In IPsec, ESP is an encapsulating security payload protocol and only provides data encryption functions.

In a PKI system, the CA certificate cannot be a self-signed certificate.

In an actual network environment, the session information of some special service data flows needs to not be aged for a long time. By configuring the long connection function, you can ensure the normal operation of this type of business. You can enable the long connection function by executing the command () enable.

In the process of using digital envelopes, which of the following information will be encrypted?
(Multiple Choice)

Which of the following operations cannot improve the anti-virus capability of the system?