ASPF (Application specific Packet Filter)It is a packet filtering technology based on the application layer, andserver-mapTables implement special security mechanisms. aboutASPFandserver-mapWhich of the following statements is correct? (multiple choice)

IPSec VPN uses an asymmetric algorithm to calculate the ______ key to encrypt data messages.

Security technology has different methods in different technical levels and fields. Which of the following devices can be used for network layer security? (multiple choice)

After an engineer configures the NAT-Server, in order to check the Server-map generated after the configuration, he needs to use the ________ command to query the Server-map.

IPv6 supports configuring the router authorization function on the device, verifying the identity of the peer through digital certificates, and selecting legal devices.