Huawei Certified Network Professional HCNP H12-721 Updated Exam

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Question 20

An attack source will spoof the server and send a large number of SYN-ACK packets to the attacking target network or server. If the destination port of the packet is the TCP service port of the attacked server, the TCP protocol stack of the server will be abnormal. What is it?

Options:

SYN Flood

SYN-ACK Flood

ACK-Flood

Connection Flood

Question 21

An administrator can view the status of the device components by the following command: The status of the Slot3 board is Abnormal. What are the possible causes of the following faults?

Options:

This slot is not supported in this slot of device A.

interface card is damaged

The pin on the backplane or motherboard is damaged. If the incorrect board is installed, the pin is tilted.

ADSL telephone line failure

Question 22

Which of the following attacks is a SYN Flood attack?

Options:

attacker sends a large number of SYN packets, which causes a large number of incomplete TCP connections to occupy the resources of the attacker.

means that the attacker and the attacked object normally establish a TCP full connection, but there is no subsequent message.

means that the attacker sends a large number of ICMP packets, such as ping, to the attacker.

means that the attacker occupies the link bandwidth of the server by sending a large number of UDP packets to the attacker.

Question 23

The dual-system hot backup load balancing service interface works at Layer 3, and the upstream and downstream routers are connected to each other. The two USG devices are active and standby. Therefore, both the hrp track master and the hrp track slave must be configured on the morning service interface.