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DNS

What does DNS stand for?
Domain Name System
Dynamic Network Service
Data Naming Service
Digital Network Security
Which protocol is commonly used by DNS?
UDP
TCP
HTTP
FTP
What is the purpose of a DNS resolver?
To convert domain names into IP addresses
To cache DNS records for faster lookups
To encrypt DNS traffic for security
To manage DNS zones and records
Which record type is used to map an IPv4 address to a domain name?
A
CNAME
MX
TXT
What is the maximum length of a fully qualified domain name (FQDN)?
255 characters
128 characters
512 characters
1024 characters
Which DNS record type is used to specify mail servers for a domain?
MX
NS
SOA
PTR
What is the purpose of a DNS root server?
To provide the authoritative answer for top-level domains
To maintain the global DNS hierarchy
To resolve DNS queries for all internet users
To manage DNS zones for individual domains
Which DNS record type is used to map an IPv6 address to a domain name?
AAAA
A
CNAME
TXT
What is the purpose of a DNS cache?
To store recently resolved DNS records for faster lookups
To reduce network traffic by serving cached responses
To improve DNS resolution performance
To manage DNS zones and records
Which DNS record type is used to verify domain ownership for email authentication?
TXT
SPF
DKIM
DMARC
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