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Domain & DNS Management

Domain Names, DNS Architecture, and Canadian .CA Registrations

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Network nodes linked across a map of Canada

Summary: A domain is a name you rent from a registry through a registrar; DNS is the system that turns that name into server addresses. Choose a registrar with transparent renewal pricing, free WHOIS privacy and two-factor authentication, and use a fast Anycast DNS provider for your nameservers. For .CA names, you must meet CIRA's Canadian presence requirements.

How a DNS lookup resolves

Resolving www.example.ca

  1. 01

    Browser / OS cache

    Checks for a cached answer

  2. 02

    Recursive resolver

    Your ISP or 1.1.1.1 / 8.8.8.8

  3. 03

    Root servers

    Refer to the .ca servers

  4. 04

    .CA TLD servers

    Refer to example.ca's nameservers

  5. 05

    Authoritative nameserver

    Returns the A/AAAA record

Each answer carries a TTL (time to live) that tells resolvers how long to cache it. 'Propagation' is simply old cached answers expiring around the world.

Who's who in the domain system

RoleWhat it doesExample
RegistryOperates a top-level domainCIRA for .ca
RegistrarSells and manages registrations for youAny CIRA-certified registrar
RegistrantThe legal holder of the domainYou or your business
DNS hostRuns your authoritative nameserversYour registrar, host or a dedicated DNS provider

The domain lifecycle

  1. Registration for 1–10 years.
  2. Renewal before expiry; enable auto-renew and keep payment details current.
  3. Expiry and grace period, during which you can usually still renew (often at higher cost).
  4. Redemption period, where restoration is possible but expensive.
  5. Deletion and release back to the public.

What is Anycast DNS?

Anycast announces the same IP address from many locations, so each resolver reaches the nearest nameserver. That reduces lookup time and absorbs denial-of-service attacks. Most major DNS providers use it; check that they have points of presence in Canada.

Choosing a registrar

  • Clear renewal prices, not just first-year discounts
  • Free WHOIS privacy where the registry allows it
  • Two-factor authentication and registrar lock
  • Easy access to EPP/auth codes for transfers
  • Ability to use your own nameservers
  • DNSSEC support

Learn each record type in understanding DNS records, move a .ca name with our .CA transfer guide, and pick hosting in the Canadian web hosting guide.

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