"The data exchange on the internet is essentially the transmission of individual data packets, with all kinds of information encapsulated within these packets before they are transmitted to various computer terminals for processing."
"Our current attack methods can be understood as sending control-program-containing data packets to the enemy's computer. Once these packets successfully enter the opponent's computer, we can figure out a way to gain control of it."
"Firewalls, on the other hand, are protective measures that separate internal networks from external networks. They can effectively filter out which data packets come from authorized users and which do not, thereby blocking those 'malicious' users' packets from entering the computer."
"Antivirus software functions to identify malicious data and programs that have entered the computer after the fact and to remove them from the computer."
