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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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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 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 . . .
slide5

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?
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
ad