DNS in Detail Quiz
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- Q1
What is the primary role of DNS (Domain Name System)?
To manage email services for a domain
To translate domain names into IP addresses
To secure websites with SSL certificates
To store website data and files
60s - Q2
What happens first when you request to visit a website by entering its domain name in a browser?
The browser connects directly to the website without DNS involvement
The computer checks its local cache for the IP address
A request is sent directly to the Root DNS Server
The authoritative DNS server is immediately queried
60s - Q3
If the Recursive DNS Server cannot find a cached record for a domain, what is the next step?
It queries the authoritative server directly
It pings the domain to resolve the IP
It sends the request to the client’s local machine
It contacts the Root DNS Server
60s - Q4
What is the purpose of the TTL (Time To Live) value in DNS records?
To control the speed at which websites load
To indicate the time it takes to reach a website
To define how long an IP address is valid for a domain
To limit the number of DNS requests a user can make
60s - Q5
Which DNS record type maps a domain name to an IPv4 address?
AAAA Record
A Record
MX Record
CNAME Record
60s - Q6
What is the difference between an A Record and an AAAA Record?
AAAA Records point to mail servers, while A Records point to websites
A Records point to IPv4 addresses, while AAAA Records point to IPv6 addresses
A Records only work with subdomains, while AAAA Records work with primary domains
AAAA Records point to backup IP addresses for failover
60s - Q7
Which DNS record type points one domain or subdomain to another domain name instead of an IP address?
CNAME Record
NS Record
PTR Record
MX Record
60s - Q8
What is the primary function of an MX Record in DNS?
To list authorized mail servers for security
To specify mail servers for email routing
To provide the IP address for a website
To point subdomains to another domain
60s - Q9
Which DNS record is used to store arbitrary text data, often for security purposes like SPF or domain verification?
AAAA Record
TXT Record
A Record
CNAME Record
60s - Q10
If the primary mail server listed in an MX Record is unavailable, what happens next?
The email is routed to the next available mail server with a higher priority number
The email waits until the primary server is back online
The email is discarded
The email is automatically converted into a TXT Record
60s - Q11
What does the Recursive DNS Server do if it cannot resolve a DNS query from its cache?
It forwards the query to the Root DNS Server
It queries the client’s machine for the answer
It sends the request directly to the website
It returns an error to the user
60s - Q12
Why are DNS records cached on recursive servers and local machines?
To reduce the time and load required for DNS lookups
To ensure only mail records are updated
To prevent DNS record updates
To avoid errors in IP address resolution
60s - Q13
The DNS record that maps a domain to an IPv4 address is called an _______ record
Users enter free textType an Answer60s - Q14
An _______ record connects a domain to an IPv6 address, which supports a larger pool of IP addresses.
Users enter free textType an Answer60s - Q15
A _______ record points one domain or subdomain to another domain name instead of an IP address.
Users enter free textType an Answer120s