TestOut LabSim A+ Certification Practice Exam

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Which protocol is primarily used for translating domain names into IP addresses?

FTP
DHCP
DNS
HTTP

The correct answer is: DNS

The correct choice is DNS, which stands for Domain Name System. This protocol is essential for the functioning of the internet as it translates user-friendly domain names like www.example.com into their corresponding numerical IP addresses, such as 192.0.2.1. This translation is necessary because, while humans find it easier to remember and use domain names, computers and networking equipment operate using IP addresses. When a user enters a domain name in their browser, the DNS protocol is invoked to look up that domain name and return the appropriate IP address. This process allows the user's device to connect to the correct server hosting the requested content. Other options are related to networking but serve different purposes: FTP (File Transfer Protocol) is used for transferring files between computers, DHCP (Dynamic Host Configuration Protocol) is responsible for automatically assigning IP addresses to devices on a network, and HTTP (Hypertext Transfer Protocol) is the protocol used for transferring web pages over the internet. Each of these protocols plays a crucial role in network functionality, but only DNS specifically addresses the translation of domain names to IP addresses.