日韩欧美亚洲 _ 欧美亚洲一区 _ 日本亚洲欧美 _ 亚洲精品欧美国产白袜脚足J棉袜在线观看_亚洲熟妇av一区二区三区_久久天天躁狠狠躁夜_精品众筹模特私拍在线

單項選擇題

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

你可能感興趣的試題

單項選擇題

Refer to the exhibit, Host A pings interface S0/0 on router 3, what is the TTL value for that ping?（）

A. 253
B. 252
C. 255
D. 254

單項選擇題

Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?（）

A.transport
B.network
C.presentation
D.session
E.application