The correct statement about application layer attack defense is _____ .

The following information about the AH ( the Authentication Header , Authentication Header ) and the ESP ( Encapsulating Securlt Paload , the Encapsulating Security Payload ) described right there ______ .( Choose one or more )

In the SIP network, which of the following devices belong to UA?

If the user incorrectly configures the packet filtering policy and filters all TCP packets, what happens to the call in the H.323 network ?

In the MSR router configuration command is as follows:
acl number 2001
rule o permit source 19 2.168.2.0 0.0.0.255
acl number 2002
rule o permit source 192.168.3.0 0.0.0.255
acl number 2003
rule o permit source 192.168.0.0 0.0.0.255
#
traffic classifier 2 operator or
if-match acl 2001
if-match classifier 1
traffic classifier 1 operator and
if-match acl 2002
if-match acl 2003
#
traffic behavior 2
filter deny
#
qos polic 2
classifier 2 behavior 2
#
interface GigabitEthernet0/1
port link-mode route
ip address 192.168.1.1 255.255.255.0
qos appl polic 2 0utbound
When the source address are 192.168.2.2.192.168.3.2.192.168.0.2 packets from the port G0 / 1 forwarding outwardly, the following statement is correct ____ .