatki tečejo ven in notri, povezati pa mora katerikoli port prvega stikala s katerimkoli portom drugega stikala, (seveda če to NISTA "management switcha") in tudi porta 0 ni ker je lepo omenil 1 in 8.
Tako da je pravilen odgovor št. 2 od Trigga!