問題文
A technician reads the procedure by which a host learns how much of its address names the local network, and looks at the two message types that the standard adds for that purpose. Which statement is correct?
選択肢
- The type written AM1 carries the question about the mask and the type written AM2 carries the answer, and the standard lets a plain host be the sender of either of them.
- The type written AM1 carries the question about the mask and the type written AM2 carries the answer, and a gateway is the sender that the standard allows for either.
- The type written AM2 carries the question about the mask and may reach a machine from a gateway or from a plain host, while the type written AM1 carries the answer and may reach a machine from a gateway alone.
- The type written AM1 carries the question about the mask and may reach a machine from a gateway or from a plain host, while the type written AM2 carries the answer and may reach a machine from a gateway or from a host that is standing in for a gateway.