CompTIA Network+ (N10-007) — Question 286

A network technician is configuring network addresses and port numbers for a router ACL to block a peer-to-peer application. Which of the following is the
HIGHEST layer of the OSI model at which this router ACL operates?

Answer options

• A. Transport
• B. Network
• C. Session
• D. Application

Correct answer: A

Explanation

The correct answer is A, Transport, because ACLs operate at this layer to filter traffic based on port numbers, which are relevant for transport protocols. Options B (Network), C (Session), and D (Application) do not directly manage port numbers, making them less relevant for this specific configuration task.