The document discusses the connectivity within an organization's local area network (LAN) and how the LAN connects to the Internet. It describes the organization's campus network topology with buildings connected via fiber links to a central node, and switches within each building connecting computers. The central node connects to the data center and Internet via high-speed fiber links. Wireless connectivity and service level agreements for network links are also mentioned.

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.

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

11. Traditional leased line speeds 1,202 OC24 9,621 OC192 38,486 OC768 153,955 OC3072 2,405 OC48 601 OC12 150 OC3 43 T3 1.5 T1 Speed (mbps) Designation

12. Metropolitan area ethernet

13. Wireless connectivity Terrestrial Satellite

14. Service level agreement Speed Latency Reliability Time to repair Compensation Sample service level agreement

15. A few questions

16. 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?

17. 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.