MIS 111 Lecture Notes - Lecture 8: Tier 1 Network, Local Loop, Uunet

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

Document Summary

More timely and efficient access to information. They also interconnect at public network access points (naps) (tier 1) [company in canada that provides ua with connectivity]--backbone. Tier 2 isp pays tier 1 isp for connectivity to rest of internet [ua connects through that canadian company]--regional. Local and tier 3 isps are customers of higher tier isps and connect them to rest of the internet [uawifi]--local. Two metrics used by routing protocols are: Packets may following different routes through the network. Not affected by single points of failure (redirects signal)--original dod objective. During a major disaster, the public telephone network might become congested, but e-mails and texts can still be sent via packet switching. Under heavy use there can be a delay (latency) Data packets can get lost or become corrupted. Real-time video streams, such as streaming video, can lose frames when packets arrive out of sequence. How do we uniquely identify a host- Domain: type of organization (. edu, . com, . net)