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Which of the following is the correct description of the SMURF attack?
Note: B-Land attack; C-Faggle attack: use UDP port 7 (ECHO) - respond to received content and port 19 (Chargen) will generate a character stream after receiving UDP message; D- special ICMP unreachable packet attack in packet attack
As shown below, the domain abc address pool is the address pool where the L2TP VPN user is located. What is wrong with the following statement?

Two USG firewalls establish an IPSec VPN through the Site to Site mode. When viewing the status of a USG A, the following is displayed: display ipsec statistics the security packet statistics: input/output security paskets: 40 input/output security bytes: 400/0 input /output dropped security packets: 0/0 By status information, what information can be obtained correctly?
Which of the following protocol messages cannot be propagated in an IPSec tunnel by default?
Note: By default, IGMP messages do not support fragmentation.
In Huawei's abnormal traffic cleaning solution, the characteristics of the straight-line deployment mode and the bypass deployment mode are correct.