ECEN4533 Data Communications
Lecture #9          30 January 2012
Dr. George Scheets

ECEN4533 Data Communications
Lecture #10          2 February 2012
Dr. George Scheets

Long Haul U.S. Traffic

Leased Lines

Slide 5

Slide 6

IEEE 802.3 Ethernet

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

802.3 Ethernet Frame 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 & 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

Two Types of Addresses

Whose Address goes where?

Whose Address goes where?

Packet to Print? 
Must know destination IP Address

Shared 802.3 Ethernet

Whose address goes where?

Shared 802.3 Ethernet

Switched Ethernet

Switched Ethernet

Whose address goes where?

Whose address goes where?

Whose address goes where?

Frame Relay

Frame Relay Backbone

Frame Relay Backbone

ISO OSI Seven Layer Model
Frame Relay Switch (Layer 1 & 2)

Frame Relay Packet Format
(Assuming Ethernet LAN)

Frame Relay Connectivity

Frame Relay VC Set Up

Frame Relay Backbone

Moving Packets
PC1 > Ethernet (Switched) Hub > Router1 > FR1 > FR2 > Router2 > Ethernet (Switched) Hub > Server

Frame Relay Backbone

Moving Packets
PC1 > Ethernet (Switched) Hub > Router1 > FR1 > FR2 > Router2 > Ethernet (Switched) Hub > Server

Frame Relay Backbone

Moving Packets
PC1 > Ethernet (Switched) Hub > Router1 > FR1 > FR2 > Router2 > Ethernet (Switched) Hub > Server

Frame Relay Backbone

Moving Packets
PC1 > Ethernet (Switched) Hub > Router1 > FR1 > FR2 > Router2 > Ethernet (Switched) Hub > Server

ATM

ISO OSI Seven Layer Model
ATM Switch

ATM Cell #1 Format AAL5

Carrier ATM Network

StatMux
ATM Version

OSU Campus Network ('95 - '01)

ATM Network

ATM PVC Set Up

ATM Connection Admission
Control

ATM Connection Admission Control

The Internet

Internet Service Provider Backbone

Slide 67

ISO OSI Seven Layer Model
IP Router

Internet Service Provider Network

Leased Lines

Light Path (Wave) Connectivity
(OC-48 or OC-192)

Internet Packet Format

Internet

Slide 74