Why is caching important in DNS resolution?
World of Computer Networking Your CCNA start - Domain Name System (DNS) Query Resolution Caching Process

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Information Technology (IT), Architecture
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To increase the load on root name servers
To avoid using authoritative name servers
To delay every DNS request
To reduce delays and server load
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which cache is used first when a web browser repeats a DNS query?
DNS recursive resolver cache
Root name server cache
Web browser cache
Operating system cache
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens if a DNS resolver has an S record cached for a domain?
It queries the root name server
It queries the TLD name server
It sends a request to the web browser cache
It directly queries the authoritative name server
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why must DNS cache have a specific time to live?
To prevent any DNS updates
To allow DNS records to change frequently
To keep data up-to-date and accurate
To ensure data remains obsolete
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How long did DNS record updates take several years ago?
A few days
Up to 24 hours
Several minutes
A few seconds
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