New IGNOU MCS-42 Help Book Data Communication and Computer Networks in English – MCA Computer Application Latest Edition Guide and Study Material.

Block 1 – Introduction to Data Communication and Computer Network Concepts
Introduction to Computer Network
Data Transmission
Data Encoding and Communication Technique
Multiplexing and Switching

Block 2 – Media Access Control and Data Link Layer
Data Link Layer Fundamentals
Retransmission Strategies
Contention-based Media Access Protocols
Wireless LAN and Datalink Layer Switching

Block 3 – Network Layer
Introduction to Layer Functionality and Design Issues
Routing Algorithms
Congestion Control in Public Switched Network
Internetworking

Block 4 – Transport Layer and Application Layer Services
Transport Services and Mechanism
TCP/UDP
Network Security-I
Network Security-II