A machine that links two networks using two different protocols is known as a

A gateway is a machine that joins two networks and translates between their two different protocols.

Protocol way is not a real networking device or term.

E-way is not a term for a protocol-translating connector.

A plain gate is not a networking device; the full term is gateway.

Because it converts between protocol families, a gateway works across differing network architectures.

A router, by contrast, forwards packets between networks that already share a protocol.