Sept27 - CSE/ECE404: Computer Networks Instructor: Dr....

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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 September 27, 2007
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 09/27/07 Outline ± Recap ± MAC efficiency ± Switching and forwarding ± Bridges and LAN switches ± Summary and homework
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 09/27/07 Virtual Circuit Switching ± Explicit connection setup (and tear- down) phase ± Permanent VC vs. switched VC: virtual circuit identifier ± Subsequence packets carrying VCI follow same circuit ± Connection-oriented model ± Analogy: phone call ± Each switch maintains a VC table
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 09/27/07 Datagram Switching ± No connection setup phase; complete destination address ± Packet forwarded independently ± Connectionless model
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Instructor: Dr. Liang Cheng CSE/ECE404: Computer Networks 09/27/07 Virtual Circuit Model ±
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Sept27 - CSE/ECE404: Computer Networks Instructor: Dr....

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