Best-effort Delivery IP AND UDP ARE NOT GUARANTEED TO DELIVER ALL MESSAGES. THE SERVICE THEY PROVIDE IS CALLED "BEST-EFFORT DELIVERY". IP AND UDP DON'T DO ANYTHING SPECIAL TO NOTICE OR REPLACE LOST OR DAMAGED MESSAGES. IP AND UDP DON'T DO FOOLISH THINGS THAT WOULD DELIBERATELY INCREASE PACKET LOSS.

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This page is part of a section of lecture slides related to " The Transmission Control Protocol " within the topic "The Internet Protocol Suite". Other slides within this section and other sections of slides for the topic "The Internet Protocol Suite" can be accessed using the links below. The Internet Protocol Suite TCP/IP = The Internet Protocol Suite The User Datagram Protocol & Ports Port Numbers and UDP Port Numbers and UDP (cont.) Port Numbers and the Client/Server Model Implementing UDP The Transmission Control Protocol Reliability Best-effort Delivery Router Congestion TCP TCP Implementation TCP Efficiency TCP as Internet Transport Protocol The Domain Name Service Domain Names Domain Name Servers Reliability and Retransmission A Reliable Delivery Problem Cautious Generals Solving the General's Problem Connections (Virtual Circuits)