In web infrastructure, DNS-based load balancing distributes requests by returning different IP addresses for the same host name, not by routing a single IP address at the TCP/IP level. Based on this, is the statement “A load-balancing approach where requests to one IP address are distributed among multiple servers at the TCP/IP routing level is DNS balancing” accurate?

Introduction / Context:This question checks whether you can distinguish Domain Name System (DNS) load balancing from lower-layer load-distribution techniques. DNS round-robin balances by handing out different IP addresses at name-resolution time, while layer-4 or layer-7 load balancers route traffic for a single virtual IP to multiple back-end servers.

Given Data / Assumptions:

• The statement describes a single IP address with distribution occurring “at the TCP/IP routing level.”
• DNS balancing typically involves multiple A/AAAA records for one host name.
• Layer-4/7 load balancers and reverse proxies can front a single virtual IP and fan out requests.

Concept / Approach:DNS balancing operates at name resolution: clients receive one of several IPs. Routing or proxy-based load balancing operates after resolution, often using a single virtual IP that distributes traffic internally. The prompt conflates these approaches, attributing TCP/IP–level single-IP routing to DNS, which is inaccurate.

Step-by-Step Solution:

Verification / Alternative check:Check common architectures: “DNS round robin” vs “reverse proxy/ADC.” Only the latter uses one VIP to split traffic post-resolution.

Why Other Options Are Wrong:

• Correct: would wrongly accept the conflation.
• Only accurate when anycast is used: anycast still uses DNS to a single IP advertised from many locations; it is not DNS round robin at the TCP routing level as stated.
• Accurate for reverse proxies but not DNS: reinforces that the statement is not describing DNS balancing.

Common Pitfalls:Confusing DNS round robin with VIP-based load balancers; assuming DNS is session-aware (it is not).

Final Answer:Incorrect