多选题Which two statements about the use of SCREEN options are correct? （）(Choose two.)ASCREEN options offer protection against various attacksBSCREEN options are deployed prior to route and policy processing in first path packet processingCSCREEN options are deployed at the ingress and egress sides of a packet flowDSCREEN options, you must take special care to protect OSPF
多选题
Which two statements about the use of SCREEN options are correct? （）(Choose two.)
A
SCREEN options offer protection against various attacks
B
SCREEN options are deployed prior to route and policy processing in first path packet processing
C
SCREEN options are deployed at the ingress and egress sides of a packet flow
D
SCREEN options, you must take special care to protect OSPF
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