虚拟专用网络 (xūnǐ zhuānyòng wǎngluò): A virtual private network (VPN) is a secure connection that allows users to access the internet privately and securely.
在线平台 (zàixiàn píngtái): An online platform refers to a website or application that provides services or resources over the internet.
网络安全 (wǎngluò ānquán): Network security involves protecting computer networks from unauthorized access, use, disclosure, disruption, modification, or destruction.