WGU D281 EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2025-2026
A record (Address Record) - Answers Maps a domain name to an IPv4 address.
AAAA Record (IPv6 Address Record) - Answers Maps a domain name to an IPv6 address.
CNAME record (canonical name record) - Answers Creates an alias from one domain name to
another, essentially pointing to another record
MX Record (Mail Exchange Record) - Answers Specifies the mail server responsible for
accepting emails for a domain.
NS Record (Name Server Record) - Answers Indicates which DNS server is authoritative for a
domain.
PTR Record (Pointer Record) - Answers Used for reverse DNS lookups, mapping an IP address
to a domain name.
SOA Record (Start of Authority Record) - Answers Contains administrative information about the
DNS zone.
SRV record (service record) - Answers Specifies the location of servers for specific services
within a domain.
TXT Record (Text Record) - Answers Stores arbitrary text information, often used for things like
email authentication or domain verification
/dev/sd* - Answers The disk names in Linux are alphabetical. /dev/sda is the first hard drive
(the primary master), /dev/sdb is the second etc. The numbers refer to partitions, so /dev/sda1
is the first partition of the first drive.
Linux Drivers - Answers software components that enable the operating system to interact with
hardware devices
host command - Answers to query Domain Name System (DNS) servers. provides a more
concise and readable output, often just showing the IP address associated with a domain name.
dig command linux - Answers displays the full DNS response, including the question, answer,
authority, and additional sections.
nslookup command - Answers Displays information about DNS names and their corresponding
IP addresses, and it can be used to diagnose DNS servers.
/etc/resolv. conf - Answers dns is configured on a Linux machine
stdin (Standard Input) - Answers the file descriptor 0, and it allows programs to receive input
from the user or other sources.
A record (Address Record) - Answers Maps a domain name to an IPv4 address.
AAAA Record (IPv6 Address Record) - Answers Maps a domain name to an IPv6 address.
CNAME record (canonical name record) - Answers Creates an alias from one domain name to
another, essentially pointing to another record
MX Record (Mail Exchange Record) - Answers Specifies the mail server responsible for
accepting emails for a domain.
NS Record (Name Server Record) - Answers Indicates which DNS server is authoritative for a
domain.
PTR Record (Pointer Record) - Answers Used for reverse DNS lookups, mapping an IP address
to a domain name.
SOA Record (Start of Authority Record) - Answers Contains administrative information about the
DNS zone.
SRV record (service record) - Answers Specifies the location of servers for specific services
within a domain.
TXT Record (Text Record) - Answers Stores arbitrary text information, often used for things like
email authentication or domain verification
/dev/sd* - Answers The disk names in Linux are alphabetical. /dev/sda is the first hard drive
(the primary master), /dev/sdb is the second etc. The numbers refer to partitions, so /dev/sda1
is the first partition of the first drive.
Linux Drivers - Answers software components that enable the operating system to interact with
hardware devices
host command - Answers to query Domain Name System (DNS) servers. provides a more
concise and readable output, often just showing the IP address associated with a domain name.
dig command linux - Answers displays the full DNS response, including the question, answer,
authority, and additional sections.
nslookup command - Answers Displays information about DNS names and their corresponding
IP addresses, and it can be used to diagnose DNS servers.
/etc/resolv. conf - Answers dns is configured on a Linux machine
stdin (Standard Input) - Answers the file descriptor 0, and it allows programs to receive input
from the user or other sources.
