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# NSURLProtectionSpace protocol types

These constants describe the supported protocols for a protection space, as returned by [`protocol`](/documentation/Foundation/URLProtectionSpace/protocol).

## Topics

### Protocol types

[`let NSURLProtectionSpaceHTTP: String`](/documentation/Foundation/NSURLProtectionSpaceHTTP)

The protocol type for HTTP.

[`let NSURLProtectionSpaceHTTPS: String`](/documentation/Foundation/NSURLProtectionSpaceHTTPS)

The protocol type for HTTPS.

[`let NSURLProtectionSpaceFTP: String`](/documentation/Foundation/NSURLProtectionSpaceFTP)

The protocol type for FTP.


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