Are DevTest Certificates Delivered Self-Signed?

Document ID : KB000106872
Last Modified Date : 17/07/2018
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Are the default certificates provided with DevTest are 'Self-Signed'?

If yes, can we get valid certificates and procedure to use them.

And is my understanding correct? 
Yes, the certificates we deliver with DevTest are self signed.

Yes, you can get your company issued certificates which is up to you.

Yes, your understanding is correct.
Additional Information:
You can refer to the following product documentation: