IT Data Communication and Networks (Optional)

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1 - Data Communication and Networks (Optional) INTRODUCTION This is one of the optional courses designed for Semester 4 of the Bachelor of Information Technology Degree program. This course on Data Communication and Networks provides an introduction to the fundamental concepts on data communication and the design, deployment, and management of computer networks. CREDITS: 04 LEARNING OUTCOMES After successful completion of this course students will be able to Identify the different components and their respective roles in a communication system Propose efficient, cost effective, reliable and appropriate technology to establish communication links Design an enterprise network employing the common LAN technologies and be able to evaluate the advantages and disadvantages Configure a PC to work as a host in a TCP/IP network and to use the IP based commands to facilitate the trouble shooting process Describe the technical issues related to the Wide Area Networks and identify the common technologies available in establishing WAN infrastructure Describe the specific actions that can be taken to enforce network level security. MINOR MODIFICATIONS When minor modifications are made to this syllabus, those will be reflected in the Virtual Learning Environment (VLE) and the latest version can be downloaded from the relevant course page of VLE. Please inform your suggestions and comments through the VLE. ONLINE LEARNING MATERIALS AND ACTIVITIES You can access all learning materials and this syllabus in the VLE: if you are a registered student of BIT degree program. It is very important to participate in learning activities given in the VLE to learn this subject. 1 of 8 pages

2 ONLINE ASSIGNMENTS The assignments consist of two quizzes, assignment quiz 1 (It covers the first half of the syllabus) and assignment quiz 2 (It covers the second half of the syllabus). Maximum mark for a question is 10, minimum mark for a question is 0 (irrespective of negative scores). Final assignment mark is calculated considering 40% of assignment quiz 1 and 60% of assignment quiz 2. Pass mark for the online assignments in a course is 50. You are advised to do online assignments before the final exam of the course. It is compulsory to pass all online assignments to partially qualify to obtain year 2 certificate. FINAL EXAMINATION Final exam of the course will be held at the end of the semester. Each course in the semester 4 is evaluated using a two hour question paper. OUTLINE OF SYLLABUS Topic Hours 1- Fundamentals of digital communications Physical layer characterization Data transmission mechanisms Network architectures Internet protocols Local area networks Practical aspects of networking 08 Total for the subject 60 REQUIRED MATERIALS Main Reading Ref 1: Tanenbaum Andrew S., Computer Networks, 4 th edition (2 nd Impression 2006) Ref 2: William Stallings, Data and Computer Communications, 7th Edition (3 rd Impression 2007) Ref 3: Teacher s note 2 of 8 pages

3 Supplementary Reading Ref 4: Larry L. Peterson, Bruce S. Davie, Computer Networks: A Systems Approach, 4th Edition Ref 5: Halsall Fred, Data Communications, Computer Networks and OSI, 4th edition (10th Indian reprinting 2005) DETAILED SYLLABUS: Topic 1: Fundamentals of digital communications (03 hrs) Describe the basic concept of communications and the electronic implementation of communications paradigms Identify the characteristics and the analyze the signals properties Material /Sub Topics 1.1. Introduction to digital communications [Ref 2: pg.72-83] Definitions of terms Signal propagation Signal types Sine waves Square waves Signal parameters Amplitude Frequency Phase 1.2. Channel effects on transmission [Ref 1: pg.85-89]/ [Ref 2: pg.92-98] Attenuation Effects of limited bandwidth Delay distortion Noise 1.3. Data rate limits in channels[ref 1: pg.89-90]/ [Ref 2: pg ] Nyquist's theorem Shannon's theorem 3 of 8 pages

4 Topic 2: Physical layer characterization (06 hrs) Describe how digital data can be transmitted using analog transmission facilities Map a binary pattern into a signal encoded using different encoding schemes Select a suitable transmission medium/media for the implementation of a communication network Recognize the constrains related to the practical usage of transmission media Material /Sub Topics 2.1. Transmission Media [Ref 1: pg ] [Ref 2: pg ] Twisted pair cables Co-axial cables Fiber optic cables Wireless media 2.2. Physical Layer Interfaces [Ref 2: pg ] RS 232 / EIA 232/ USB Topic 3: Data transmission mechanisms (10 hrs) Describe the design issues related to data transfer Compare and contrast the circuit and packet switching technologies Describe the concept and the use of multiplexing technologies Describe error control mechanisms Material /Sub Topics 3.1. Communication modes [Ref 1: pg.129] / [Ref 2: pg.73] Simplex Half-duplex Full - duplex 3.2. Transmission modes Serial transmission 4 of 8 pages

5 Parallel transmission 3.3. Synchronization [Ref 2: pg ] Asynchronous transmission Synchronous transmission 3.4. Introduction to packet switching [Ref 1: pg ]/ [Ref 1: pg ] / [Ref 1: pg.32-33] Circuit switching vs. packet switching Types of services Connection oriented services (Virtual circuits) Connectionless services (Datagrams) 3.5. Multiplexing [Ref 1: pg ]/ [Ref 2: pg ] Frequency division multiplexing Synchronous time division multiplexing Statistical time division multiplexing 3.6. Error control methods [Ref 1: pg ] Feedback error recovery (ARQ) (Eg: Based on parity check) Forward error correction (FEC) (Eg; CRC) Topic 4: Network architectures (04 hrs) Describe the advantages of a layered architecture Illustrate the roles of each layer in the OSI model two process - process communication Provide a description of the emergence and the evolution of computer networks Discuss the selection of suitable geometric layout for a network based on the standard topologies Outline the features of different types of computer networks Material /Sub Topics 4.1. Introduction to computer networks[ref 1: pg.1-80] 4.2. Network topologies: Bus, Star, Ring [Ref 1: pg.16-17] 4.3. Types of networks [Ref 1: pg.15-21] Local area networks Wide area networks 5 of 8 pages

6 Personal area networks 4.4. Layered network model [Ref 1: pg.37-49] /[Ref 2 : pg.36-63] OSI model TCP/ IP model Topic 5: Internet protocols (12 hrs) Give a description of the TCP/IP protocol suite including the roles of major protocols Configure an IP address block into a given number of subnets Use the IP based diagnostic commands to support troubleshooting in IP networks Describe IP routing mechanisms Describe the popular application layer protocols in the Internet Recognize the limitations of IP version 4 and the advantages of IP version6 Material / Sub Topics 5.1 Introduction [Ref 1: pg.41-44]/ [Ref 1: pg ] History of the Internet protocols Internet protocol stack IP Addressing and Routing (Version 4) [Ref 1: pg ]/ [Ref 1: pg ]/ [Ref 1: pg ]/ [Ref 1: pg , ] Subnetting :Fixed and variable length Unicast routing algorithms 5.2 Transport Layer protocols [Ref 1: pg ] / [Ref 2: pg ] TCP UDP 5.3 IP Support Protocols [Ref 1: pg ] ARP DHCP ICMP 5.4 Application Layer Protocols [Ref 1: pg ] [Ref 2: pg ] Domain Name System (DNS) SMTP, POP, IMAP 6 of 8 pages

7 5.4.3 FTP HTTP RTP and Vo IP 5.5 IP version 6 [Ref 1: pg ] Topic 6: Local area networks (13 hrs) Compare and contrast different LAN technologies such as IEEE 802 LAN standards Describe the problem of channel allocation in the LAN segments and the solutions used Design a large Ethernet network using hubs and switches and to suggest the suitable devices to provide the connectivity to the other outside networks Describe the problems associated in deploying a wireless LAN and propose solutions Material / Sub Topics 6.1 Introduction to LANs [Ref 1: pg.16-17]/ [Ref 1: pg ]/ / [Ref 2: pg ] 6.2 Conventional LAN Architectures [Ref 1: pg ]/ [Ref 1: pg ]/ Access Protocols: CSMA/CD,Token Passing Interconnecting devices: Hubs, L2 /L3 Switch 6.3 IEEE 802 MAC layer standards :802.3, , [Ref 1: pg ] / [Ref 1: pg ] 6.4 Switched Ethernet variants: Fast Ethernet, Gigabit Ethernet, 10Gb Ethernet [Ref 1: pg ] / [Ref 2: pg ] 6.5 Wireless LANs: (802.11) [Ref 1: pg , ] Access methods: CSMA/CA Frequency Bands: ISM Operating Modes: adhoc, Managed Variants: a/ b/ g/ n Wireless interconnection devices: Hub, Router 6.6 Bluetooth (802.15) wireless personal area network [Ref 1: pg ] 7 of 8 pages

8 Topic 7: Practical aspects of networking (06 hrs) Identify the techniques of securing a private network Describe issues in structured cabling Identify connecting options made available by service providers Material / Sub Topics 7.1 Structured cabling and specifications: Standards CAT5, 5E, etc Network security [Ref 1: pg ]/ [Ref 1: pg ]/ [Ref 1: pg ] ]/ [Ref 1: pg ] Firewalls and NAT VLANs, VPNs Proxy servers Wireless security 7.3 User access technologies [Ref 1: pg ] / [Ref 1: pg ] / [Ref 1: pg ] / [Ref 1: pg ] Wired: xdsl, FTTH Cellular wireless: GPRS, EDGE, HSPDA Broadband wireless: of 8 pages

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