| Posted in A Record , DNS Query , Forward lookup , MX Record , NSLOOKUP , PTR Record , Recursion , Reverse Lookup | Posted on
Forward Lookup - Resolves host-names or FQDN to ip address
Consists of (A) Records
Reverse Lookup - Resolves ip addresses to Host name or FQDN
Consists of (PTR) Records
FQDN = Fully Qualified domain Name
Order of DNS query
1)client checks for hosts file or local resolver cache
2)If not found sends a DNS query to server
3)Server Checks
4)If no match is found, it performs a recursion or Iterations
What is Recursion - A recursion is a when a DNS is unable to query the client it sends or queries other DNS servers for a resolution.
Reverse Lookup - Resolves ip addresses to Host name or FQDN
Consists of (PTR) Records
FQDN = Fully Qualified domain Name
Order of DNS query
1)client checks for hosts file or local resolver cache
2)If not found sends a DNS query to server
3)Server Checks
4)If no match is found, it performs a recursion or Iterations
What is Recursion - A recursion is a when a DNS is unable to query the client it sends or queries other DNS servers for a resolution.
