In the active-active disaster recovery solution, which technology can achieve the traffic allocation between the servers of different areas on the WAN (including the Internet), to ensure the best use of server service the nearest customer, thus ensuring access to quality?

In the active-active disaster recovery solution, which technology can achieve the traffic allocation between the servers of different areas on the WAN (including the Internet), to ensure the best use of server service the nearest customer, thus ensuring access to quality?
A . GSLB
B . VIP
C . SLB
D . GLB

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Answer: A