When you open a web browser and type in the hostname www.company.com, your computer needs a way to find the IP address used by the server. That method uses the Domain Name System (DNS).

(A) TRUE
(B) FALSE

Answer:

TRUE is the correct answer.

The Domain Name System (DNS) is the phonebook of the Internet. Humans access information online through domain names, like examsdigest.com or youtube.com. Web browsers interact through Internet Protocol (IP) addresses. DNS translates domain names to IP addresses so browsers can load Internet resources. Each device connected to the Internet has a unique IP address that other machines use to find the device. DNS servers eliminate the need for humans to memorize IP addresses such as 192.168.1.1 (in IPv4), or more complex newer alphanumeric IP addresses such as 2100:bb22:3272:1::2133:b1a4 (in IPv6).

DNS records are instructions that live in authoritative DNS servers and provide information about a domain including what IP address is associated with that domain and how to handle requests for that domain. These records consist of a series of text files written in what is known as DNS syntax. DNS syntax is just a string of characters used as commands which tell the DNS server what to do.

The most common types of DNS are:
A is used to map hostnames to an IPv4 address of the host.
AAAA is used to map hostnames to an IPv6 address of the host.
CNAME is used to point a domain or subdomain to another hostname.
SRV is used to identify computers that host specific services.
MX is used to help route emails.
TXT is used to provide the ability to associate text with a zone.
NS indicates which DNS server is authoritative for that domain.
PTR is used for the Reverse DNS (Domain Name System)lookup.