Oct16 - CSE/ECE404: Computer Networks Instructor: Dr. Liang...

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CSE/ECE404: Computer Networks Instructor: Dr. Liang Cheng Department of Computer Science and Engineering P.C. Rossin College of Engineering & Applied Science Lehigh University October 16, 2007
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 10/16/07 Outline ± Recap ± Internetworking ± Summary and homework
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 10/16/07 IP-based Internet ± Concatenation of networks ± Router ± Gateway (e.g. WAP) ± Protocol stack ± Best effort service R2 R1 H4 H5 H3 H2 H1 Network 2 (Ethernet) Network 1 (Ethernet) H6 Network 3 (FDDI) Network 4 (point-to-point) H7 R3 H8 R1 ETH FDDI IP IP ETH TCP R2 FDDI PPP IP R3 PPP ETH IP H1 IP ETH TCP H8
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 10/16/07 Best Effort Service Model ± Connectionless packet routing/forwarding ± Best-effort delivery (unreliable service) ± Packets could be lost ± Packets could be delivered out of order ± Packets could be delayed for a long time ± Duplicate copies of a packet could be delivered ± Addressing
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Instructor: Dr. Liang Cheng
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Oct16 - CSE/ECE404: Computer Networks Instructor: Dr. Liang...

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