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?
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FTP belongs to Application layer and it is also the highest layer of the OSI model.
The highest layer of the protocol stack that the network administrator is using for this operation is the application layer.
The application layer is the highest layer of the OSI (Open Systems Interconnection) model, and it provides services that directly support user applications. It is responsible for identifying and establishing the availability of communication partners, synchronizing communication, and establishing privacy and integrity of data exchanged between the applications.
FTP (File Transfer Protocol) is an application layer protocol used for transferring files between hosts over a TCP/IP network. Therefore, when the network administrator establishes an FTP connection to a remote server, they are using the application layer protocol to initiate and control the transfer of files.
The other layers of the OSI model are:
In summary, the network administrator is using the application layer protocol, FTP, to establish a connection to a remote server and transfer files.