Which protocol uses X.509 certificates to support mail protection performed by mail agents?

Last Updated: May 28, 2021
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Which protocol uses X.509 certificates to support mail protection performed by mail agents?

  • IPsec
  • SSL
  • S/MIME
  • EAP-TLS

Explanation: Many applications use the X.509 standard format of digital certificates to authenticate websites, public key distribution, and end devices connected to switch ports. User email agents use the S/MIME protocol to support email protection. S/MIME uses X.509 certificates.

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