GCIA: GIAC Certified Intrusion AnalystDemo

By GIAC · Question Mode

QuestionQ469

IP Headers

Which of the following IP packet elements provides authentication when using IPsec?

  • A Internet Key Exchange (IKE)
  • B Authentication Header (AH)
  • C Layer 2 Tunneling Protocol (L2TP)
  • D Encapsulating Security Payload (ESP)
Explanation

The IPsec Authentication Header (AH) supplies data-origin authentication, integrity protection, and anti-replay protection for the IP packet. IKE performs key exchange and security-association negotiation, whereas L2TP provides tunneling; ESP is principally the payload-security mechanism and may optionally include authentication.

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