This is the study or reference materials for 7 sem EC studensts.feedback is always welcome at suresha.vee@gmail.com

2. UNIT-1 Network Models Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327

8. Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 2.1 Layered Architecture *** Fig: 2.1 Seven layers of the OSI model

27. 4.TCP / IP PROTOCOL SUITE ( Transmission Control Protocol / Internet Protocol) Figure :TCP/IP and OSI model Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327

34. Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 1. Physical Addresses (cont…) Example 2.2 Most local-area networks use a 48 -bit (6-byte) physical address written as 12 hexadecimal digits; every byte (2 hexadecimal digits) is separated by a colon, as shown below: 07:01:02:01:2C:4B A 6-byte (12 hexadecimal digits) physical address.

40. UNIT-1 Using Telephone and Cable Networks for Data Transmission Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327

67. Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 ADSL Loop Architecture(not in the syllabus) Subscriber premises Central Office ISP Voice Switch DSL

90. Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 THE END OF UNIT- 1 NETWORK MODEL S

91. Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 Acknowledgement : My Sincere Thanks To The Author Prof.BEHROUZ A FOROUZAN. Because The Above Presentation Materials Are Heavily Borrowed From His Textbook “Data Communication & Networking” 4 th Edition, publisher Tata McGraw Hill By Prof.Suresha V

92. Thank you Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 reach me at : suresha.vee@gmail.com

93. Suresha V. Professor, Dept. of E&C, KVG College Of Engineering. Sullia, D.K - 574 327 Keep going…..