The IPsecVPN tunnel is successfully established, but the speed of accessing the peer’s private network web page is slow or the access is intermittent. The influence of the Internet network quality has been eliminated. The following possible faults are: (Multiple Choice)

The IPsecVPN tunnel is successfully established, but the speed of accessing the peer’s private network web page is slow or the access is intermittent. The influence of the Internet network quality has been eliminated. The following possible faults are: (Multiple Choice)
A . The problem of packet fragmentation
B. The CPU usage of the egress gateway is too high
C. There is a NAT device in the middle of the network
D. The packet filtering policy is not enabled

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Answer: AB