How Domain Registration Works: A Simple Guide

Domain Registration Explained Simply Enough for a Rabbit

Introduction

We often hear phrases like "I registered a domain" or "I'm running a site on a custom domain," but surprisingly few people know exactly what a domain is, how to get one, and how it works.

Recently, after registering a domain for the first time in a while, I decided to study how it works once again. I discovered that a domain is not just an "address on the internet," but is built on a complex and clever system.

In this article, with the motto of "so simple even a cat can understand it," I will explain the basic concepts of domains, the registration process, and the mechanism of DNS as simply as possible.

What is a Domain?

Basic Concept of Domains

A domain is an identifier that represents the address of a website or server on the internet. The websites we normally use on the internet are actually managed by a series of numbers called IP addresses (e.g., 93.184.216.34). However, since these numerical sequences are difficult for humans to remember, domains represent them using words such as "example.com" or "google.com."

Relationship between IP Addresses and Domain Names

Domain names and IP addresses have a relationship similar to a phone book.

• IP Address: A numerical sequence showing the actual location of a server (e.g., 172.217.25.110)
• Domain Name: A human-friendly name assigned to that IP address (e.g., google.com)

When you enter a domain name into a web browser, a system called DNS is used to look up the IP address corresponding to that domain name and access the actual server.

Hierarchical Structure of Domain Name Space

Domains have a hierarchical structure, and by reading from right to left, you specify a more granular location. This structure is called the "domain name space."

For example, if we break down the domain "www.example.co.jp":

• jp: Top-Level Domain (TLD) representing Japan
• co: Second-Level Domain (SLD) representing a company
• example: The name of a specific company or organization
• www: A subdomain indicating the web server of that organization

Each level is separated by a dot (.). Actually, there is a dot (.) at the very end as well, but it is usually omitted. This dot represents the root, which sits at the top of the tree structure of the domain name space.

How Domain Registration Works

Relationship between Registry and Registrar

There are three main organizations involved when registering a domain:

1. Registry: An organization that maintains the database of domain registration information. One exists for each TLD. For example, Japan Registry Services (JPRS) is responsible for ".jp," while VeriSign handles ".com" and ".net."

2. Registrar: A business that provides domain registration services. This includes companies like Onamae.com, GoDaddy, and MuuMuu Domain. They have contracts with registries, accept domain registration applications from users, and forward them to the registry.

3. ICANN: A non-profit organization responsible for managing domain names and IP addresses for the entire internet. It accredits and supervises registries and registrars.

Workflow of Domain Registration

The flow for acquiring a domain is as follows:

1. User selects a desired domain: Decide on a domain name based on your preferred words or brand name.

2. Application through a registrar: Check if the chosen domain name is available; if it is, enter the required information and apply.

3. Registration at the registry: The registrar forwards the application information to the registry, and the registry registers the mapping between that domain name and the IP address in its database.

4. Establishment of ownership: Once registration is complete, ownership (more accurately, the right to use) of that domain is granted to you.

This series of processes is typically handled automatically in a few minutes to a few hours. The time it takes until you can actually start using it (propagation time) varies depending on the timing of DNS updates, but in most cases, it is within 24 to 48 hours.

Relationship between DNS and Domains

Basic Mechanism of DNS

DNS (Domain Name System) is a system for converting domain names into IP addresses. It functions as a critical infrastructure of the internet, making it easy for users to access services such as websites and email.

Domain Name Resolution Process

The process called "name resolution," which occurs from the time you enter a domain name until the website is displayed, follows a flow like this:

1. The user enters a domain name (e.g., example.com) into the browser.
2. The computer first checks its own DNS cache.
3. If not in the cache, it queries the ISP's DNS server (resolver).
4. The ISP's DNS server checks its own cache.
5. If not in the cache, it queries the root DNS server.
6. The root DNS server returns information for the TLD's DNS server.
7. The TLD's DNS server returns information for the authoritative DNS server.
8. It obtains the domain's IP address from the authoritative DNS server.
9. The IP address is returned to the client, which connects to the website.

This process typically completes in a few hundred milliseconds. Additionally, since information for frequently accessed sites is saved in the cache, subsequent access becomes even faster.

Role of Name Servers (DNS Servers)

A name server (DNS server) is a server that manages the mapping between domain names and IP addresses. In particular, the "authoritative DNS server" that manages the information for the domain you acquired is the server that ultimately responds to queries regarding that domain.

When you register a domain, the registrar typically provides name servers for that domain. Alternatively, it is also possible to specify your own custom name servers.

How to Connect a Domain to a Website

Just acquiring a domain is not enough to display a website. To connect a domain to a website, the following tasks are required:

1. DNS Record Settings: Configure which server the domain points to. Mainly, you set the following records:

   • A Record: Maps a domain to an IP address.
   • CNAME Record: Maps one domain to another domain.
   • MX Record: Specifies mail servers.
   • TXT Record: Text information used for things like domain authentication.

2. Web Server Settings: Prepare the server where the actual website files will be placed and configure that server to accept the domain.

Once these settings are complete, you will be able to access the website using the domain name.

Steps from Domain Acquisition to Starting Use

Points for Choosing a Domain

The main points when choosing a domain include:

• Short and easy to remember: If it's too long, it will be hard to remember and may cause typing errors.
• Matches the brand or business content: It's good if it relates to your company's brand or the services you provide.
• Choice of TLD: Select one that fits your purpose or target, such as .com, .jp, or .net.
• Consider future scalability: Think about business expansion or changes in direction, and consider a name that isn't too restrictive.

Specific Flow of Registration Procedures

1. Choose a registrar: Compare prices, service details, support systems, etc., and make a choice.
2. Check domain name availability: Verify if the desired domain name is already in use.
3. Enter registration information: Provide owner information (Whois information).
4. Pay the fees: Make the payment using a credit card or other methods.
5. Registration complete: You will receive a registration completion email.

DNS Record Settings

To link the acquired domain to an actual website or email server, you need to configure DNS records. The main record types are:

• A Record: Maps a domain to an IP address (e.g., example.com -> 93.184.216.34).
• CNAME Record: Maps one domain to another domain (e.g., www.example.com -> example.com).
• MX Record: Specifies mail servers.
• TXT Record: Used for email authentication such as SPF, DKIM, DMARC, or domain ownership verification.

These can be configured from the management screen provided by the registrar.

Website and Email Settings

To actually use the domain, you also need to configure the web server and email server:

1. Web Server Settings: Set up the domain on your rental server or cloud service.
2. Acquiring an SSL Certificate: Setting up an SSL certificate is also important for secure communication.
3. Email Server Settings: If you use email with a custom domain, you also need to configure the email server.

Key Points for Domain Management

Importance of Renewal Procedures

Domains are basically rented (usage rights) and cannot be owned permanently. Usually, renewal is required on an annual basis.

If you forget to renew:

• There is a grace period for a certain amount of time, but eventually, the domain will expire.
• Expired domains become available for anyone to acquire, which carries a risk of misuse.
• It can be difficult to recover a domain once it is lost.

Many registrars offer automatic renewal settings, so we recommend setting up automatic renewal for important domains.

Management of Domain Information

It is important to properly manage the registration information (Whois information) for your domain:

• Keeping Contact Information Up to Date: Always keep your email address and phone number current.
• Privacy Protection Services: If you do not want to disclose personal information, you can use privacy protection services provided by many registrars.
• Management Account Security: Strengthen the security of your registrar account by setting up two-factor authentication, etc.

About Domain Transfers

If you want to change your registrar, a procedure called a domain transfer is required:

1. Obtain an authentication code (AuthCode) from the current registrar
2. Apply for a transfer with the new registrar and enter the authentication code
3. Approval from the current registrar (often requires confirmation via email)
4. Transfer completed (usually takes several days)

When transferring, a one-year renewal fee is often required. There are also restrictions, such as not being able to transfer a domain within 60 days of registration, so caution is necessary.

Security Measures

A domain is the face of your company or service and a vital asset. Consider the following security measures:

• Registrar Lock: Enable the lock feature to prevent unauthorized transfers.
• DNSSEC: Implement a mechanism to cryptographically verify DNS responses.
• Regular Monitoring: Periodically check the status and settings of your domain.

Summary

Domains are more than just website addresses; they are part of the critical infrastructure of the internet. By understanding the mechanisms of their acquisition and management, you can develop more effective web strategies.

• Domain is an address on the internet: A system that allows access to IP addresses using human-friendly names.
• Hierarchical structure: The domain name space is managed in a tree structure.
• Division of registration and management: Registry, Registrar, and ICANN each play their respective roles.
• Name resolution by DNS: The conversion from domain names to IP addresses is achieved by DNS.
• Regular management is important: Continuous care such as renewal, information management, and security is necessary.

Having your own domain is the first step toward establishing a unique identity on the internet. Through this article, I hope you have deepened your understanding of how domains work and that it will be useful for your domain acquisition and management.

Finally, a domain is not just a technical element, but also an important element for branding and marketing. By choosing the best domain that suits your business or project and managing it appropriately, let's create long-term value.