Which way can NAC Agent upgrade package be deployed?

For special message attacks, which of the following option descriptions is correct?

UDP is a connectionless protocol. UDP Flood attacks that change sources and ports will cause performance degradation of network devices that rely on session forwarding.
Even the session table is exhausted, causing the network to be paralyzed. Which of the following options is not a preventive measure for UDP Flood attacks?

The following figure shows the configuration of the URL filtering configuration file. Regarding the configuration, which of the following statements is correct?

Fage attack means that the original address and target address of TOP are both set to the IP address of a certain victim. This behavior will cause the victim to report to it.
SYN-ACK message is sent from the address, and this address sends back an ACK message and creates an empty connection, which causes the system resource board to occupy or target The host crashed.