ECEN4533 Data Communications
Lecture #9          28 January 2008
Dr. George Scheets

ECEN4533 Data Communications
Lecture #10          30 January 2008
Dr. George Scheets

Design Problem – RedNeckNet ISP

SONET Hierarchy

T Carrier & SONET

Leased Line Networks

ISO OSI Seven Layer Model
Leased Line (Circuit Switched, TDM)
 Organized around Frames:1/8000th second entity

Leased Line Packet Format

Leased Line Backbone

Carrier Leased Line Network

Circuit Switched connections waste bandwidth for bursty traffic.

Carrier Leased Line Network

IEEE 802.3 Ethernet

ISO OSI Seven Layer Model
Ethernet (Packet Switched, StatMux)

802.3 Ethernet Packet Format

Duplex: We're not talking apartments

802.3 Flow Chart (NIC)

802.3 Back-Off Algorithm

10Base5 & 10Base2 (Obsolete)

10BaseT & Shared Hub

10BaseT & Shared Hub

10BaseT & Shared Hub

10BaseT & Switched Hub

10BaseT & Switched Hub

10BaseT & Switched Hub

10BaseT & Switched Hub

Full Duplex System

Campus Network 1993

Ethernet Switched Hubs

Ethernet Switched Hubs

Ethernet Flavors

Shared Ethernet

Switched Ethernet

Ethernet & Switched Hub

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