CompTIA Network+ (N10-007) — Question 396

Which of the following protocols operates at the data link layer of the OSI model?

Answer options

• A. IGRP
• B. BGP
• C. PPP
• D. FTP

Correct answer: C

Explanation

PPP, or Point-to-Point Protocol, is designed to operate at the data link layer, facilitating direct connections between two nodes. In contrast, IGRP and BGP are routing protocols that function at the network layer, while FTP operates at the application layer for file transfer.