Multiple choice In the OSI Model, which of the following protocols reside at the Data Link Layer? ARP Netbios SMTP, FTP IP, AppleTalk Reveal answer Fill a bubble to check yourself A Correct answer Explanation ARP (Address Resolution Protocol) operates at the Data Link layer (or between Layer 2 and 3) to map IP addresses to MAC addresses. SMTP and FTP are Application layer protocols, while IP is a Network layer protocol.