In GSLB with ldnsprobeOrder DNS PING TCP, what metric is used to compute dynamic proximity after the probes?

In GSLB with ldnsprobeOrder DNS PING TCP, what metric is used to compute dynamic proximity after the probes?

• A. Time to live (TTL)
• B. Empty Domain Service (EDS)
• C. Multiple IP responses (MIR)
• D. Round-trip time (RTT)

Answer: (D)

Dynamic proximity in GSLB is driven by latency measurements to each potential site, using the time it takes for probes to complete round-trip trips. When ldnsprobeOrder is set to DNS PING TCP, the system runs probes (ICMP ping and TCP connect checks) to each data center and records the round-trip time for each probe. The site with the lowest RTT is considered the closest for clients, so DNS responses are directed to that site accordingly. TTL affects how long DNS results are cached and does not reflect current network latency, while EDS and MIR are not the metrics used for proximity calculations.

Dynamic proximity in GSLB is driven by latency measurements to each potential site, using the time it takes for probes to complete round-trip trips. When ldnsprobeOrder is set to DNS PING TCP, the system runs probes (ICMP ping and TCP connect checks) to each data center and records the round-trip time for each probe. The site with the lowest RTT is considered the closest for clients, so DNS responses are directed to that site accordingly. TTL affects how long DNS results are cached and does not reflect current network latency, while EDS and MIR are not the metrics used for proximity calculations.