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week 1 - Econ11 Trunks o o Dontwantlag 22:06 InternetDesign...

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Econ 11 22:06 Trunks o Trunk lines carry more than 1 call Frequency Division Multiplexing Time Division Multiplexing Telephone Network Design o Telephone networks were engineered for speed Don’t want lag Internet Architecture and Topology Internet Design o The Internet was originally engineered for data  File transfer, email o Service Characteristics Variable Bit Rate (bursty) Connection duration measured in seconds o Performance Loss often not ok (email) Delay –design variable Throughput- design variable Packet Switching o Idea: Decompose message into packets Transmit the packets one by one o Packet Switches/Routers replace telephone routers
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Instead of setting up “circuits” for each call, route packets one by one Packets are buffered, first in first out.
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