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If a client send a query requesting for a particular web page to the DNS server and if the DNS server resolves the page from the other DNS servers & it will be store the same page in the DNS cache and it will give the response to the client with the requested page. If again the same web page is requested by any client then DNS server will get the web page from the DNS cache instead of again fetching the same page from the internet. With this there wont be any delay for the client to get the web page. This helps in bandwidth control. This is how the DNS server caching works.
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What can be gained by using a caching only dns server?
Using a caching only DNS server has an easier set up. Also, using this type of DNS server can transfer information more securely if proper security measures are in place.
Which dns server configuration does not host any zones locally?
caching-only server
What type of DNS server is typically maintained by an ISP?
caching-only
When you implement a caching-only DNS server for the first time is the cache server empty?
Yes....As the server starts to service client requests, the information is cached and builds with time.
Which two tasks are the responsibility of the local DNS server?
mapping name-to-IP addresses for internal hosts forwarding name resolution requests to a caching-only server
Can you install proxy server or web caching server?
Can you install proxy server or web caching server?And why do we do it?
What is the difference between a preferred DNS server and an altenate DNS server?
What is the difference between a preferred DNS server and an altenate DNS server?Read more: http://wiki.answers.com/What_is_the_difference_between_a_preferred_DNS_server_and_an_altenate_DNS_server#ixzz2LRd3ICed
What are authoritative dns server and none authoritative dns server?
authoritative dns server is server that has own databases that has name resolution for the clients that for resolve from name to ip address and for ip address to name. non-authorititative dns server is server that forward request of dns client to authoritative dns server for resolve.
When was Unbound - DNS Server - created?
Unbound - DNS Server - was created in 2007.
What is primary DNS server?
The primary DNS server is usually the same as the router's IP adress.
When would a dns server contact a root server?
If a DNS server cannot find the answer to the DNS Query in its own database it will first query the forwarders (if there are any configured) and then ask the root server. root servers (by default) are the master DNS servers of the Internet.
What is the DNS server in which changes are made for a particular zone and then propagated to other DNS servers?
The prefered DNS server for the site is the server which sends the dns zone updates to all the other servers in the site. The primary DNS zone is created on the server and it has the authority to send changes in zone to other servers
