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?
Click on the arrows to vote for the correct answerA. B. C. D. E. F.
The highest layer of the protocol stack that the network administrator is using for establishing an FTP connection to a remote server is the application layer.
FTP (File Transfer Protocol) is an application-layer protocol that enables file transfer between hosts. The application layer is the topmost layer of the OSI (Open Systems Interconnection) model, and it is responsible for providing network services and application support to end-users.
The application layer interacts with the software application that requires network services and provides an interface to the network protocols and services. In this case, the FTP client software running on the host communicates with the FTP server software running on the remote server using the FTP protocol.
The other options listed in the question are layers below the application layer in the OSI model, and they provide services to the application layer.
The presentation layer (option B) is responsible for data representation and encryption/decryption of data for secure transmission. It prepares the data in a format that is understood by the application layer.
The session layer (option C) establishes, manages, and terminates sessions between applications. It ensures that data exchanges are synchronized and orderly.
The transport layer (option D) is responsible for end-to-end delivery of data between hosts. It provides reliable, connection-oriented data transmission using TCP (Transmission Control Protocol) or unreliable, connectionless data transmission using UDP (User Datagram Protocol).
The internet layer (option E) is responsible for addressing and routing data packets between hosts on different networks. It uses IP (Internet Protocol) to encapsulate data into packets and forward them to their destinations.
The data link layer (option F) is responsible for the physical transmission of data over a network segment. It defines the format of data on the network and handles error detection and correction.
In summary, the highest layer of the protocol stack that the network administrator is using for establishing an FTP connection to a remote server is the application layer.