CAS-003 Question #861: Real Exam Question with Answer & Explanation

The correct answer is B: load balancer algorithm. When a web server farm experiences availability issues, the likely culprit is uneven or inefficient traffic distribution across the servers. The load balancer algorithm determines how requests are distributed - for example, round-robin distributes evenly by count but ignores serv

Question

After multiple availability issues, a systems administrator is reviewing the following metrics from the web server farm, which is configured to serve the company's e-commerce site: To reduce the availability risk, the company should implement a new:

Exhibit

Options

Alog correlation and aggregation system
Bload balancer algorithm
Cweb application firewall
Dweb server to the farm

Explanation

When a web server farm experiences availability issues, the likely culprit is uneven or inefficient traffic distribution across the servers. The load balancer algorithm determines how requests are distributed - for example, round-robin distributes evenly by count but ignores server load, while 'least connections' or 'weighted' algorithms route traffic based on current capacity. Changing to a more appropriate algorithm ensures no single server is overwhelmed while others sit idle, directly addressing availability risk. Adding a log aggregator (A) aids visibility but doesn't fix distribution; a WAF (C) is a security control, not a capacity control; and adding a server (D) may help scale but doesn't fix a poor distribution algorithm.

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