下列哪个子句实现对一个结果集进行分组和汇总？（）
A、HAVING
B、ORDERBY
C、WHERE
D、GROUPBY
Which type of traffic will cause Policed Discards errors on an interface on a JUNOS device?（）
A、Traffic that does not match any route in the forwarding table.
B、Traffic that exceeds the bandwidth of the interface.
C、Traffic of unsupported protocols on that interface.
D、Traffic arriving on unknown virtual-circuits on that interface.
支路单元组
患者25岁，子痫，G1P1，产后2天，外阴水肿仍未消退。治疗时使用的溶液是（）
A、50%硫酸镁
B、75%乙醇
C、1%乳酸液
D、1：5000高锰酸钾
E、4%碳酸氢钠
Which two design goals describe the Junos OS design?（）
Aclean separation of security and routing policies
Bclean separation of control and forwarding planes
Cmodularization of multiple software processes
Da single hardware platform for all software applications
How may L2TP tunnel destinations are allowed per domain?（）
A、1
B、11
C、21
D、31