What metric does Global Server Load Balancing monitor to route clients to the best performing site?

What metric does Global Server Load Balancing monitor to route clients to the best performing site?

• A. RTT value
• B. Bandwidth
• C. Jitter
• D. Hop count

Answer: (A)

Global Server Load Balancing bases its routing on latency, directing clients to the site that will respond fastest. It does this by measuring the round-trip time (RTT) from the client to each site—the total time for a packet to travel to the site and back. The site with the lowest RTT indicates the quickest path with the least delay, so traffic is steered there to minimize user-perceived latency. This RTT metric is dynamic, adapting to current network conditions like congestion or link failures, which is why it’s the most reliable indicator for choosing the best performing site. Bandwidth, by contrast, shows capacity rather than actual response speed; jitter is important for fluctuating delay but doesn’t alone identify the fastest path; hop count simply counts routers and doesn’t reflect real-time performance. RTT directly measures the user experience of responsiveness, making it the best metric for GSLB routing decisions.

Global Server Load Balancing bases its routing on latency, directing clients to the site that will respond fastest. It does this by measuring the round-trip time (RTT) from the client to each site—the total time for a packet to travel to the site and back. The site with the lowest RTT indicates the quickest path with the least delay, so traffic is steered there to minimize user-perceived latency. This RTT metric is dynamic, adapting to current network conditions like congestion or link failures, which is why it’s the most reliable indicator for choosing the best performing site.

Bandwidth, by contrast, shows capacity rather than actual response speed; jitter is important for fluctuating delay but doesn’t alone identify the fastest path; hop count simply counts routers and doesn’t reflect real-time performance. RTT directly measures the user experience of responsiveness, making it the best metric for GSLB routing decisions.