100-140 Question 193
Single answerA user reports that they are unable to access a website using its domain name, but they can access it when entering the website's IP address directly. What is the most likely purpose of the Domain Name System (DNS) in this scenario?
- A
To translate domain names into IP addresses for network communication
- B
To assign IP addresses dynamically to devices on the network
- C
To monitor and log web traffic for security purposes
- D
To provide encryption for secure web communication
Show answer and explanation
Correct answer: A
Explanation
The Domain Name System (DNS) is a core network service that resolves domain names into IP addresses, enabling users to connect to websites and services using human-readable names instead of numeric IP addresses. In this scenario, the user's issue highlights the DNS's critical role in translating domain names into the correct IP addresses.
- A. Correct.
DNS translates human-friendly domain names (e.g., www.example.com) into machine-readable IP addresses (e.g., 192.168.1.1), which allows users to access websites without needing to remember numerical addresses.
- B. Incorrect.
This describes the role of DHCP (Dynamic Host Configuration Protocol), not DNS. DHCP assigns IP addresses dynamically to devices.
- C. Incorrect.
Monitoring and logging web traffic is typically handled by firewalls or intrusion detection systems, not DNS.
- D. Incorrect.
Encryption for secure web communication is handled by protocols like HTTPS, not DNS.