Chapter 2 The Internet Underlying Architecture. How the DNS works? DNS: Domain Name System Visiting a website: - Write the address - IP will use the address.

Slides:

Advertisements

Similar presentations

Routing Routing in an internetwork is the process of directing the transmission of data across two connected networks. Bridges seem to do this function.

Advertisements

Chapter 3 Internet. Physical Components of the Internet Servers Networks Routers.

© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 Version 4.0 Network Services Networking for Home and Small Businesses – Chapter 6.

COS 125 DAY 2. Agenda Questions from last Class?? Review ISOC presentation on Internet History Today’s topics Circuit versus Packet switching TCP/IP Software.

Layer 7- Application Layer

Chapter Extension 7 How the Internet Works © 2008 Prentice Hall, Experiencing MIS, David Kroenke.

COS 125 DAY 2. Agenda Questions from last Class?? Review ISOC presentation on Internet History Today’s topic TCP/IP Software Structure of The Internet.

BA 471 – Telecommunications and Networking Dr. V.T. Raja Oregon State University

BA Telecommunications and Networking Dr. V.T. Raja Oregon State University

Vocabulary URL = uniform resource locator: web address protocol –set of rules that networked computers follow in order to share data and coordinate communications.

Chapter 15 Networks.

Web and Internet Part I ST: Introduction to Web Interface Design Prof. Angela Guercio Spring 2007.

1 Networking A computer network is a collection of computing devices that are connected in various ways in order to communicate and share resources. The.

15-1 Networking Computer network A collection of computing devices that are connected in various ways in order to communicate and share resources Usually,

Understanding Networks Charles Zangla. Network Models Before I can explain how connections are made from across the country, I would like to provide you.

The internet and the WWW

15-1 More Chapter 15 Goals Compare and contrast various technologies for home Internet connections Explain packet switching Describe the basic roles of.

Chapter 15 Networks. Chapter Goals Types of networks Topologies Open Systems Home Internet connections 15-2.

Mr C Johnston ICT Teacher

Chapter 3 The Basics of Networking

Hands-On Microsoft Windows Server 2003 Networking Chapter Three TCP/IP Architecture.

Networking Computer network A collection of computing devices that are connected in various ways in order to communicate and share resources Usually,

70-291: MCSE Guide to Managing a Microsoft Windows Server 2003 Network Chapter 3: TCP/IP Architecture.

How the Internet Works: What happens when information is sent from your computer?

INTERNET DATA FLOW Created by David Whitchurch for ISDS 4120 Louisiana State University.

A+ Guide to Managing and Maintaining Your PC Fifth Edition Chapter 19 PCs on the Internet.

1 Client Server Architecture over the Internet Week - 2.

Network Management System The Concept –From a central computer, network administrator can manage entire network Collect data Give commands –Moving gradually.

Chapter 1: Introduction to Web Applications. This chapter gives an overview of the Internet, and where the World Wide Web fits in. It then outlines the.

ITIS 1210 Introduction to Web-Based Information Systems Chapter 23 How Web Host Servers Work.

© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 Version 4.0 Network Services Networking for Home and Small Businesses – Chapter 6.

Routers. What is a Router? A multi-port connectivity device Can connect different types of LANs as well as WANS Works at Layer 3 – Network Layer using.

15-1 Networking Computer network A collection of computing devices that are connected in various ways in order to communicate and share resources.

The Internet The internet is simply a worldwide computer network that uses standardised communication protocols to transmit and exchange data.

Information Flow Across the Internet. What is the Internet? A large group of computers that link together to form the Worldwide Area Network (WAN)

Chapter 1 What is the Internet?. The Wired World of the Internet Who runs the Internet? Collection of thousands of networks RFCs, users’ agreement about.

Lecture 3 TCP/IP & the Internet Boriana Koleva Room: C54

Introduction to Internet. Chapter 1 Objectives Origins of the Internet Packets and Routers TCP/IP DNS HTTP URL Client-Server.

Presented by Rebecca Meinhold But How Does the Internet Work?

Networks: LANs, WANs and Communication Protocols How do computers communicate?

Mr C Johnston ICT Teacher

IP addresses IPv4 and IPv6. IP addresses (IP=Internet Protocol) Each computer connected to the Internet must have a unique IP address.

Networks. Ethernet  Invented by Dr. Robert Metcalfe in 1970 at Xerox Palo Alto Research Center  Allows group of computers to communicate in a Local.

Networks Part 2: Infrastructure + Protocols NYU-Poly: HSWP Instructor: Mandy Galante.

Transmission Control Protocol (TCP) Internet Protocol (IP)

Cisco Confidential © 2013 Cisco and/or its affiliates. All rights reserved. 1 Cisco Networking Training (CCENT/CCT/CCNA R&S) Rick Rowe Ron Giannetti.

ITIS 1210 Introduction to Web-Based Information Systems Chapter 5. How Internet Addresses and Domains Work.

Communication Networks NETW 501 Tutorial 2

1 UNIT 13 The World Wide Web. Introduction 2 Agenda The World Wide Web Search Engines Video Streaming 3.

1 UNIT 13 The World Wide Web. Introduction 2 The World Wide Web: ▫ Commonly referred to as WWW or the Web. ▫ Is a service on the Internet. It consists.

Introduction to the Internet

3.1 Types of Servers.

How is all that data traffic controlled on the Internet?

Some bits on how it works

Network Architecture Introductory material

Web Development & Design Chapter 1, Sections 4, 5 & 6

CS222 Web Programming Course Outline

Packet Switching To improve the efficiency of transferring information over a shared communication line, messages are divided into fixed-sized, numbered.

Review of Important Networking Concepts

Modelling the internet

Web Design & Development

Review of TCP/IP Internetworking

Modelling the internet

Lecture 4 Communication Network Protocols

Protocols 2 Key Revision Points.

Data Communication Networks

How Our Customers Communicate With Us

Read this to find out how the internet works!

Computer Networks Protocols

Presentation transcript:

Chapter 2 The Internet Underlying Architecture

How the DNS works? DNS: Domain Name System Visiting a website: - Write the address - IP will use the address and DNS to deliver mail from PC to PC Domain types:.com -.gov -.net -.mil -.org -.uk

How the DNS works? Ex. NASA’s SPACElink Address Spacelink.msfc.nasa.gov The top domain (government) The Nasa domain Marshal Space Flight Center (a network in Nasa) The Nasa computer that runs the Spacelink Program

How the DNS works? Name Servers: - Keep in track of changes - Work with DNS to ensure that is delivered to the right person - Make sure that you are sending to the proper location - Routing all messages properly Name Servers contain tables that match alphanumeric Internet Addresses to numeric IP Addresses

How Routers work? The traffic cops of the Internet Routing steps: - Open the IP packets to read the destination address - calculate the best route - Send the packet toward its final destination or to another router and so on. Hops: Routers or Gateways on any given path

How Routers work? Router Physical Ports: 1. Input: receiving 2. Output: Sending Routing Operation: - Routing Process software runs (receiving) - Routing Table (Addresses Database) - Sending the packet to the output port - Send data to a router or to the destination

How Routers work? Input Queue: A special holding area on the Router RAM A Router can have more than one queue Packets may be lost if the received packets’ number exceed the queue’s capacity TCP will re-sent the packet again if this happened

Client/ Server Architecture Client: a Local PC, request some services from a server Server “Host”: More powerful central computer Client/ Server Model Client/ Server Model Client Request (website) Server The answer

Client/ Server Architecture Network Computer’s kinds: Windows, Macintosh, Unix Connections to the server: LAN – WAN – Phone Line Reason for set up this model: Information travel: HTTP Hyper Text Transfer Protocol