ENG EC 441 Lecture Notes - Lecture 13: Network Congestion, Network Layer, Institute For Operations Research And The Management Sciences

• School: Boston University
• Department: Electrical & Computer Engineering
• Course: ENG EC 441
• Professor: Jeffrey Carruthers

Document Summary

Connectionless transport: udp: as ide from multiplexing/ demultiplexing and s ome light error checking, the trans port protocol adds nothing to the ip . No hands haking between udp s ender and receiver: udp s egments may be los t, delivered out of order to application, c onnectionles s , e xample. E ach udp s egment handled independently of others. D ns making a query; it cons tructs a d ns query mes s age and pas s es the mes s age to udp to add header fields and pas s to network layer. No connection es tablis hment (which can add delay) S imple; no connection s tate at s ender or receiver. S mall s egment header overhead (8 bytes while t c p has 20 bytes ) No conges tion control; udp can blas t away as fas t as des ired.