TOC: Introduction - PowerPoint PPT Presentation

Loading...

PPT – TOC: Introduction PowerPoint presentation | free to view - id: d5121-ZDc1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

TOC: Introduction

Description:

Introduction: Network Components ... Introduction: Internetwork ... Introduction: Types of Network. Classification 1: Size, Information, Application ... – PowerPoint PPT presentation

Number of Views:191
Avg rating:3.0/5.0
Slides: 33
Provided by: kfa4
Category:
Tags: toc | introduction

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: TOC: Introduction


1
TOC Introduction
  • Network Examples
  • Network Components
  • Ethernet
  • Interconnected LANs
  • Internetwork
  • Types of Networks
  • Internet
  • Packets
  • Transport

2
Introduction Network Examples
  • UCB
  • Backbone
  • Teleglobe
  • Global Crossing
  • Williams
  • Regional Palo Alto
  • Types of Networks
  • Internet
  • Packets
  • Transport

3
Network Examples UCB
BACKBONE
SODA
2nd Floor Cory
1st Floor Cory
REGIONAL
EVANS
LOCAL
CAMPUS
4
Network Examples Backbone
Teleglobe Communications Corporation Fiber
Satellite
5
Network Examples Backbone
Global Crossing Corporation
6
Network Examples Backbone
Williams Communications
7
Network Examples Regional
Palo Alto Network
8
Introduction Network Components
  • Links carry bits from one place to another (or
    maybe to many other places)
  • Interface attaches device to link
  • Switch/router interconnect links
  • Host communication endpoint (workstation, PDA,
    cell phone, toaster, tank) connected to links

9
Network Components Links
Fibers
Cat5 Unshielded Twisted Pairs
Coaxial Cable
Wireless
10
Network Components NIC
Ethernet Network Interface Card
11
Network Components
Telephone Switch
Large Router
12
Introduction Ethernet
  • Ethernet is a Local Area Network (LAN)
  • Architecture Switch and/or Hub
  • System View Services

13
Ethernet Architecture
Switch and/or Hub
14
Ethernet System View
  • Ethernet is a broadcast-capable, multi-access LAN
  • Provides a Link service between nodes
  • Abstract view

15
Introduction Interconnected LANs
LANs interconnected by routers
LAN2
LAN1
R1
R2
Internet
LAN3
R4
R3
16
Introduction Internetwork
  • Provides message delivery between multiple
    networks that may belong to different
    organizations

ISP 2
ISP 1
Subnet 2
Subnet 1
Example Subnet 1 network of LANs of
previous slide ISP 1 Sprint, ISP 2
MCI Subnet 2 UCB network
17
Introduction Types of Network
  • Classification 1 Size, Information, Application
  • Classification 2 Use, Protocols, Technologies
  • Switching
  • Broadcast vs. Switched
  • Characteristics
  • How to switch
  • Taxonomy

18
Types of Network Classification 1
  • Geographical distance
  • Local Area Networks (LAN) Ethernet, Token ring,
    FDDI
  • Metropolitan Area Networks (MAN) DQDB, SMDS
  • Wide Area Networks (WAN) X.25, ATM, frame relay
  • Caveat LAN, MAN, WAN may mean different things
    Service, network technology, networks
  • Information type
  • Data networks vs. telecommunication networks
  • Application type
  • Special purpose networks airline reservation
    network, banking network, credit card network,
    telephony, CATV
  • General purpose network Internet

19
Types of Network Classification 2
  • Right to use
  • Private enterprise networks
  • Public telephony network, Internet
  • Protocols
  • Proprietary SNA, AppleTalk
  • Open IP
  • Technologies
  • Terrestrial vs. satellite
  • Wired vs. wireless

20
Types of Network Broadcast vs. Switched
  • Broadcast Network
  • Switched Network

21
Types of Network Characteristics
  • Broadcast
  • One to all
  • Examples some LANs (Hub-Ethernet, 802.11)
  • Problem coordinate the access of all nodes to
    the shared communication medium (Multiple Access
    Problem)
  • Switched
  • One to subset
  • Examples WANs (Telephony Network, Internet)
  • Problem how to forward information to intended
    node(s)
  • This is done by special nodes (e.g., routers,
    switches) running routing protocols

22
Types of Network How to Switch?
  • Circuit-Switched
  • Set up circuit between two devices
  • Exchange information
  • Release circuit
  • Packet-Switched
  • Send packets with source and destination
    addresses
  • Vircuit-Circuit Switched
  • Select path from source to destination (Virtual
    Circuit)
  • Assign a label to that path
  • Send packets with that label
  • Release Virtual Circuit Note Some VCs are
    permanent.

23
Types of Network Taxonomy
  • Based on the way in which the nodes exchange
    information

Hub-Ethernet CATV
Telephone
MPLS ATM Frame Relay
Sw.-Ethernet Internet
24
Introduction The Internet
  • Overview
  • Scale

25
Internet Overview
  • A global network of networks all using a common
    protocol (IP, the Internet Protocol)
  • Focus of this class
  • A challenge to understand
  • large scale (10s of millions of users, 10s of
    thousands of networks)
  • heterogeneity, irregular topology, decentralized
    management

26
Internet Scale
  • Data from www.nw.com

27
Introduction Packets
  • Illustration
  • Main Ideas

28
Packets Illustration
A B ...
29
Packets Main Ideas
  • The switches have no memory of packets
    scalability
  • The network is independent of the applications
    flexibility
  • The packet formats and addresses are independent
    of the technology extensibility

30
Introduction Transport
  • Acknowledgments
  • Link Sharing

31
Transport Acknowledgments
  • The destination sends back an acknowledgment for
    every correct packet it gets.
  • The source uses these ACKs to
  • Retransmit unacknowledged packets
  • Adjust the rate of its transmissions.

32
Transport Link Sharing
The sources base their transmissions on when they
get acknowledgments. The scheme regulates the
sharing of common links
About PowerShow.com