フリー問題

問題文

A bridge domain is left at its shipped values and unicast routing is then turned off deliberately. What is the untouched behavior for an unknown multicast destination, and what does switching routing off imply?

選択肢

1. A bridge domain in its default configuration answers an unknown multicast destination by dropping it before it reaches the wire, and turning unicast routing off means the encapsulation must change too
2. A bridge domain in its default configuration answers an unknown multicast destination by flooding it inside the domain, and turning unicast routing off means the encapsulation must change too
3. A bridge domain in its default configuration answers an unknown multicast destination by dropping it before it reaches the wire, and turning unicast routing off means an outside device must route
4. A bridge domain in its default configuration answers an unknown multicast destination by flooding it inside the domain, and turning unicast routing off means an outside device must route