A network administrator needs to devise a strategy to optimize resource utilization when web-traffic spikes unpredictably, while also avoiding a single point of failure in the web-service infrastructure. Which configuration best meets these business requirements?
Deploy a reverse proxy to manage web requests
Implement RAID configurations for all web servers
Create a server cluster for redundancy
Introduce a load balancer to distribute the traffic
Placing a load balancer in front of a pool of identical web servers distributes each client request according to algorithms such as round-robin or least-connections. This evens out utilization, prevents any one server from being overwhelmed during traffic spikes, and automatically stops sending traffic to a failed node, eliminating that node as a single point of failure.
Clustering technologies focus on node redundancy and failover; in common active-passive clusters only one node actively serves traffic at a time, so they do not automatically spread day-to-day load. A reverse proxy can perform security, caching, and-depending on the product-may include load-balancing features, but the term alone does not guarantee request distribution. RAID protects disk storage and has no effect on HTTP traffic flow.
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