フリー問題

問題文

A packet crosses four routers on its way to a destination. Which statement describes how the forwarding decision is made along that path?

選択肢

1. Each router forwards to the neighbor from which the packet did not arrive.
2. The destination host requests the path, and every router reserves an entry for that flow.
3. Each router makes its own independent decision about the next hop, based on its own table and the destination address in the packet.
4. The first router computes the whole path and writes it into the packet.