Multiple choice

Which of the following protocols operates at the lowest levels of the OSI model?

  1. ARP

  2. FTP

  3. SSL

  4. NFS

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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. FTP, SSL, and NFS operate at higher layers (Application or Presentation).