CompTIA Network+ Practice Test

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Study for the CompTIA Network+ Exam. Enhance your skills with flashcards and multiple choice questions, each with explanations. Prepare effectively for your certification exam!

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Which record type allows you to modify the mapping of host names to IP addresses?

CNAME
A
SOA
TXT

The correct answer is: A

The correct answer is the A record. An A record, or Address Record, is a fundamental component of the Domain Name System (DNS) that directly maps a domain name to an IPv4 address. When a client requests a hostname, it queries the DNS, and the A record provides the corresponding IP address, enabling proper routing of requests to the correct server. The significance of the A record lies in its ability to establish a straightforward relationship between a hostname and its associated IP address, making it essential for website accessibility and email routing. Changes to the A record allow network administrators to reroute traffic to different servers simply by updating the associated IP address, thus modifying how users access services on the network. In contrast, while a CNAME record serves to alias one hostname to another, it does not itself specify an IP address. The SOA (Start of Authority) record provides metadata about the domain, such as the DNS server that is authoritative for the domain and various timers for the DNS zone. The TXT record, on the other hand, is used for holding text information regarding a domain, which can include verification details for services like email but does not directly facilitate the mapping of hostnames to IPs.