WGU D281 EXAM QUESTIONS WITH
100% CORRECT ANSWERS LATEST
VERSION 2025/2026.
A record (Address Record) - ANS Maps a domain name to an IPv4 address.
AAAA Record (IPv6 Address Record) - ANS Maps a domain name to an IPv6 address.
CNAME record (canonical name record) - ANS Creates an alias from one domain name to
another, essentially pointing to another record
MX Record (Mail Exchange Record) - ANS Specifies the mail server responsible for accepting
emails for a domain.
NS Record (Name Server Record) - ANS Indicates which DNS server is authoritative for a
domain.
PTR Record (Pointer Record) - ANS Used for reverse DNS lookups, mapping an IP address to a
domain name.
SOA Record (Start of Authority Record) - ANS Contains administrative information about the
DNS zone.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, SRV record (service record) - ANS Specifies the location of servers for specific services within
a domain.
TXT Record (Text Record) - ANS Stores arbitrary text information, often used for things like
email authentication or domain verification
/dev/sd* - ANS 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 - ANS software components that enable the operating system to interact with
hardware devices
host command - ANS 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 - ANS displays the full DNS response, including the question, answer,
authority, and additional sections.
nslookup command - ANS Displays information about DNS names and their corresponding IP
addresses, and it can be used to diagnose DNS servers.
/etc/resolv. conf - ANS dns is configured on a Linux machine
stdin (Standard Input) - ANS the file descriptor 0, and it allows programs to receive input
from the user or other sources.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
100% CORRECT ANSWERS LATEST
VERSION 2025/2026.
A record (Address Record) - ANS Maps a domain name to an IPv4 address.
AAAA Record (IPv6 Address Record) - ANS Maps a domain name to an IPv6 address.
CNAME record (canonical name record) - ANS Creates an alias from one domain name to
another, essentially pointing to another record
MX Record (Mail Exchange Record) - ANS Specifies the mail server responsible for accepting
emails for a domain.
NS Record (Name Server Record) - ANS Indicates which DNS server is authoritative for a
domain.
PTR Record (Pointer Record) - ANS Used for reverse DNS lookups, mapping an IP address to a
domain name.
SOA Record (Start of Authority Record) - ANS Contains administrative information about the
DNS zone.
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, SRV record (service record) - ANS Specifies the location of servers for specific services within
a domain.
TXT Record (Text Record) - ANS Stores arbitrary text information, often used for things like
email authentication or domain verification
/dev/sd* - ANS 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 - ANS software components that enable the operating system to interact with
hardware devices
host command - ANS 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 - ANS displays the full DNS response, including the question, answer,
authority, and additional sections.
nslookup command - ANS Displays information about DNS names and their corresponding IP
addresses, and it can be used to diagnose DNS servers.
/etc/resolv. conf - ANS dns is configured on a Linux machine
stdin (Standard Input) - ANS the file descriptor 0, and it allows programs to receive input
from the user or other sources.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
