DNS stands for Domain Name System. It is the phonebook of the internet. With the help of DNS, human beings can get access to information. Web browsers get information from the IP addresses. DNS provides enough information about the domain names to the IP addresses. After getting information about the domain names from DNS, browsers load internet resources. A device which is connected to the internet has a unique IP address. The other devices use this unique IP address to find this device. This IP address is in the form of numbers. With the help of DNS, human beings don’t need to remember these IP addresses.
If we want to learn DNS, we have to remember some DNS terminologies. Some essential DNS terminologies are given below;
- Domain Names: It is a human-readable name of a domain. An example of a domain name is google.com. We can type this domain name in the URL field of the web browser. ICANN manages these domain names.
- Top-level Domain: TLD refers to the last name of the domain. In the above example google.com, .com is the TLD of this domain. There are also some country-code TLDs. These country code TLDs provides an idea about a specific location. Some essential examples of the TLDs are .com, .gov, .edu and .org etc.
- Second Level Domain: The part of a domain name that comes before the TLD is known as the second-level domain. In the google.com, Google is the second-level domain.
- Subdomain: It is used to identify the unique content area of a website. For example, if you want to find ‘aws’ in the amazon.com, you can type aws.amazon.com in the web browser.
- Domain Name Register: To manage the reservoirs of the domains, we can’t deny the importance of the domain name registers. ICANN grants permission to the organizations to work as domain name registers.
- Name Server: In a phonebook, we have to save all the contact numbers along with their names. Name server also works just like a phonebook. It is a collection of the domain names and these domain names are matched to the IP addresses.
DNS Record Types
There different types of DNS records. These types are explained below;
- A Record: In the A Record, you can find address records. A Record maps the IP address of a server to the domain name.
- CNAME: In the CNAME records, we have to establish the record of a domain as an alias to another domain.
- Alias Record: We can also use Alias record just like CNAME record. It means that we can use it to map one address with another address. Anyhow, the alias records can co-exist with the other records. These records co-exist by using the same name.
- MX Record: MX Record stands for Mail Exchange record. We can use these records to redirect the email of domain with the hosting of the user accounts of the domains. We can also use these records for determination of the priority of the email servers for a specific domain name.
How DNS Works?
After understanding these essential terms which are associated with the DNS, here experts of a dissertation help firm will provide an idea about working of DNS. When a user types the human-readable address of a website in the web browser, the client DNS of the operating system checks this information in the local cache. If it finds requested information in the local cache, it shows the required results. If it doesn’t find the requested information in the local cache, it will look for this information in the DNS server in the local LAN. If the requested information is found in the local LAN, it will show the requested results. If the requested information is not found in the local LAN, it will send a request to the DNS cache server. This is provided by the ISP. It has a temporary store of the domain names. Therefore, it provides a quick response to the requests of the users.
How To Change DNS Setting?
We can change the DNS settings on our operating systems. You will have to follow different procedures to change DNS settings on different operating systems. If you want to change DNS settings on the windows, you will have to follow the following steps;
- First of all, you will have to go into the ‘Control Panel’ on your PC.
- In the control panel, you will see lots of options. You will have to click on the ‘Network and Internet’. After that, you will have to click on the ‘Network and Sharing Center’. At last, you will have to click on the ‘Change Adapter Setting’.
- Now, you will have to select the option for which you want to configure the DNS settings. If you want to change these settings for the ethernet, you will have to click on the ethernet interface and select the properties. If you want to change DNS setting for the wireless connection, you will have to click on the Wi-Fi interface and you will have to select the properties. When you change these settings, you will be asked to type the password. You should type the password for the confirmation.
- Now, you will have to select the networking tab. For this reason, you should select the ‘Internet Protocol Version 4’ and ‘Internet Protocol version 6’. After clicking on it, you should click on the properties.
- After that, you should click on the ‘Advanced’ option. After that, you should select the ‘DNS’ tab. If there exist IP addresses, you should write them down for the reference. After that, you should remove these IP addresses.
- After removing the IP addresses, you should click on the ‘OK’.
- Now, you will have to click on the ‘Use the following DNS server addresses’ tab. If you see some IP addresses, you should note down these IP addresses for reference in the future.
- Now, you will have to replace these IP addresses with the DNS servers of Google.
- After that, you will have to test these IP addresses.
- If you want to change IP addresses for the additional network connections, you should repeat the same procedure.