A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the nework administrator is using for this operation?（）
- A、application
- B、presentation
- C、session
- D、transport
- E、internet
- F、data link
正确答案:A
答案解析:有
微信扫一扫手机做题