CompTIA Network+ Practice Test

What primary function do DNS servers serve in network communications?

1. Store files for web hosting

2. Resolve domain names to IP addresses

3. Secure network transmissions

4. Manage database transactions

The correct answer is: Resolve domain names to IP addresses

DNS servers primarily function to resolve domain names to IP addresses. This process is essential for enabling users to access websites and services using easily memorable names instead of having to remember numerical IP addresses. When a user types a web address (such as www.example.com) into their browser, the DNS server translates that domain name into its corresponding IP address, allowing the browser to connect to the correct server and retrieve the requested page or resource. This name resolution is crucial for the seamless functioning of the internet and network communications, as it allows for easier navigation and interaction with online resources. Without DNS, users would be forced to enter complex numerical addresses, significantly hindering the usability of the internet. Other options, such as storing files for web hosting or managing database transactions, describe functions that are handled by web servers or database servers, respectively, rather than DNS servers. Additionally, while securing network transmissions is important, that role typically belongs to different protocols and devices designed specifically for encryption and security, rather than to DNS servers.