Chapter 12 – Networks, Network Software, and the Internet

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Presentation transcript:

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

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.

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.

Terms Host Local Remote Topology

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

Network Hardware Hubs Switches

Network Hardware Routers

Network Hardware What happens hosts on this network communicate?

Network Topologies

Network Topologies Path through a network

Types of Networks LAN PAN MAN WAN

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

Network Protocols TCP/IP AppleTalk IPX

TCP/IP Protocol Stack Five Layers

TCP/IP Communication through the stack

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

IP Address Classes

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

LAB Determine your computer’s IP Address

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

Visualization of Internet Routing Paths The Opte Project July 2015

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

LAB The Internet Archive Wayback Machine

Creative Commons Statement