Specifies that the SSL 3.0 protocol is preferred; the SSL 2.0 protocol may be negotiated if the peer cannot use the SSL 3.0 protocol.
- iOS 5.0–13.0Deprecated
- macOS 10.2–10.15Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- tvOS 9.0–13.0Deprecated
- watchOS 2.0–6.0Deprecated
Specifies that no protocol has been or should be negotiated or specified; use default.
Specifies that only the SSL 2.0 protocol may be negotiated. Deprecated in iOS.
Specifies that only the SSL 3.0 protocol may be negotiated; fails if the peer tries to negotiate the SSL 2.0 protocol. Deprecated in iOS.
Specifies all supported versions. Deprecated in iOS.