Podcast
Questions and Answers
Where is the first location checked for a requested DNS record?
Where is the first location checked for a requested DNS record?
- ISP DNS recursive resolver
- Operating system
- Stub resolver
- Browser cache (correct)
What is the process inside the operating system that handles DNS queries?
What is the process inside the operating system that handles DNS queries?
- Browser cache
- DNS client (correct)
- Stub resolver
- ISP DNS recursive resolver
Where does a stub resolver send a DNS query if it doesn't have the record in its cache?
Where does a stub resolver send a DNS query if it doesn't have the record in its cache?
- Operating system
- Authoritative DNS server
- Browser cache
- ISP DNS recursive resolver (correct)
What do DNS records provide information about for a domain?
What do DNS records provide information about for a domain?
What is the purpose of DNS syntax in DNS records?
What is the purpose of DNS syntax in DNS records?
Where do authoritative DNS servers store DNS records?
Where do authoritative DNS servers store DNS records?
What is the purpose of DNS caching?
What is the purpose of DNS caching?
Where does DNS caching occur?
Where does DNS caching occur?
What is the purpose of setting a time-to-live (TTL) for DNS records?
What is the purpose of setting a time-to-live (TTL) for DNS records?
Why do modern web browsers cache DNS records?
Why do modern web browsers cache DNS records?
Which scenario describes DNS caching?
Which scenario describes DNS caching?
How does DNS caching help in reducing load times?
How does DNS caching help in reducing load times?
What type of query requires a DNS server to respond to the client with either the requested resource record or an error message?
What type of query requires a DNS server to respond to the client with either the requested resource record or an error message?
Which query type allows a DNS server to return the best answer it can, or if there's no match, a referral to an authoritative server for a lower level of the domain namespace?
Which query type allows a DNS server to return the best answer it can, or if there's no match, a referral to an authoritative server for a lower level of the domain namespace?
What is the purpose of caching resolvers in the DNS process?
What is the purpose of caching resolvers in the DNS process?
In which scenario would a DNS name server return a non-recursive query?
In which scenario would a DNS name server return a non-recursive query?
Why might using a combination of recursive and iterative queries optimize the DNS resolution process?
Why might using a combination of recursive and iterative queries optimize the DNS resolution process?
If a queried DNS server does not have a match for the query name, what will it do in an iterative query scenario?
If a queried DNS server does not have a match for the query name, what will it do in an iterative query scenario?
