IST 233 Lecture Notes - Lecture 4: Asics, Network Congestion, Network Architecture
20 Mar 2018
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Document Summary
Efficiency of circuit switching for voice and data: voice traffic: fairly constant use. Circuit switching is fairly efficient: data traffic: short bursts, long silences; circuit switching is very inefficient. Wire shark: packet sniffing software, very important to be able to use. Packets and messages: original message a, fragmented into packets acx, two key benefits, more efficient, a lot quicker to resend a portion of a message, rather than the whole message again if something gets damaged in a packet. Packet switching and multiplexing: packets of different conversation, are multiplexed, reducing cost per conversations. Packet switch forwarding decisions: packet switching was invented in 1969, packet switching networks often have a mesh topology, mesh topology: helps maintain resilience of networks, to increase efficiency (picture) The least number of hops per point, is better. Internetworking: when talking about global internet, capitalize the i Ip packets are carried inside the data portion of network frames (ethernet, wi-fi, lte, etc. )
