A self-built Data Center Interconnect (DCI) provides several advantages:
#High Efficient O&M - With self-built DCI, enterprises have full control over network monitoring, fault management, and performance optimization, reducing dependency on external providers.
#Service Rollout on Time - Unlike leased lines, a self-built DCI network allows rapid service deployment without waiting for telecom operators, improving efficiency.
#Guaranteed Quality - While a self-built network offers more control, it does not always guarantee quality compared to carrier-grade leased lines with SLAs (Service Level Agreements).
Thus, the correct answer is A and C.