200-901 · Question #512
An existing application is accessible from an external IP address. Which device or service must be configured to make the application accessible through a URL by using a domain name?
The correct answer is B. DNS. DNS (Domain Name System) is the service responsible for resolving human-readable domain names (e.g., www.example.com) to IP addresses. Without a DNS record mapping the domain name to the application's external IP address, browsers cannot locate the server. A reverse proxy (A)…
Question
An existing application is accessible from an external IP address. Which device or service must be configured to make the application accessible through a URL by using a domain name?
Options
- Areverse proxy
- BDNS
- Cfirewall
- Dload balancer
How the community answered
(13 responses)- A8% (1)
- B92% (12)
Explanation
DNS (Domain Name System) is the service responsible for resolving human-readable domain names (e.g., www.example.com) to IP addresses. Without a DNS record mapping the domain name to the application's external IP address, browsers cannot locate the server. A reverse proxy (A) can route incoming HTTP requests to backend services, but it does not perform the domain-name-to-IP translation. A firewall (C) controls traffic flow based on security rules. A load balancer (D) distributes traffic among multiple servers. All three can be useful in a production setup, but DNS is the foundational requirement for URL-based access via a domain name.
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