Load balancers are not limited to a single rack, subnet, or geographic location. They forward each incoming connection or packet to a healthy backend server anywhere the network can reach-even servers located in different data centers or regions-thereby improving redundancy and performance. They do not alternate traffic between clients, and they do not require all backend servers to share the same subnet or physical hardware.
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How does a network load balancer determine which backend server to route traffic to?
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CompTIA A+ 220-1101 (V14)
Networking
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