Networking Hardware - Network Communication - Lecture Slides, Slides for Data Communication Systems and Computer Networks
jamil
jamil29 January 2014

Networking Hardware - Network Communication - Lecture Slides, Slides for Data Communication Systems and Computer Networks

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Course name is Network Communication. This lecture includes: Networking Hardware, Network Hardware Categories, Local Networking Hardware, Internetworking Hardware, Manageable Devices, Nic Basics, Token Ring Cards, Cable ...
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LAN BASICS

Network Hardware

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Chapter Objectives

• Describe the important basic network hardware and the internetworking hardware

• Discuss the desired characteristics of a server and a workstation

• Present different switching technologies

• Examine the routing process with the help of an example

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Introduction Module 1

(4-06)

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Network Hardware Categories

• Local networking hardware

• Internetworking hardware

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Local Networking Hardware

• Network Interface Cards (NICs)

• Cables

• Connectors

• Line drivers or repeaters

• Hubs / Switches

• Servers

• Workstations

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Internetworking Hardware

• Line drivers or repeaters

• Transceivers

• Bridges

• Switches

• Routers

• Gateways

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Current Day Internetworking Devices

• Mostly confined to the following: • Switches

• Routers

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Folding of Devices into Switches

• Show Diagram

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Folding of Devices into routers

• Show Diagram

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Manageable Devices

• Switches and routers in a large network can be managed from a remote console

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End of Module

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MODULE

Network Interface Cards (NICs)

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NIC Basics

• Technology used

• Connectors used

• Speed of the network

• Interface technologies

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An Actual NIC Description

• 100BaseTX, PCI card • 100 = speed in Mbps

• Base =Ethernet

• TX = Twisted pair

• 32-bit = bus width; it may also be 64-bit wide

• PCI = bus technology

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10BaseT NIC

• 10BaseT cards • Physical star and logical bus networks

• 10 Mbps speed

• Ethernet standard

• Twisted pair wiring

• RJ-45 Connectors

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10Base2 NIC

• 10base2 cards • Physical bus and logical bus networks

• 10 Mbps speed

• Ethernet standard

• Thin coaxial wiring

• BNC connectors

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10Base5 NICs

• 10Base5 • Physical bus and logical star networks

• 10 Mbps speed

• Ethernet standard

• Thick coaxial wiring

• AUI connectors are used

• Note: 10BaseT, 10Base2 and 10Base5 are not used widely in practice anymore

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100BaseTX NIC

• 100BaseTX • 100 Mbps speed

• Fast Ethernet standard

• Twisted pair • Higher quality Category 5 wires are normally required to implement 100 mbps Ethernet

networks

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1000BaseT NICs

•1000BaseT • 1000 Mbps • Ethernet • Twisted-pair wire • Category 5e

•1000BaseF • 1000 Mbps • Ethernet • Optical fiber wire

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1000BaseT NIC Source: 3Com

Note the RJ-45 connection and the status lights on the card

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Gigabit Ethernet Fiber NIC Source: 3Com

•Note the two connectors for the RX and TX connections •For use with PCI and PCI-X servers

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Gigabit Ethernet NIC Properties (Source: 3Com)

• Tenfold throughput boost: accelerate Fast Ethernet server connections to 1000 Mbps

• Fiber-optic cabling supports data security and faster throughput

• Automatic link aggregation and fail-over allow multiple NIC connections to be installed

• Advanced server features maximize availability, scalability, and fault tolerance

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Gigabit Ethernet NIC Properties (Source: 3Com)

• 64-bit PCI and PCI-X support: faster transmissions with lower CPU utilization

• Centralized, standards-compliant management lowers network administration time and total cost of ownership

• TCP/UDP/IP checksum offloads reduce host CPU load for improved system performance

• PCI Hot-Plug lets you remove/replace server NICs without taking the server offline

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Token Ring Cards

• Token ring network cards

• Earlier token ring cards • 4/1 Mbps

• Later token ring cards • 16/4 Mbps

• Newer token ring cards • Fast token ring networks

• 100/16/4 Mbps

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PCI Bus Types for NICs

•Width • Bus width is 32-bit or 64-bit

•Bus frequency • 33 MHz • 66 MHz • 100 MHz etc.

•Technology • PCI • PCI-X • PCI Express

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