ECEN4533
Data Communications
Lecture #4 21 January
2009
Dr. George Scheets
ECEN4533 Data
Communications
Lecture #5 23 January
2009
Dr. George Scheets
PSTN: Wired Phone
POTS Call Sequencing
ISDN connection
using PSTN
Carrier PSTN Network
Moving Traffic with Packets
PSTN Connectivity via BRI
ISDN
Ex) Internet
Internet Service Provider
Backbone
Internet Call Sequencing
Ex) ATM
ATM Backbone
ATM Call Sequencing
Moving Traffic with ATM
Cells
Internet Packet Format
Internet Protocal v4
OSU Campus Network (>
2001)
OSU Internet Connectivity
(simplified)...
Traceroute to WWW.CISCO.COM
Traceroute to WWW.TULSA.COM
ISP Routes Not Necessarily
Optimum
Fall 2007 Weird Route Seen
by Student
Internet Protocal v6
Slide 25