默认情况下，7750SR的POS端口及以太网端口OSPF的网络类型是（）A、point-to-point，point-to-multipointB、broadcast，point-to-multipointC、point-to-multipoint，broadcastD、point-to-point，broadcast
题目
默认情况下，7750SR的POS端口及以太网端口OSPF的网络类型是（）
- A、point-to-point，point-to-multipoint
- B、broadcast，point-to-multipoint
- C、point-to-multipoint，broadcast
- D、point-to-point，broadcast