Information networks
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INFORMATION NETWORKS. TIER 9. Let’s Re-Cap…. General Concepts. What is Computer? Data & Information 3 components of a Computer System 4 elements of a Computer System Features of a Computer System Disadvantages of Computers Units of Storage. COMPUTER SYSTEM. - -. - - -.

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INFORMATION NETWORKS

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Information networks

INFORMATION NETWORKS

TIER 9


General concepts

Let’s Re-Cap…

General Concepts

  • What is Computer?

  • Data & Information

  • 3 components of a Computer System

  • 4 elements of a Computer System

  • Features of a Computer System

  • Disadvantages of Computers

  • Units of Storage


Computer system

COMPUTER SYSTEM

-

-

-

-

-


Computer networks

Let’s Re-Cap…

COMPUTER NETWORKS

  • What is Computer Networks?

  • LAN & WAN

  • Network Topologies

  • Modem & Signals

  • Networking Equipments

    • NIC, Hub, Switch, Bridge, Router

    • Cables . . .


Information networks

Connect

Terminals / Nodes

ConnectNetworks

HUB

BRIDGE

Connects & transmits only

+ Intelligence

SWITCH

ROUTER

Sends packet direct to terminal (via address)

Detects traffic & failures


Communication protocols

COMMUNICATION PROTOCOLS

  • Why do we need protocols for communication?


Communication protocols1

COMMUNICATION PROTOCOLS


Group practice

…GROUP PRACTICE…

  • Connect 2 PC using LAN

  • Identify components needed

  • Draw diagram of the network

  • Label the components


Telephone networks in computing

TELEPHONE NETWORKS IN COMPUTING

  • What does telephones have to do with the Internet?


Telephone networks in computing1

TELEPHONE NETWORKS IN COMPUTING

  • What does telephones have to do with the Internet?


Telephone networks in computing2

TELEPHONE NETWORKS IN COMPUTING

  • What does telephones have to do with the Internet?


Telephone networks in computing3

TELEPHONE NETWORKS IN COMPUTING

  • What does telephones have to do with the Internet?


Network management

NETWORK MANAGEMENT

Why do we NEED network managers ???

  • Collect & analyze traffic info

  • Find solutions

  • Checks & monitors bandwidth, circuits & hardware

  • Identify error

  • Analyze error

  • Separate error from network

  • Correct error

  • Protection of network

  • Create & maintain passwords & access control

  • Monitor & control access

  • Create & maintain security policy

  • Collect & maintain info of network

  • e.g. network system, its status, supplier, component connection


Applications

APPLICATIONS

  • The Internet

    • Existence = why ?

    • Physical: Computers, networks & services

    • Allows access to large resource of data & information  hosts / servers

    • Protocol = what ?

    • Any computer can act as a host


Applications1

APPLICATIONS

  • WWW

    • WWW ≠ the Internet !

    • Difference ???

    • “Universal readership” = concept of WWW creation

      • Tools:

        • Browsers

        • Servers / gateways

        • Addressing schemes

        • Common protocols

        • Format negotiation

    • Server vs. ISP


Summary

SUMMARY 

  • COMMUNICATION PROTOCOLS

  • TELEPHONE NETWORKS

  • NETWORK MANAGEMENT

  • APPLICATIONS


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