What is the highest layer of the protocol stack that the network administrator is using for this operation?

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 network
administrator is using for this operation?

A.
application

B.
presentation

C.
session

D.
transport

E.
internet

F.
data link

Explanation:
FTP belongs to Application layer and it is also the highest layer of the OSI model.