Each protocol in networking serves a specific function: HTTP is for web pages, FTP for file transfers, SMTP for email, and TCP for reliable data transmission.
- HTTP (Hyper Text Transfer Protocol) corresponds to IV.
- FTP (File Transfer Protocol) corresponds to I.
- SMTP (Simple Mail Transfer Protocol) corresponds to II.
- TCP (Transmission Control Protocol) corresponds to III.
Thus, the correct matching is A-IV, B-I, C-III, D-II.