The security issues are integrated into DToC, rather than travelling through other layers and translations that you need to configure separately.
安全性问题被集成到DToC中，而不是通过需要分别配置的其它层和转换。
2
The DToC server piggybacks on the HTTP protocol (and by default uses port 80) to serve a "remote desktop" across a network -- either a LAN or the Internet.