DNS, standing for Domain Name Service, acts like a look-up table, with which a user can make the correct servers be contacted by entering a URL into a Web browser. with the rise of DDoS attacks, making use of a reliable DNS hosting service seems especially significant to the redundancy of a website, as there is nothing worse for visitors than the website being inaccessible.
What is DNS?
A Domain Name System, essentially, is the phone book for all networks. Whether you realize it or not, every time you’re surfing the web, you are using DNS hosting service. Due to it, you will never need to remember a very long IP address when planning to visit a web site. For instance, instead of remembering an IP address like 126.96.36.199 and every backup IP address it uses for load balancing the traffic, you just need to remember a name like www.bigcheaphosting.com. However, only a few users have awareness of the exist of the DNS hosting service and how it works as they have been a fundamental function to the internet.
DNS comes with several different types of address records, and each serves a different purpose.
A Records: On behalf of the actual IP address of the domain, A Records are the most basic type of syntax used in DNS records. Regular DNS addresses are mapped for 32-bit IPv4 addresses, there are also “AAAA” records that map a hostname to a 128-bit IPv6 address.
MX Records: Some DNS records are also used for routing email around the internet in addition. MX Records usually point to a group of computers that are responsible for receiving mail for the organization.
NS Records: Indicating Name Servers that have the authority for the domain zones they host, NS Records help with replicating the changes in the DNS zone between servers that are responsible for each DNS zone.
PTR Records: Standing for “pointer record”, a PTR Record is used for helping with security on the internet. By doing a reverse DNS lookup once received an email, your system tries to find out what domain name the email came from using PTR Records and whether the server is registered as an email server through comparing it with the MX Records.
CNAME Records: Also known as Canonical Name Records, this type of DNS records serve to make one domain an alias of another domain. CNAME Records are usually used to associate new subdomains with an existing domain’s DNS records.
SRV Records: A SRV Record matches up a specific service that runs on your domain (or subdomain) to target domain. You can use this DNS records to direct traffic for specific services, like instant messaging, to another server.
SOA Records: An SOA Record or Start of Authority Record labels a zone like with the name of the host where it was originally created. Next, it lists the contact email address for the person responsible for the domain.
Besides the above, there are also other types of DNS records, like SPF Records, TXT Records, DKIM Records, AXFR Records, and more.
Benefits of Using DNS Service
DNS service is so essential that without it the internet would be an inconvenient world to access. There are many benefits of DNS service, some of which contain:
All DNS servers are ensured to be monitored on a daily basis and configured with the latest security patches so as to protect your data from being accessed by hackers or unwanted people.
DNS providers allow you to manage your DNS servers, account, as well as domains via an easy-to-use and highly secured interface. What you need is a well-performed computer, an internet connection, and a web browser.
A DNS server comes in great flexibility in usage. It is possible for you to manage multiple internet domains and subdomains with only a single DNS server.
Don’t worry about maintaining the DNS servers even if you are a non-technique savvy. There are many user-friendly control DNS software that you can use to help with DNS server maintenance.
Things You Should Know When Choosing A DNS Provider
As with the importance and popularity of DNS service dramatically growing up, a large group of new DNS hosting service providers have sprung up on the market. These providers maintain the “phonebook” and translate your request into its corresponding IP address. If your DNS provider fails to resolve your request in a correct way, or redirects your browser to malware for malicious purposes, then your website, application or other systems may get stuck in serious problems. As well, if a URL cannot be resolved well, it will be displayed as an error or a blank page on your browser.
Besides choosing from big brands for reliable credibility, you should also consider the following terms:
Primary and Slave Servers
There could be various terms to describe the relationships between different DNS servers, but generally, people use primary and slave to define their functionality. Just like storing a backup for the files on your computer on an external hard drive in your house, it is possible for you to lose both of them once there is a fire. A common approach to solve the problem in DNS field is configuring one DNS provider as primary and the other as secondary and making the second one slave to the primary provider.
Actually, there is nothing special about power combined with the primary DNS and the slave DNS as both of them are authoritative for the zones they are in charge of. The only factor differentiating these two types of DNS servers should be where they read their files from. Primary DNS servers read the zone files from the system’s disk, while the slave servers receive via a zone transfer from a primary server for the zone.
Public and Private Servers
Mostly, an organization uses DNS service both internally and externally. All public DNS queries for the domains and zones might be handled by a DNS server that features with an externally available authoritative only. While all the additional information about internal hosts and services plus the authoritative information which offered by the public DNS would be dealt with a separate DNS server.