Question

Which of the following protocol is used for transferring files from one machine to another even though both systems have different directory structures?

• A. HTTP
• B. PPP
• C. TCP/IP
• D. FTP

Hint:

Remember:
- To download/upload files $\rightarrow$ use FTP.
- To view web pages $\rightarrow$ use HTTP HTTPS.
- To establish serial dial-up links $\rightarrow$ use PPP.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
The question asks for the standard network protocol used to copy and transfer files between two distinct computers, regardless of potential differences in their operating systems and directory structure formats.

Step 2: Analysing Common Application Protocols:
- HTTP (Hypertext Transfer Protocol): Used primarily for fetching and displaying web pages.
- PPP (Point-to-Point Protocol): A Layer 2 protocol used to establish a direct connection between two network nodes over physical links.
- TCP/IP: The foundational protocol suite of the Internet, used for packet transmission and routing rather than direct file manipulation.
- FTP (File Transfer Protocol): A client-server protocol specifically designed for sending, receiving, and managing files across a network.

Step 3: Detailed Explanation of FTP:
- FTP is designed to handle different directory formats, naming conventions, and file structures across diverse operating systems (such as Windows, UNIX, and macOS).
- It abstracts these system-specific differences by establishing two parallel connections:
- Control Connection (Port 21): Used for sending commands and navigating directories.
- Data Connection (Port 20): Used for the actual file data transfer.
- This abstraction allows a user to download or upload files seamlessly, even if the client computer's directory design is entirely different from the server's directory layout.

Step 4: Final Answer:
The protocol used to transfer files between machines with different directory structures is FTP (File Transfer Protocol).
Hence, option (D) is the correct choice.