1. Chapter 12 – Networks, Network Software, and the Internet
CMIT100
Chapter 12 – Networks, Network Software, and the Internet

2. Learning Objectives Describe the role of network broadcast devices.
Differentiate between types of network media.
Compare network topologies and classifications.
Discuss the role of each layer in the TCP/IP protocol stack and the OSI model.
Explain IPv4 addressing and compare it to IPv6.
Introduce popular forms of network software.
Present a brief history of the Internet.
Describe how communication takes place over the Internet.

3. What is a Network?
A collection of computers and computer resources connected in such a way that the computers can communicate with each other and their resources.

4. Terms
Host
Local
Remote
Topology

5. Network Hardware Cabling Connectors Twisted Pair (CAT5e/6) Coaxial
Fiber Optic
Connectors
RJ45
BNC
ST, SC, LC
And many more…

6. Network Hardware
Hubs
Switches

7. Network Hardware
Routers

8. Network Hardware
What happens hosts on this network communicate?

9. Network Topologies

10. Network Topologies
Path through a network

11. Types of Networks
LAN
PAN
MAN
WAN

12. Physical Protocols
Protocol: The set of rules established to govern how people behave and interact with each other.
Ethernet
CSMA/CD
Frame Relay
Token Ring
LocalTalk
NetBEUI

13. Network Protocols
TCP/IP
AppleTalk
IPX

14. TCP/IP
Protocol Stack
Five Layers

15. TCP/IP
Communication through the stack

16. 192.168.1.100 IP Addresses Uniquely identifies a host on a network
32-bit Address
Four Octets

17. IP Address Classes

18. Public vs. Private IP Addresses
Private addresses are non-routable on the Internet

19. LAB
Determine your computer’s IP Address

20. The Internet A global system of interconnected computer networks
A network of networks
Links several billion devices worldwide

21. Visualization of Internet Routing Paths
The Opte Project
July 2015

22. History of the Internet
Created in the late 1960’s by the DoD Advanced Research Projects Agency
ARPANET
Linked Military facilities, Universities
Nine computers on ARPANET in June 1970
57 computers on ARPANET by 1975
Renamed Internet in 1983
Hypertext Documents, HTTP
The first web browser, Mosaic developed in 1994

23. LAB
The Internet Archive Wayback Machine

24. Creative Commons Statement