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B.C.A. Part-II, Sem-V, Paper- 503 Computer Network, , UNIT -1Basies of Data communication 12, 1.1. Data Communication concept, 1.1.1 Components-sender, receiver, message, transmission media, 1.1.2 Data Flow- simplex, half-duplex, or full-duplex, 1.2 Networks, 1.2.1 Definition, Advantages and disadvantages, 1.2.2 Categories of Networks- LAN, WAN. MAN, 1.2.3 Network Architecture-Client-Server and Peer to peer, 1.3 Multiplexing and switching, 1.3.1 Frequency-Division Multiplexing, Wavelength-Division Multiplexing,, Time-Division Multiplexing, 1.3.2 Circuit switching, Packet Switching, Message Switching, , UNIT — 2 Transmission media and Reference Models 12, 2.1 Transmission Media, , 2.1.1 Guided Media - Twisted-Pair Cable, Coaxial Cable, Fiber-Optic Cable, 2.1.2 Unguided Media: Radio Waves, Microwaves, Infrared, satellite, communication, 2.2 Transmission Modes- Parallel and Serial -( Asynchronous, Synchronous), 2.3 Reference Models, 2.3.1 OSI reference model, 2.3.2 TCP/IP reference model, 2.3.3 Comparison of OSI and TCP/IP reference model, 2.4 Protocol Standards:, , 2.5 IP address scheme and characteristics of IP address, , BCA Revised Syllabus wees 2015-16