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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 are the key differences between DNS poisoning and DNS hijacking, and how do they impact the security of a network?
DNS poisoning involves corrupting the DNS cache with false information, redirecting users to malicious websites. DNS hijacking involves redirecting DNS queries to a different server, allowing attackers to control traffic. Both can compromise network security by leading users to fake websites or intercepting sensitive data.
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 command can be used to flush the local DNS cache on a Windows computer?
To flush the local DNS cache on a Windows computer, you can use the command ipconfig /flushdns. Open the Command Prompt as an administrator, type the command, and press Enter. This action clears the DNS resolver cache, potentially resolving issues related to outdated or incorrect DNS entries.
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
Where are the DNS records stored?
DNS records are stored in DNS servers, which are part of a distributed network that manages domain name resolution. These servers can be authoritative, containing the definitive records for a domain, or caching, temporarily storing records retrieved from authoritative servers. When a user queries a domain, the DNS resolver checks its cache first and, if not found, queries the appropriate authoritative DNS server to fetch the records.
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>
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>
What commands can you use to display the DNS cache on a Windows DNS client?
ipconfig /flushdns
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
If you can ping 8.8.8.8 but you cannot ping www.Google.com then what is the problem?
If you can ping 8.8.8.8 but not www.google.com, the issue likely lies in DNS resolution. Your network can reach the Google Public DNS server (8.8.8.8) directly, but it may not be able to translate the domain name www.google.com into its corresponding IP address. This could be due to a misconfigured DNS server, connectivity issues with the DNS service, or problems with the local DNS cache.
