Which two policy actions are considered flow control actions?（）

单项选择题What is a vaild match criteria for a firewall filter?（）

A.from protocol tcp
B.from url
C.from community
D.from acl

多项选择题Which three are considered match criteria in a policy?（）

A.prefix-list
B.protocol ospf
C.next-term
D.AS path
E.prefix-term