假定网络中的路由器 B 的路由表有如下的项目(这三列分别表示“目的网络”、“距离” 和“下一跳路由器”) N 1 7 A N 2 2 C N 6 8 F N 8 4 E N 9 4 F 现在 B 收到从 C 发来的路由信息(这两列分别表示“目的网络”和“距离” ): N 2 4 N 3 8 N 6 4 N 8 3 N 9 5 试求出路由器 B 更新后的路由表。
【单选题】听力原文:M: How are you getting to the airport? W: Well, I haven't really got any choice--I have to take the bus. My car is at the garage getting repaired, and a taxi is just too expensive. How is the wom...