Which of the following attack is SYN Flood attack?

• A.It refers to the attacker and the attacked object the establishment of a normal full TCP connection, but no follow-up messages.
• B.An attacker sends a large number of SYN packets, resulting in a large number of not fully established TCP connections, occupying resources.
• C.It refers to the attacker sending a large number of ICMP packets (such as Ping) consuming link bandwidth.
• D.It refers to the attacker sending a large number of UDP packets to the server consuming link bandwidth.

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After BFD session is established, control packets are sent periodically to each other. If a system does not receive the packet sent by peer within the detection time, it is assumed that the BFD session is down.
Which Mode is this one?

• A.Detection Mode
• B.Synchronous Mode
• C.Asynchronous Mode
• D.Query Mode

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The IP address of the USG firewall GE0/0/0 is 192.168.0.1/24, and the firewall functions as the FTP server.
The IP address of the PC host is 192.168.0.2/24. The GE0/0/0 interface of the firewall and the PC host are connected through the network cable. Connected, as shown below: PC (192.168.0.2/24)--GE0/0/0 USG.
Which of the following commands can be used to complete the backup of the system configuration file vrpcfg.cfg?

• A.Complete the following command on the firewall: <USG>ftp 192.168.0.2 Trying 192.168.0.2 ...Press CTRL+K to abort Connected to 192.168.0.2 220 FTP Server ready User(192.168.0.2):(none) ftpuser 331 Password Required for ftpuser Password: 230 User logged in ftp>get vrpcfg.cfg
• B.Complete the following command on the firewall: [USG] ftp server enable info:Start FTP server
  [USG-aaa] local-user ftpuser password simple Ftppass# [USG-aaa] local-user ftpuser service-type ftp
  [USG-aaa] Local-user ftpuser ftp-directory hda1
• C.Complete the following command on the PC: C:\Documents and Settings\Administrator>ftp 192.168.0.1 Connectd to 192.168.0.1 220 FTP service ready User(192.168.0.1 (none)) ftpuser 331 Password required for ftpuser Password:230 user logged In ftp>put VRPcfg.cfg
• D.Complete the following command on the PC: C:\Documents and Settings\Administrator>ftp 192.168.0.1 Connectd to 192.168.0.1 220 FTP service ready User(192.168.0.1 (none)) ftpuser 331 Password required for ftpuser Password:230 user logged In ftp>get VRPcfg.cfg

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The server health detection mechanism is enabled on the USG firewall of an enterprise to detect the running status of three real servers (Server A, Server B, and Server C) at the back end. When the USG fails to receive any response packet from Server B.
At this point, the use of Server e is forbidden and traffic is distributed to other servers according to the configured policy.

• A.True
• B.False

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In hot standby, what is the number of cycles does not receive the HRP HELLO packet from the peer end, the Slave peer considers the peer end to be faulty?

• A.Five
• B.One
• C.Two
• D.Three

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