MIS 111 Lecture Notes - Lecture 8: Tier 1 Network, Packet Switching, Uunet

• School: University of Arizona
• Department: Management Info Systems Main
• Course: MIS 111
• Professor: W.Neumann, M.Patton

Document Summary

Today"s lecture: data networking, and network security, you will have an opportunity to learn, how networks of computers work together to transmit information, how computers use protocols to manage information and networks. Strategic use of data networking: how does data networking create, strategic advantage for businesses, more efficient and effective business operations, geographical distance irrelevant (globalization, more timely and efficient access to information, enables a flexible and mobile workforce. End-user device: multi-media, video, audio, encryption, productivity. Friday, september 30, 2016: office, ethernet / wireless, dns/email/security. Local loop / isp: local loop, pots/dsl/cable, satellite/plc/wimax, isps, pops, dns/email/services. Backbone and content services: connectivity, content distribution, content providers. Internet structure: network of networks: hierarchical network design. At center: tier-1 isps (e. g. , uunet, bbn/genuity, sprint, at&t), national/ international coverage. Connect to one or more tier-1 isps, possibly other tier-2 isps. Tier-3 isps and local isps last hop ( access ) network (closest to end systems) Packet: two metrics used by routing protocols are: