jcifs login order

I am using Samba jcifs API to access Windows shares from a Java program, I successfully log in with the string "smb://a.com;administrator:password@10.0.0.89/shared/".

After I change to a non-existent domain I can still log in successfully, this is also the same for开发者_Go百科 workgroup.

I want to know how jcifs processes authentication.

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I think it depend on samba server configuration.