In dynamic proximity calculations, which metric is computed from the sequence of DNS UDP probe, Ping, then TCP?

In dynamic proximity calculations, which metric is computed from the sequence of DNS UDP probe, Ping, then TCP?

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

Answer: (C)

The concept being tested is end-to-end latency captured by a complete request–response cycle. When you perform a DNS UDP query, then a Ping, and finally establish a TCP connection, you’re measuring the total time from the start of the first probe to the end of the last step. The metric that represents this overall round-trip latency is round-trip time. It reflects the full delay experienced along that path, including DNS resolution, ICMP echo timing, and the TCP handshake. Other terms don’t fit this context: TTL relates to the maximum hops an IP packet can take, and the other two options aren’t standard metrics derived from this multi-step probe sequence.

The concept being tested is end-to-end latency captured by a complete request–response cycle. When you perform a DNS UDP query, then a Ping, and finally establish a TCP connection, you’re measuring the total time from the start of the first probe to the end of the last step. The metric that represents this overall round-trip latency is round-trip time. It reflects the full delay experienced along that path, including DNS resolution, ICMP echo timing, and the TCP handshake. Other terms don’t fit this context: TTL relates to the maximum hops an IP packet can take, and the other two options aren’t standard metrics derived from this multi-step probe sequence.