2. 计算机
  3. You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operation? A.

You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operation? A.

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问题 You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operation?
A. Application
B. Presentation
C. Session
D. Transport
E. Internet
F. Data Link
G. Physical
选项
答案A
解析 Explanation:
Layer 7 is the application layer, which is the highest layer in the OSI model. This layer describes the use of end user applications, such as opening movie files (avi, mpeg, etc) used Microsoft Office applications, using WWW browsers, using Telnet, and using FTP.
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