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What is the correct order in which a DNS client tries to resolve names?
Cache,Host Files, DNS server
What is Ipconfig allocate?
In Microsoft Windows Server 2003, you run the ipconfig /displaydns command to display the content of the DNS resolver cache. However, the results are incomplete. When this problem occurs, you do not receive a message.This problem occurs if there are too many entries in the DNS resolver cache. Typically, this problem occurs when there are too many custom entries in the Hosts file.This problem occurs when an allocated buffer is not large enough to contain all the contents of the DNS resolver cache. When the Ipconfig.exe tool allocates memory, it does not consider the DNS entries in the Hosts file.LINK Below
What is the purpose of caching in DNS?
When the web browser wants to load a web page, it needs to contact a DNS server first, which will translate the URL address into a machine readable format - the IP address. Even though the translation takes only a few hundred milliseconds each time a message is sent, these can add up over time, as the number of requests can easily reach hundreds or thousands of DNS queries. DNS servers can sometimes be unavailable and the responses to queries can be very slow. To speed up this process is to cache the information locally thereby eliminating the need for repetitive queries to the remote DNS server. This is done by telling PostCast Server to contact a local database on your computer, rather than the remote DNS server. This local connection can be performed much faster and does not depend on the response time of the remote DNS server across the Internet. PostCast Server contacts the remote DNS server once, and then caches (memorizes) the addresses returned from the query. So the next time you are requesting the same domain.com address, it instantly returns the answer, without having to contact your ISP's DNS server to ask it for the translation. The process is much faster, since it does not have to connect to any remote servers every time. Basically, the logic behind the DNS cache feature is to include both bad and good domains in the list and use the "Valid" column to mark them as valid. The domain is considered bad only if DNS server returns the "Unresolved" error, which means that the DNS entry for that domain does not exist.
What is a Local DNS server's purpose?
A local DNS server's purpose is to host a database and provide access to that database for those within a certain area. It may be within an office building or headquarters.
What system translates names to IP addresses?
The DNS (Domain Name System).The DNS (Domain Name System).The DNS (Domain Name System).The DNS (Domain Name System).
Where does a DNS server look first to resolve a query?
Local DNS cache of client computer, then the hosts file on the local PC finally going to the assigned DNS servers the computer is pointing to
Clear dns cache?
If this for a DNS server, use the command "dnscmd" with options. eg: dnscmd dnssvr1.contoso.com /clearcache To clear DNS Cache in client, do the following: 1. Start 2. Run 3. Type "cmd" and press enter 4. In the command window type "ipconfige /flushdns" 5.a If done correctly it should say "Successfully flushed the DNS Resolver Cache." 5.b If you receive an error "Could not flush the DNS Resolver Cache: Function failed during execution.", follow the Microsoft KB Article 919746 to enable the cache. The cache will be empty; however, this will allow successful cache-flush in future.
How would you instruct a Linux system to use the local networks dns cache located at 192.168.1.254 or the isps dns cache located on 1.2.3.4 if the lan nameserver is unavailable?
Tree files to check on.etcman host.conf will tell you about the orderoptionetcIs for static dns resolveetcthe file for all your dns needsthen edit:/etc/resolv.confadd the following:nameserver 192.168.1.254nameserver 1.2.3.4
How do you clear the DNS cache on the DNS server?
start -run ipconfig /flushdns
How would you instruct a Linux system to use the local networks dns cache located at 192.168.1.254 or the isp's dns cache located at 1.2.3.4 if the lan nameserver is unavailable?
insert a record to /etc/hosts file. ex:-<ip address>> <hostname.domain.org> <hostname>
How would you instruct a Linux system to use the local networks DNS cache located at 192.168.1.254 or the ISPs DNS cache located at 1.2.3.4 if the LAN nameserver is unavailable?
insert a record to /etc/hosts file. ex:-<ip address>> <hostname.domain.org> <hostname>
What commands can you use to display the DNS cache on a Windows DNS client?
ipconfig /flushdns
How do you activate DNS cache?
Net Start DNSCache
The command to flush the DNS cache kept on the computer is?
In a Windows OS, the command "ipconfig /flushdns" is used to flush the DNS cache. A restart of the computer will also work.
What is the correct order in which a DNS client tries to resolve names?
Cache,Host Files, DNS server
You have configured dns cache only server in windows 2003 you cant find where it keeps the cache you want to make a backup of the cache how should you do?
jump around and it will work out
What if your preferred dns server is blank?
if the preferred dns server is blank then the system takes dns as the host server and try to resolve the entries from its own cache if it is able to do it then finew other wise it will show dns error on the IE page. same thing happens with the resources if its in the cache it will resolve the FQDN to IP othere wise will give error
