单选题What is true regarding Autonomous Systems （AS ）？（）AAS numbers are assigned by the IANABAS numbers are used by BGP （Border Gateway protocol ） to exchange IP routing information with neighboring ASCIn the internet， an Autonomous System （AS） is a collection of IP networks and routers under the controlDAll of the Above
单选题
What is true regarding Autonomous Systems （AS ）？（）
A
AS numbers are assigned by the IANA
B
AS numbers are used by BGP （Border Gateway protocol ） to exchange IP routing information with neighboring AS
C
In the internet， an Autonomous System （AS） is a collection of IP networks and routers under the control
D
All of the Above
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