protocol SSL
  description   SSL- Protocol description.
  abbreviation SSL Secure Socket Layer
  version 3.0 Succesor of 2.0 introduced in 1996 and described by IETF in 2011
  version 2.0 Release in 1995 but quicly superseeded by 3.0
  version 1.0 Never releeased
  document Wiki-TLS More on SSL and TLS on Wikipedia.
  protocol SFTP SFTP - Protocol description.