what' s the sentence mean?

hi. i am not familiar with English,so i can not understand the sentence:You can delegate authority of a subdomain to a DNS server that you want to manage that portion of your DNS namespace. The sentence describes the Mircrosoft Dns. Of course,it is have nothing to do with opengl . but , it’s important for me to understand the sentence. thank you!
Only if you split the sentence into several short sentence , i can understand it . thank you again.