Question

What is the local DNS server position DNS hierarchy?

Answer 1

Local DNS - A local DNS server is a server which is setup inside of a company or homes network for use by other clients on the network. Instead of using something like Google Public DNS, you’re able to setup your own local DNS server, so that all of the other clients on the network receive their network settings and activity to your server, as opposed to someone else’s.

    When a domain controller is being setup, this can also count as the local DNS server, since most/all clients need to be joined to that domain, their DNS will need to be changed to the IP of the domain controller, effectively using this server as their local DNS server.

DNS Hierarchy

The DNS hierarchy is comprised of the following elements:

1) Root Level

2) Top Level Domains

3) Second Level Domains

4) Sub-Domain

5) Host

DNS Root Zone

The DNS root zone is the highest level in the DNS hierarchy tree. The root name server is the name server for the root zone. It answers the requests for records in the root zone and answers other requests by providing a list of authoritative name servers for the appropriate TLD (top-level domain). The root name servers are very important because they are the first step in resolving a domain name.

Top Level Domains

The next level in the DNS hierarchy is Top level domains. There are many TLDs available at the moment. As we have seen the TLDs are classified as two sub categories. They are organizational hierarchy and geographic hierarchy. Let us see each in detail.

Second Level Domains

The next level in the DNS hierarchy is the Second Level Domains. This is the domain that is directly below the tld. This is the main part of the domain name. It can vary according to the buyer. There are no limits here as the tlds. Once the domain is available anyone can purchase it.

Sub-domain

The sub-domain is the next level in the DNS hierarchy. The sub-domain can be defined as the domain that is a part of the main domain. The only domain that is not also a sub-domain is the root domain. Suppose two domains.