Fast gigabit ethernet
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FAST & GIGABIT ETHERNET PowerPoint PPT Presentation


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FAST & GIGABIT ETHERNET. Fast Ethernet: Goals. Upgrade the data rate up to 100 Mbps Make it compatible with Standard Ethernet Keep the same 48-bit address Keep the same frame format Keep the same minimum and maximum frame lengths. New features. Auto-negotiation:

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FAST & GIGABIT ETHERNET

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Fast gigabit ethernet

FAST&GIGABIT ETHERNET

Network Security


Fast ethernet goals

Fast Ethernet: Goals

  • Upgrade the data rate up to 100 Mbps

  • Make it compatible with Standard Ethernet

  • Keep the same 48-bit address

  • Keep the same frame format

  • Keep the same minimum and maximum frame lengths

Network Security


New features

New features

  • Auto-negotiation:

    • It allows a station or a hub a range of capabilities.

    • Allows two devices to negotiate the mode or data rate of operation

    • Allows incompatible devices to connect to one another

Network Security


Topology used

Topology used

  • Fast Ethernet is designed to connect two or more stations together either in a point-to-point or star topology (with a hub or switch in center)

Network Security


Implementations

Implementations

  • It can be categorized as either two-wire or four-wire

  • Two-wire: cat 5 UTP (100Base-TX) or fiber-optic cable (100Base-FX)

  • Four-wire: cat 3 UTP (100Base-T4)

Network Security


Gigabit ethernet goals

Gigabit Ethernet: Goals

  • Upgrades the data rate to 1 Gbps

  • Make it compatible with Standard or Fast Ethernet

  • Use the same 48-bit address

  • Keep the same frame format

  • Keep the same minimum and maximum frame lengths

  • To support auto-negotiation

Network Security


Modes

Modes

  • Implements half-duplex and full-duplex

  • Full-duplex:

    • A central switch connected to all computers

    • Each switch has buffers for each input port

    • No collision i.e. CSMA/CD is not used

    • Maximum length of cable is determined by signal attenuation and not by collision detection process

Network Security


Modes continued

Modes (continued)

  • Half-duplex:

    • Rarely used, uses a hub instead of switch

    • Uses CSMA/CD

    • Frame Bursting Method is defined to determine maximum length of network

      • Multiple frames are sent.

      • Padding is added in between these frames to look like one frame, so that the channel is not idle.

Network Security


Topology used1

Topology used

  • Point-to-point

  • Star

  • Two star

  • Hierarchy of stars

Network Security


Implementations1

Implementations

  • Two-wire:

    • Fiber-optic cable (1000Base-SX, short-wave or 1000Base-LX, long-wave) or STP (1000Base-CX)

  • Four-wire:

    • 5 twisted-pair cable (100Base-T)

Network Security


Things to do

Things to do

  • Encoding schemes of Fast & Gigabit Ethernet

  • Switched Vs Fast Vs Gigabit Ethernet

  • What is Ten-Gigabit Ethernet?

  • Wireless Ethernet & its frame format

  • Learn Broadband & Bluetooth architectures

Network Security


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