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COMPUTER NETWORKS Paper Code: ETCS-306 Paper: Computer Networks L 3 T/P 1 C 4 INSTRUCTIONS TO PAPER SETTERS: MAXIMUM MARKS: 75 1. Question No. 1 should be compulsory and cover the entire syllabus. This question should have objective or short answer type questions. It should be of 25 marks. 2. Apart from Question No. 1, rest of the paper shall consist of four units as per the syllabus. Every unit should have two questions. However, student may be asked to attempt only 1 question from each unit. Each question should be of 12.5 marks. Objective: To understand the basics of networking with reference to OSI and TCP/IP models. UNIT–I Introduction: Internet History, Uses of computer networks, Network hardware, network software, Protocol layering, Reference models (OSI & TCP/IP), Network standardization. The Physical Layer: Theoretical basis for data communication, Transmission media: Guided and Unguided media, Switching (circuit, packet), Multiplexing (FDM, WDM, and TDM), Overview of PSTN, ISDN, and ATM. [T1,T2][No. of Hrs. 10] UNIT-II The Data Link Layer: Data link layer design issues, Error detection and Correction Techniques, Elementary data link control protocols, Sliding window protocols, Example data link protocols (HDLC and PPP). The Medium Access Sub layer: The channel allocation problem, multiple access protocols, IEEE standard 802.3 & 802.11 for LANS and WLANs, Network devices-repeaters, hubs, Bridge, Switches and Routers. [T1][T2][No. of Hrs. 12] UNIT-III III Transmission Networks: PDH Networks, SONET/SDH Networks, DWDM Networks, Introduction to Cell Switched Networks e.g Asynchronous Transfer Mode (ATM) and Packet Switched Networks. The Network Layer: Network layer design issues, routing algorithms, congestion control algorithms ,Quality of Service, Introduction to IPv4 Addressing, Subnetworks and Subneting, IPv4 protocol Packet Format, Forwarding of IP packets, IPv4 vs IPv6, Congestion control algorithms. Delay Models in Data Networks: Queueing Models, M/M/1 Queueing System, M/M/m/m and Markov Systems. [T1][T2][No. of Hrs. 12] UNIT - IV Transport layer: Transport layer services, Elements of transport protocols, Overview of UDP and TCP. [T1][No. of Hrs. 12] Text Books: [T1] Dimitri Bertsekas and Robert Gallager, “Data Networks", PHI. [T2] Behrouz A.Forouzan, 'Data Communication and Networking', 5E, Tata McGraw Hill, 2013. Reference Books: [R1] Uyless Black, "Computer Networks-Protocols, Standards and Interfaces", 2nd edition, PHI, 1996. [R2] A. Tannenbaum,"Computer Networks", 5th edition, Pearson.