CCNA Routing and Switching (legacy) — Question 94

What is the authoritative source for an address lookup?

Answer options

• A. a recursive DNS search
• B. the operating system cache
• C. the ISP local cache
• D. the browser cache

Correct answer: A

Explanation

The correct answer, A, refers to a recursive DNS search, which queries multiple DNS servers to resolve a domain name to an IP address. The other options, such as the operating system cache, ISP local cache, and browser cache, serve as temporary storage and may not provide the most current or authoritative address information.