1. IPsec offers the following protections for VPN Traffic
    1. Confidentiality
    2. Integrity
    3. Authentication
  2. IPsec use a collection of protocols to provide its features. One of the primary protocol it use is Internet Key Exchange(IKE).
    1. Main Mode
    2. Aggressive Mode
    3. Quick Mode
  3. IPsec relies on
    1. Authentication Header (AH), Protocol 51
    2. Encapsulating Securit Payload (ESP), Protocol 50

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