{
  "id": "02",
  "content": [
    {
      "type": "heading",
      "text": "Registrars, Registries, Nameservers and Zones"
    },
    {
      "type": "text",
      "html": "A registry operates a TLD, a registrar sells domain registrations, nameservers answer DNS queries, and a DNS zone contains the records for a domain."
    },
    {
      "type": "text",
      "html": "Moving a domain to new nameservers changes where DNS is managed. It does not automatically move the website files, email inboxes, or application data."
    },
    {
      "type": "callout",
      "style": "info",
      "html": "<strong>Practice:</strong> Before changing nameservers, copy every existing DNS record. Missing MX, TXT, or verification records can break email and connected services."
    }
  ],
  "quiz": {
    "questions": [
      {
        "id": "q1",
        "type": "single",
        "text": "What does a DNS zone contain?",
        "options": [
          {
            "id": "a",
            "text": "The DNS records for a domain"
          },
          {
            "id": "b",
            "text": "Only the homepage text"
          },
          {
            "id": "c",
            "text": "Only social media posts"
          }
        ],
        "correct": [
          "a"
        ]
      },
      {
        "id": "q2",
        "type": "single",
        "text": "What can nameserver changes affect?",
        "options": [
          {
            "id": "a",
            "text": "Where DNS is managed"
          },
          {
            "id": "b",
            "text": "The visitor's keyboard layout"
          },
          {
            "id": "c",
            "text": "The domain's spelling"
          }
        ],
        "correct": [
          "a"
        ]
      }
    ]
  }
}