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About this document
- Pages
- 15 pages
- Price
- $15 one-time, yours to keep
- Membership
- Included in every plan
- Format
- Subject
- Computer Science, Information Technology
- Module
- CS 571
This document explains the Domain Name System (DNS), its structure, and how it works. It covers the delegation of subdomains and the components of DNS. It is useful for understanding DNS specifications and operations, especially for the CS 571 course.
What's inside
- DNS specifications and concepts
- Domain Name System structure
- Domain Name Space
- Delegation of naming authority
- Resource Records (RRs)
- DNS zone examples
Who it is for: Students of the CS 571 course. (Postgraduate)
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Summary
The Domain Name System (DNS) is a huge distributed database. It maps human-readable names to other information, especially addresses. Students learn about DNS structure and delegation.
DNS Specifications
The DNS system and its components are introduced. The Domain Name Space and zones are explained. Details of protocols and algorithms are given.
Domain Name Space
The Domain Name Space is a tree-structured namespace with a single root. Fully-Qualified Domain Names are nodes in the tree. Top-level domains include generic and country codes.
Delegation of Naming Authority
Each node in the namespace tree has one authority. A subtree for which authority has been delegated is called a zone. The authority for a zone is responsible for maintaining the database information that describes the zone.
Resource Records
Resource Records define a binding between a Fully-Qualified Domain Name and some other information. Each Resource Record has a type according to the kind of information in the binding.
Key terms
- Domain Name Space
- A tree-structured namespace with a single root.
- Fully-Qualified Domain Name
- A node in the tree of the Domain Name Space.
- Resource Records
- Define a binding between a Fully-Qualified Domain Name and some other information.
- Zone
- A subtree for which authority has been delegated.
- Delegation of Naming Authority
- The process of giving control over subtrees.
- Top-level Domains
- The first part of a domain name, such as com or edu.
Questions this document helps with
- What is the Domain Name Space?
- How does delegation of naming authority work?
- What are Resource Records in DNS?
Summary written with AI from the document's text.
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