And amazingly, we're not quite done yet… The OSI model has two more layers, the Presentation Layer and the Application Layer, which include things like web browsers, Skype, HTML decoding, streaming movies and more.

令人惊讶的是，我们还没有完全完成… … OSI 模型还有两层，表示层和应用层，其中包括网络浏览器、Skype、HTML 解码、流媒体电影等。