Question

Explain the functions of common network protocols: HTTP, FTP, SMTP, and TCP/IP.

Hint:

• {HTTP} – Transfers web pages.
• {FTP} – Transfers files.
• {SMTP} – Sends emails.
• {TCP/IP} – Manages reliable communication and routing on the internet.

Answer 1

Concept: A network protocol is a set of rules that governs how data is transmitted and received over a computer network. Protocols define the format, timing, sequencing, and error control of data communication between devices. 1. HTTP (Hypertext Transfer Protocol): HTTP is a protocol used for transferring web pages and other resources on the World Wide Web between a client (web browser) and a web server. Functions of HTTP:

• Allows web browsers to request web pages from servers.
• Transfers hypertext documents such as HTML files.
• Supports communication between clients and web servers.

2. FTP (File Transfer Protocol): FTP is a protocol used for transferring files between computers over a network, especially between a client and a server. Functions of FTP:

• Enables uploading and downloading of files between systems.
• Provides file management operations such as rename, delete, and move.
• Commonly used for transferring large files over the internet.

3. SMTP (Simple Mail Transfer Protocol): SMTP is a protocol used for sending emails from one server to another over the internet. Functions of SMTP:

• Transfers outgoing emails from the sender to the mail server.
• Routes emails between different mail servers.
• Works with other protocols like POP3 or IMAP for receiving emails.

4. TCP/IP (Transmission Control Protocol / Internet Protocol): TCP/IP is a suite of communication protocols used for connecting devices on the internet and ensuring reliable data transmission. Functions of TCP/IP:

• TCP ensures reliable and error-free delivery of data.
• IP handles addressing and routing of data packets.
• Enables communication between different networks across the internet.