QUESTION: 49

When there is a lot BFD sessions in a system, in order to prevent periodic OFD control packets from affecting the normal operation of the system, you can use what mode of BFD?

Synchronous Mode
Detection Mode
Asynchronous Mode
Query Mode

Answer(s): D

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Three FTP servers are configured with load balancing on a USG firewall. The address and weights of the three real servers are 10.1.1.3/24 (weight 16), 10.1.1.4/24 (weight 32), 10.1.1.5 / 24 (weight 16), while the virtual server address is 202.152.26.123/24. A host address with the IP address 202.152.26.3/24 initiates access to the FTP server.
On the firewall running the display firewall session table command detection configuration, which of the following situations illustrate the successful implementation of load balancing?

<USG> display firewall session table
Current total sessions: 1
ftp VPN: public -> public 202.152.26.3:3327 -> 10.1.1.4:21
<USG> display firewall session table
Current total sessions: 3
ftp VPN: public -> public 202.152.26.3:3327 -> 202.152.26.123:21 [10.1.1.3:21]
ftp VPN: public -> public 202.152.26.3:3327 -> 202.152.26.123:21 [10.1.1.4:21]
ftp VPN: public -> public 202.152.26.3:3327 -> 202.152.26.123:21 [10.1.1.5:21]
<USG> display firewall session table
Current total sessions: 1
ftp VPN: public -> public 202.152.26.3:3327 -> 202.152.26.123:21
<USG> display firewall session table
Current total sessions: 3
ftp VPN: public -> public 202.152.26.3:3327 -> 10.1.1.3:21
ftp VPN: public -> public 202.152.26.3:3327 -> 10.1.1.4:21
ftp VPN: public -> public 202.152.26.3:3327 -> 10.1.1.5:21

Answer(s): B

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QUESTION: 51

Which of the following attack is SYN Flood attack?

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

Answer(s): A

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QUESTION: 52

In a Link-group with three physical interfaces, when either one of the interfaces fail, which of the following descriptions of what happens is correct? (Choose two answers)

With any interface failure within the group, the system will set the other interface state to Down.
When any interface group fails, the other interface status within the group does not change.
When the group returned to normal with one of the interfaces up, the interface status within the entire group will be re-set to Up.
When the group returns to normal after all the interfaces are up, the interface status within the entire group was re-set to Up.

Answer(s): A,D

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QUESTION: 52