Transfer protocol of test result.
Options:
1.ftp(1) - Indicates that the test result file transfer mode is ftp.
2.tftp(2) - Indicates that the test result file transfer mode is tftp.
3.sftp(3) - Indicates that the test result file transfer mode is sftp.
4.invalid(-1) - Indicates that the query fails or no information is detected.
Default:ftp(1).