ASPF (Application Specific Packet Filter) is apacket filtering technology based on the application layer, and implements a special security mechanism through the server-map table. Which of the following statements about the ASPF and server-map tables are correct? (Multiple Choice)

HTTP packets are carried by UDP. and the HTTPS protocol is based on TCP three-way handshake. Therefore.
HTTPS is relatively secure, and HTTPS is recommended.

Which ofjhe following is the encryption technology used in digital envelopes?

In the firewall, detect ftp command to set in which mode? (Choose two.)

In the SSL handshake protocol, which of the following message is optional? (Choose two.)