Domain name

What is a domain name?

A domain name is a human-readable address used to identify and access resources on the internet. It serves as a memorable alternative to numerical IP addresses, allowing users to type "example.com" instead of remembering "93.184.216.34". Domain names are fundamental to how people navigate and identify locations on the web.

Domain name structure

Components

A fully qualified domain name (FQDN) consists of:

subdomain.second-level-domain.top-level-domain
   www    .      example      .      com

• Top-level domain (TLD): The extension (.com, .org, .net)
• Second-level domain (SLD): Your unique identifier (example)
• Subdomain: Optional prefix (www, blog, shop)

Reading right to left

Domain hierarchy reads from right to left:

• .com → top of hierarchy
• example → specific registration under .com
• www → specific host under example.com

How domain names work

DNS resolution

When you enter a domain name:

1. Browser checks local cache

2. Queries recursive DNS resolver

3. Resolver contacts root servers

4. Root directs to TLD servers

5. TLD directs to authoritative nameserver

6. Nameserver returns IP address

7. Browser connects to IP

The domain name system (DNS)

DNS acts as the internet's phone book, translating domain names to IP addresses that computers use to communicate.

Types of domain names

By TLD category

By purpose

• Primary domain: Main business domain
• Parked domain: Registered but undeveloped
• Redirect domain: Forwards to primary
• Subdomain: Section of main domain

Choosing a domain name

Best practices

1. Keep it short: Easier to remember and type

2. Make it memorable: Unique and catchy

3. Avoid hyphens and numbers: Confusing verbally

4. Consider brandability: Can build a brand around it

5. Check pronunciation: Works when spoken aloud

6. Verify availability: Across key TLDs

What to avoid

• Trademarked terms (legal issues)
• Hard-to-spell words
• Regional slang that doesn't translate
• Easily confused with existing brands

Domain name registration

The registration process

1. Check availability using WHOIS/RDAP

2. Select a registrar

3. Provide registrant information

4. Pay registration fee

5. Configure DNS settings

Registration requirements

• Registrant contact information
• Valid payment method
• Agreement to registry policies
• Some TLDs require verification

Registration periods

• Minimum: 1 year
• Maximum: 10 years
• Renewable before expiration

Domain name ownership

Who controls domain names?

• ICANN: Oversees global DNS coordination
• Registries: Manage TLD databases
• Registrars: Sell registrations to public
• Registrants: Domain holders (you)

Rights and responsibilities

As a registrant you:

• Control DNS configuration
• Must maintain accurate WHOIS data
• Pay renewal fees to keep domain
• Follow registry policies

Domain name value

Factors affecting domain value:

• Length (shorter is better)
• Extension (.com premium)
• Keywords (commercial terms)
• Brandability
• Traffic and backlinks
• Age and history

Domain names are essential digital assets that serve as the foundation of online identity and presence.