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  • CompTIA Security+ Certification Exam - OSI Model Online Quiz
  • Which of the following protocols operates at the highest ...
Multiple choice

Which of the following protocols operates at the highest layer of the OSI model?

  1. IPsec

  2. TCP

  3. SMTP

  4. WAN

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SMTP (Simple Mail Transfer Protocol) is an Application layer (Layer 7) protocol. TCP is Layer 4, and IPsec is typically Layer 3.

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