1. Organization connectivity Skills: none IT concepts: structure within an organization LAN, options for connection to the Internet This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License.

2. Where does this topic fit? Internet concepts –Applications –Technology (communication) –Implications Internet skills –Application development –Content creation

3. Connectivity within the organization LAN The Internet How does the LAN connect to the Internet? How are the computers connected inside the LAN? LAN

4. Campus fiber backbone

5. Building 1 Building 2 Building 3 Building n … Central node (ERC building) Internet 1 gbps links star topology The campus LAN

6. 48 port switch 1 48 port switch 2 48 port switch 3 48 port switch n … Main switch Inside each building To the central campus node 100 mbps 1 gbps

7. Data center Campus router The central campus node Firewall CSU router Responsibility of CSUDH 1 gbps AT&T Links from campus buildings Downtown LA

8. 48 port switch Building switch Central node Data center User to Internet

9. Data center

10. Air conditioning and backup power on the roof

11. The link to the data center Internet How does the LAN connect to the Internet? How are the computers connected inside the LAN? LAN

12. DesignationSpeed (mbps) T11.5 T343 OC3150 OC12601 OC241,202 OC482,405 OC1929,621 OC76838,486 OC3072153,955 Traditional leased line speeds

13. IEEE 802.3, 1982, thick, rigid coax 10 mbps 185 meters Fiber and copper wire 100 gbps 100 kilometers Ethernet “LAN” evolution

14. Metropolitan area ethernet

15. Wireless connectivity Terrestrial Satellite

16. Service level agreement Speed Latency (ping time) Reliability Time to repair Compensation Sample service level agreement

17. A few questions

18. How does the speed of the of links between wired computers and building switches compare to that of WiFi? How does the speed of the of links between wired computers and building switches compare to that of the links between buildings? How does the speed of the links between buildings compare to that of WiFi? How does the speed of the link between the campus LAN and the downtown datacenter compare with WiFi?

19. Organization connectivity Skills: none IT concepts: structure within an organization LAN, options for connection to the Internet This work is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 License.