CompTIA Tech+ (FC0-U71)InfrastructureMedium
A user types www.comptia.org into a browser. Which network service translates this domain name into an IP address so the browser can locate the server?
- ADNS
- BFTP
- CNAT
- DDHCP
Show answer & explanationAnswer & explanation
Correct answer: A. DNS
DNS (Domain Name System) resolves human-readable domain names into numeric IP addresses that computers use to locate servers. DHCP assigns IP addresses to devices, FTP transfers files, and NAT translates private to public addresses.
Why the other options are wrong
- B. FTP is a protocol for transferring files.
- C. NAT translates private IP addresses to public ones.
- D. DHCP assigns IP addresses to devices on a network.
DNS (Domain Name System)
A hierarchical naming system that translates human-readable domain names into IP addresses.
- Acts like the internet's phone book
- Uses DNS servers to resolve names
- Port 53 for DNS queries
- Works with caching to speed resolution
Memory trick: DNS is the internet's phonebook, translating names to numbers.