1. Intro to Networking
Thomas Holt Russell
SEMtech Director

2. What is a Computer Network?
A set of computers connected together for the purpose of sharing resources.

3. Networks are use for email, video conferencing, instant messaging
Enable users to share a single hardware device such as printers and scanners
enable file sharing
Enable software sharing
makes information easier to access and maintain

4. Different Types of Networks
Local Area Networks (LAN)
A small network, limited to a single collection of machines and linked together interconnecting devices in a small geographic area

5. Different Types of Networks
Metropolitan Area Network (MAN)
An internetwork confined to a geographic region, such as a city or county; uses 3rd party communications providers to provide connectivity

6. Different Types of Networks
Wide Area Network (WAN)
Internetworks that are geographically dispersed and use 3rd party communications providers to provide connectivity between locations

7. Clients and Servers
Client - a workstation running a client OS or network software that request resources from a server
Server is a computer with software installed on it that provides a network service to client computers

8. Client Server & Peer-to-Peer

9. Different Types of Networks
Peer-to-Peer Networks
All computers can function as clients or servers as needed. There’s no centralized control over network resources

10. Different Types of Networks
Client Server Networks
Provide centralized control over network resources.

11. Strengths & Weaknesses of P2P and Server Based Networks

12. Network Topologies
Star - all computers & devices are connected to a centrally located hub/switch

13. Network Topologies
Bus - all computers and devices are connected in a series to a single linear cable called a trunk or backbone. No central point. Bothe ends must be terminated.

14. Network Topologies
Ring - all computers and devices are connected to a cable that forms a closed loop. Each computer is a repeater. If one computer fails the whole network goes down.

15. Internet
The Internet is the most common resource shared today

16. Is the Internet and World Wide Web (WWW) the same thing?
The Answer is Absolutely Not!
Internet - is a computer network that links millions of computers all over the world (the physical network)
World Wide Web - Is a collection of Web pages available through the Internet

17. From ARPANET to Internet 2
ARPARNET - Came before the Internet
Created in 1969 and stood for Advanced Research ProjectsAgency