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purpose and types of DNS

Paper Type: Free Essay Subject: Information Systems
Wordcount: 1758 words Published: 23rd Sep 2019

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Identify the purpose and types of DNS, including explanations on how       domain names are organised and managed:

IP addresses: IP addresses are network hardware identifiers. With IP addresses, devices can have a communication through another device through an Internet protocol system, such as the Internet. Below is an example of how most IP addresses look.

IP addresses gives networking devices an identity. Just like business addresses which provides identifiable addresses to its specific physical places with a recognizable address, Network devices are separated by IP addresses from each other.

I have to know the exact destination if I want to send a package to my friend in another country. It wouldn’t be sufficient only to post an email that contains a package with his name then want it to get to him. Either number or letter does consist of all IP addresses, not everyone is used for the same objective. Private IP addresses, public IP addresses, static IP and dynamic IP addresses are available.

Parts of URLs

Take this URL into account:

https:/themeisle.com/blog/fix-broken-like-word press/

The first part is the easiest thing to overlook. Probably at the beginning of every URL you are used to see http:/ and https:/ so that you don’t think about it a second time. However, it’s more the significant than you might imagine this element– the’ protocol’ URL.

The first part is the easiest thing to overlook. Probably at the beginning of every URL you are used to see http:/ and https:/ so that you don’t think about it a second time. However, it’s more significant than you might imagine this element– the’ protocol’ URL.

Nevertheless, the Hypertext Transfer Protocol Secure (HTTPS) has been recently implemented in broader terms. While this protocol essentially is the same as HTTP, the encryption of the data between the browser and the server is a much more secure option. That’s why a green security lock is given by most browsers:

Domain names

https:/themeisle.com/blog/fix-broken-like-word press/

This next part is the’ domain name’- the web address that is most identifiable. It’s themeisle.com (our site!) in this case. A name for a specific domain site is an identification that usually takes you to the home page unless you add anything else to it.

The path

All you want is the protocol and domain name: https:/themeisle.com, if you just wanted to visit the front of our website. Every page or file on a site has its own URL, however. However. Here’s what this time looks like once again, as follows: https:/themeisle.com/blog/fix links- in- wordpress/.

Top level domains

Again the exact sound of a top- level domain is a type of the domain name at the top level of the Internet domain name system. Over 1000 TLDs are available but the most frequent are .com, .org,.net and .edu.

Sub domains

Subdomains are valuable, as webmasters do not need a further domain name for their site to create divisions. Instead, they can create a subdomain that indicates a specific server directory effectively. For campus sites and other websites, this can be extremely useful and should be kept separate from the core website. For instance, developers.facebook.com is used by Facebook to provide specific information for web and app developers that are interested in using the Facebook API. Support.google.com is another good instance.

Domain names

The name of your domain is essentially the same as the physical address of your site. Like a street address or zip code, a web browser needs a name for a domain, to direct you to a website. A web browser also needs a domain name for you. Two key elements are a domain name. For example, Facebook.com domain name consists of the name of the site (Facebook) and the extension of the domain name (.com). If a company (or individual) purchases a domain name, it can specify which server the domain name refers to. Domain names work by using the server hosting your website as a shortcut. Anybody who wants to go to your website would have to enter without a domain name.

Recursive Resolvers

The first stop in a DNS query is a recursive resolver (also called a DNS recursor). The recursive resolution is an intermediary between a client and a DNS nameserver. Following receipt of a Web client’s DNS query, a recursive resolver will reply or send a root name server request, followed by a further request to a TLD name server, and then one last request to an authoritative name server. The recursive resolver then sends a client answer after receiving a reply from the authoritative nameserver containing a requested IP address. The recursive resolver caches the information from reputable name servers during this process. When a customer asks for the IP address of a domain name which another customer has requested recently, the resolver can bypass the procedure in which the name servers are communicated by just returning the client to its cache.

Root name servers

Every recursive resolver is familiar with the 13 root DNS servers and is the first stop in the search for DNS records by a recursive resolution. Any recurrent domain name query is accepted by a root server, which redirects the recurrent resolution to one of the domain extension- based TLD nameservers ( .com,.net,.org, etc.).

Top level domain servers

TLD name servers maintain information on every domain name sharing common domain extensions such as .com.

Should a user search for google.com, the recursive resolver would send a query to a .com TLD name server after receiving a root name server response, which would react by pointing to the authoritative name server.

Authoritative name servers

If a recursive resolver gets a response from a TLD nameserver, it will send a resolution to a reputable nameserver. Usually the authoritative name server is the last step in the IP address journey. The authoritative name server includes information for the domain name (e.g. Google.com) and the IP address of the server found in the DNS A record may be given by a recursive resolver or, if the domain has a CNAME record (alias), a recursive resolver may be given with an alias domain at which point the recursive resolver is required to perform a new whole new DNS search for an authoritative name server.

Caching DNS

DNS (sometimes referred to as a DNS resolution cache) is a temporary, computer- based database that records all recent visits and tries to websites and other internet domains. In other words, your computer can only remember the recent DNS searches when it tries to find out how to load the web site.

Authoritative DNS

The authoritative DNS server is the ultimate holder of the IP of the domain you want. A DNS query is sent to your Internet Service Provider (ISP) when you enter a domain name in your browser. The ISP has a recursive server that could contain the necessary information. But if the data is outdated, the IP must be found elsewhere on this recursive server. They are going to attempt to find it on other recursive servers, but if they cannot, the IP of a powerful DNS server must be received.


A DNS forwarder is a DNS server which can resolve queries from other servers that have not been resolved. If you identify a server to forward queries to, that server is the forwarder. Queries often are transmitted to an external DNS server like the DNS server of an ISP. Transferring any unsolved queries to a particular server can reduce security problems because all the external DNS traffic is restricted to one server.

Primary and slave DNS

For reading data related to the domain area, a primary DNS server is responsible. It is also the primary server which communicates with the secondary server. Server administrators, who instruct the server to communicate and interact with other web servers, are specifically designated for the domain area data. A read only copy of the zone data is provided in the Slave zone. The copies of master zones are mostly slave DNS zones. Copies of other slave areas or Active Directory zones may also be available.

Public and private DNS

Private DNS servers reflect your domain name and not our default domain name. All of our customers can benefit from the service in all our plans. The server name default for your account is 1 2 ns1.servername.tld ns2.servername.tld

If you want to resell hosting services or brand your business, it could be helpful to have a private name server. In addition, if a domain name is moved to another server when using private DNS, no name servers are needed, and domain names point to the new location automatically.

An IP address that you can access via the Internet is a public IP address. Just like your mailing address, a public IP address is the world’s unique IP address assigned to a computer unit. You can find your public IP address on my IP address page. On the other hand, private IP addresses are used to designate computers without allowing them to be directly exposed to the Internet in your private space.



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