フリー問題

問題文

Two routers run the liveness protocol in asynchronous mode. Each end sends control packets at a fixed interval, and each end also carries a small integer alongside that interval. How is the time to declare the path down derived?

選択肢

1. The detection time follows physical carrier signal loss under asynchronous operation.
2. The detection time follows negotiated keepalive frequency under asynchronous operation.
3. The detection time follows routing protocol timer defaults under asynchronous operation.
4. The detection time follows configured interval times multiplier under asynchronous operation.