17. The connection is shared by a number of subscribers, hence may raise performance and security problems Fiber-optic cable Cable company Coaxial Cable TV PC
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27. Layer interaction: OSI 7-layer model Host Router Router Host Hop by hop End to end Application Presentation Session Transport Network Link Physical Network Link Link Network Link Link Application Presentation Session Transport Network Link Physical Physical
29. OSI Model Application 7 Presentation 6 Session 5 Transport 4 DataLink 2 Network 3 Physical 1 Physical 1 DataLink 2 Network 3 Transport 4 Session 5 Presentation 6 Application 7 Computer A Computer B bits Data Data Data Chunked Data Packet Frame Bits
30. OSI Model Application 7 Presentation 6 Session 5 Transport 4 DataLink 2 Network 3 Physical 1 Physical 1 DataLink 2 Network 3 Transport 4 Session 5 Presentation 6 Application 7 Computer A Computer B bits Data Data Data Chunked Data Packet Frame Bits