CompTIA Network+ (N10-008) — Question 77

At which of the following OSI model layers would a technician find an IP header?

Answer options

• A. Layer 1
• B. Layer 2
• C. Layer 3
• D. Layer 4

Correct answer: C

Explanation

The correct answer is Layer 3, as the Internet Protocol (IP) operates at this layer, providing logical addressing and routing. Layer 1 deals with the physical transmission of data, Layer 2 focuses on data link protocols, and Layer 4 is concerned with transport protocols like TCP and UDP, which do not encapsulate IP headers.