When connecting in a public placeWi-FiWhich of the following actions is relatively safer?

Clients in the Trust zone of the firewall can log in to the FTP server in the Untrust zone, but cannot download files. Which of the following methods can solve the problem? (Multiple Choice)

Please correspond to the following protocols and their TCP/IP protocol stack level

Please order the following digital envelope encryption and decryption processes correctly.

The account authority of an employee of a company has expired, but the account can still be used to access the company's server. Which security risks are the above scenarios? (Multiple choice)