基于ip层的高级访问控制列表可以从以下哪个方面进行包过滤？（）

搜题请搜索小程序“爱下问搜题”

问题多项选择题

A.源ip地址及其子网掩码

B.目的ip地址及其子网掩码

C.上层协议信息

D.源/目的的端口号

E.数据包的长度

F.源MAC地址

答案

参考答案：A, B, C, D

选择题

She was often late for school, ___ made her teacher very angry.

A．that

B．it

C．which

D．what

选择题

Could you tell me_________？

A．where is the headmaster

B．whose camera it is

C．what Jack was happened

D．how long does it take you to your school?