Question

Which application allows a user to access and change remote files without actual transfer over a complete network?

• A. TELNET
• B. NFS
• C. FTP
• D. DNS

Hint:

Think of the difference between "file transfer" and "file system". FTP is for transfer. NFS makes a remote system's files appear as if they are part of the local file system.

Answer 1

The Correct Option is B

Step 1: Analyze the function of each protocol/application.

TELNET: Provides a remote command-line interface to a machine. It does not directly manage files in the way described. You could use it to run commands that change files, but the file system itself is not presented to the user's local machine.
NFS (Network File System): This is a distributed file system protocol that allows a user on a client computer to access files over a computer network much like local storage is accessed. The remote file system is "mounted" on the client, and the operating system handles the reading and writing of portions of files, not the complete transfer of the file for every access. This matches the description perfectly.
FTP (File Transfer Protocol): As the name implies, its purpose is to transfer entire files from one host to another.
DNS (Domain Name System): This is a system for mapping human-readable domain names to numerical IP addresses. It has no role in file access.

Step 2: Identify the correct application. NFS is the application that allows transparent remote file access and modification without requiring the user to manually transfer the complete file first.