Understanding Ethernet Networks: Wiring Schemes, Hubs, and Topology, Slides of Computer Networks

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COMPUTER

NETWORKS

Lecture-

Review Lecture 11

 Network Interface Hardware

 Connection Between NIC and Physical Network

 Thick Ethernet ( 10 BASE 5 )

 Thin Ethernet ( 10 BASE 2 )

 10BASE-T

 Comparison Of Wiring Schemes

10Base-T

10Base-T

Hubs

Hubs

Advantages and Disadvantages of

Wiring Schemes

• Cost issues:
  • Twisted pair Ethernet is the cheapest wiring that makes it so popular.
  • Thicknet is the most costly wiring which is no longer used

 Example

• Eight offices wired with a) Thick Ethernet, b)Thin Ethernet, c) Twisted Pair Ethernet

Comparison of Wiring Schemes

The Topology Paradox

 Two different types of topologies:

• Logical Topology: defined by the specific network technology
• Physical Topology: depends on the wiring scheme

Network Interface Cards and

Wiring Schemes

 To allow changing the wiring without changing the interface hardware, NICs support multiple wiring schemes

10/100 Network Interfaces and

Autonegotiation

 10 Base-T version of Twisted pair Ethernet operated at 10 Mbps

 100 Base-T Twisted pair Ethernet operates at 100 Mbps

 100 Base-T technology is backward compatible and allows the participants to negotiate a speed when connection is established

 Process is known as Autonegotiation

10/100 Ethernet NIC

Categories of Wires

Summary

 Wiring Schemes

• 10 Base-T

 Advantages and Disadvantages of Wiring Schemes

 The Topology Paradox

 NICs and Wiring Scheme

 Categories of Wires