DNS
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Do you have experience with managing DNS serverS?
Yes Im well experienced in install setup and manage DNS servers
Forward lookup and reverse lookup?
> Forward DNS lookup is using an Internet domain name to find an IP address. Reverse DNS lookup is using an Internet IP address to find a domain name.
How DNS resolution works?
- Whenever we type a domain name in browser it first check for any Browser cache available, if available load the website from it. if not,
- It will check for aan IP locally. Espeecially in hosts file whether there is any direct entry available in this file for website. If it is available, the website directly check for apache in server whch is mentioned in hosts file by bypassing any DNS checks,
- If there is no hosts file entries, it Contact ISP and its Recursive DNS Server to Resolve a Domain Name
- ISP DNS resolvers are configured to ask other DNS servers for correct IP address mapping until they can provide data back to the requester
- Once the ISP’s recursive DNS server obtains the IP address by sending multiple iterative DNS queries, it finally returns it to your computer.