Domain Name System (DNS) The Technology Context – B101 Coursework 2 The Technology Context – B101.

Slides:



Advertisements
Similar presentations
2.1 Installing the DNS Server Role Overview of the Domain Name System Role Overview of the DNS Namespace DNS Improvements for Windows Server 2008 Considerations.
Advertisements

Domain Name System. DNS is a client/server protocol which provides Name to IP Address Resolution.
TDC375 Autumn 03/04 John Kristoff - DePaul University 1 Network Protocols Domain Name System (DNS) largely based on slides from D. Comer.
20101 The Application Layer Domain Name System Chapter 7.
Application Layer At long last we can ask the question - how does the user interface with the network?
MCTS Guide to Microsoft Windows Server 2008 Network Infrastructure Configuration Chapter 5 Introduction to DNS in Windows Server 2008.
70-293: MCSE Guide to Planning a Microsoft Windows Server 2003 Network, Enhanced Chapter 7: Planning a DNS Strategy.
TCP/IP Protocol Suite 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 19 Domain Name System (DNS)
DOMAIN NAME SYSTEM. Introduction  There are several applications that follow client server paradigm.  The client/server programs can be divided into.
Intro to Computer Networks DNS (Domain Name System) Bob Bradley The University of Tennessee at Martin.
© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 Version 4.0 Application Layer Functionality and Protocols Network Fundamentals – Chapter.
Chapter 25 Domain Name System
Domain Name Services Oakton Community College CIS 238.
Evolved from ARPANET (Advanced Research Projects Agency of the U.S. Department of Defense) Was the first operational packet-switching network Began.
Domain Name System | DNSSEC. 2  Internet Protocol address uniquely identifies laptops or phones or other devices  The Domain Name System matches IP.
DNS.
NET0183 Networks and Communications Lecture 25 DNS Domain Name System 8/25/20091 NET0183 Networks and Communications by Dr Andy Brooks.
Name Resolution Domain Name System.
Chapter 16 – DNS. DNS Domain Name Service This service allows client machines to resolve computer names (domain names) to IP addresses DNS works at the.
DNS and C# SWE 344 Internet Protocols & Client Server Programming.
Chapter 31 - Naming with the Domain Name System IP addresses vs. symbolic names Structure of Computer names DNS naming structure DNS server hierarchy An.
© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 Version 4.1 ISP Services Working at a Small-to-Medium Business or ISP – Chapter 7.
DNS (Domain Name System) Protocol On the Internet, the DNS associates various sorts of information with domain names. A domain name is a meaningful and.
Sistem Jaringan dan Komunikasi Data #9. DNS The Internet Directory Service  the Domain Name Service (DNS) provides mapping between host name & IP address.
Chapter 29 Domain Name System (DNS) Allows users to reference computer names via symbolic names translates symbolic host names into associated IP addresses.
DNS ITL see: Douglas Comer: Internetworking with TCP/IP, volume I” pages
October 8, 2015 University of Tulsa - Center for Information Security Microsoft Windows 2000 DNS October 8, 2015.
Domain Name System. CONTENTS Definitions. DNS Naming Structure. DNS Components. How DNS Servers work. DNS Organizations. Summary.
Deploying a Web Application Presented By: Muhammad Naveed Date:
BASIC INTERNET PROTOCOLS: http, ftp, telnet. Mirela Walczak.
EE 122: Lecture 20 (Domain Name Server - DNS) Ion Stoica Nov 15, 2001 (* based on the some on-line slides of J. Kurose & K. Rose and of Raj Jain)
TCP/IP Protocol Suite 1 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 19 Domain Name System (DNS)
BZUPAGES.COM. Presented to: Sir. Muizuddin sb Presented by: M.Sheraz Anjum Roll NO Atif Aneaq Roll NO Khurram Shehzad Roll NO Wasif.
Domain Name System (DNS)
Internet Naming Service: DNS* Chapter 5. The Name Space The name space is the structure of the DNS database –An inverted tree with the root node at the.
Domain Name System INTRODUCTION to Eng. Yasser Al-eimad
Wednesday, August 7 th 2013 By the Improvisors.  An Internet Protocol (IP) address is a protocol rule which contains the address of a digital device.
4343 X2 – The Application Layer Tanenbaum Chapter 7.
Basics of the Domain Name System (DNS) By : AMMY- DRISS Mohamed Amine KADDARI Zakaria MAHMOUDI Soufiane Oujda Med I University National College of Applied.
THE LARGEST NAME SERVICE ACTING AS A PHONE BOOK FOR THE INTERNET The Domain Name System click here to next page 1.
DNS Domain Name System By Alexandros Zampas B101 Coursework The Technology Context.
What is the DNS? System converts domain names to IP (Internet Protocol) addresses URL (Uniform Resource Locator) → IP address DNS Problems Limitations.
(Domain Name System) Ismael Ali Technology Context Chi.
The Domain Name System Student : Hi this is my presentation about.
1) The size of the Domain name system. 2) The main components of the Domain Naming System operation. 3) The function of the Domain Naming System. 4)Legislation.
WHAT IS THE DOMAIN NAME SYSTEM (DNS) ?. Overview 1. Introduction to the DNS. 2. How big is the Domain Name System (DNS) ? 3. Components of the DNS. 4.
THE DOMAIN NAME SYSTEM AS AN ADDRESS DIRECTORY FOR THE WORLDWIDE WEB. 1.
Domain Name System The Technology Context Presentation.
DNS Domain Name System. Lots of people use the internet for different reasons. DNS Plays a big role in the internet. The DNS translates domain names into.
DOMAIN NAME SYSTEM By Gazain Naeem. Domain Name System is the hierarchical computer system which is connected to the internet. It works like a telephone.
Domain Name System: DNS To identify an entity, TCP/IP protocols use the IP address, which uniquely identifies the Connection of a host to the Internet.
How the Domain Name System has impacted Internet history. Fig 1: The structure of the DNS name space.
The Domain Name System (DNS) By Alex Kamau B101 Technology Context.
Functions Size Structure Limitations DNS and the Law.
Understand Names Resolution
CS 372 COMPUTER COMMUNICATION AND NETWORKS
NET 536 Network Security Firewalls and VPN
IMPLEMENTING NAME RESOLUTION USING DNS
“Size of DNS” Size of the DNS can be describe from the time before it was created all the computer on a network used to receive a host file named HOST.TXT,
E-commerce | WWW World Wide Web - Concepts
E-commerce | WWW World Wide Web - Concepts
Unit 5: Providing Network Services
Lecture Computer Networks DNS (Domain Name System)
Working at a Small-to-Medium Business or ISP – Chapter 7
Domain Name System Presentation
Net 323 D: Networks Protocols
Chapter 19 Domain Name System (DNS)
Working at a Small-to-Medium Business or ISP – Chapter 7
Working at a Small-to-Medium Business or ISP – Chapter 7
Web Server Technology Unit 10 Website Design and Development.
Presentation transcript:

Domain Name System (DNS) The Technology Context – B101 Coursework 2 The Technology Context – B101

Contents Introduction to DNS Key components of DNS and how it works DNS structure (Tree diagram) Process of DNS UK legislation Limitations Advantages & Disadvantages References

Domain Name System (DNS) What is Domain Name System (DNS)? The terminology, naming conventions, and protocols required to allow users to use host names. When a user refers to a host name, the host, called a DNS resolver, sends a DNS request to a DNS server. The server ultimately returns a response that tells the resolver the IP (Internet Protocol) address that corresponds to that name.

Eg www refers to a service rocket refers to the host name The.co.uk refers to the portion of the domain space where this host is found and then the United Kingdom (uk) is country code DNS can also be said as Protocol with standard how computer exchange the data on the internet and on many private network, Known as TCP/IP protocol suite.

Important components of DNS and how it works DNS Name Servers hold the domain name space and resource records(RRs), and that answer queries from DNS clients. DNS Resolvers (Client) The facility within a DNS client that contacts DNS name servers and issues name queries to obtain resource record information. Domain name space and associated resource records (RRs) A distributed database of name- related information.

DNS structure There is a tree like structure that flourishes within the domain name system. The tree structure begins with the root zone at the very top and then sub-divides further down into zones. A single DNS zone may include only one domain or it may include several domains and sub-domains, depending on the administrator.

Both the root domain and top-level domains are managed internationally. The root domain is the parent to all other domains, and is signified by a period. Top-level domains are arranged under the root organizationally, functionally, and geographically. Root Level is connected to the next layer known as Top level Domain for e.g (.com,.gov,.net,.org ) which is inter-linked by Second Level domain for e.g (Microsoft and Novell)

UK legislation The operation of the Domain Name System is not affected by any legislation in the UK It is an international group of company that are responsible of running Domain Name System server that acts on Domain Name System Issues. They can be influenced by British law, but it plays only a small role.

Limitations IP version 4 – Uses 32-bites in every address. – IP version 4 integrated that permits about 3-4 billion users. IP version 6 – 10 billion IP addresses as it uses 128 bites for every address. – Mathematically this is a limit resource, but practically it’s an unlimited resource.

Advantages and Disadvantages The major advantage of DNS is obvious i.e. users do not have to remember the IP addresses, only the domain names. Second advantage of current system is that it is distributed around the world and under control of different bodies (supervised by ICANN) - this results in system being more secure and more reliable. There are however disadvantages to the Domain Name Server System. IP addresses may change for number of reasons; sometimes actual web host might move to a different data warehouse and has to change the IP address. In this scenario the IP address of the computer is changed but DNS may still have cached the previous IP address and will provide its users with wrong information.

References Bradley Mitchell. (2011). What Is a DNS Server?. Available: Last accessed 23rd nov Blank, A.G. (2002). //TCP/IP JumpStart//. USA: SYBEX. Last accessed 01/12/2011. Wales, J. (2003). //Domain Name System//. Available: Last accessed 02/12/ //Domain Name Services//, 2008, online video, accessed 03 December 2011, Thomas Lee, Joseph Davies. (2011). Domain Name Service (DNS).Available: Last accessed 26th nov Scrimger, R & Lasalle, P & Leitzke, C & Parihar, M & Gupta, M (2002). TCP/IP Bible. Canada: Wiley Publishing, Inc.. p201 Marshall Brain and Stephanie Crawford. ( ). How Domain Name Servers Work. Available: Last accessed 26th nov not specified (cisco). (2011). DNS Best Practices, Network Protections, and Attack Identification. Available: Last accessed 29th nov 2011.