Unit-1 intro to communication networks


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Unit-1 intro to communication networks

  1. 1. INTRODUCTION TO COMPUTER NETWORKS VINAYAK M.UMALE Department of Electronics & Telecommunication Engineering Shri sant Gajanan Maharaj college of Engineering (Ph : 07265 252116, Email : vmumale@ssgmce.ac.in)
  2. 2. About Myself About Myself My self Vinayak M. Umale, Associate Professor, Electronics and telecommunication Engineering Dept. SSGMCE has one of the largest networks in the Shegaon. SSGMCE Campus Network now has 2500 nodes providing connectivity to more than 2500 users in Academic Departments, Student Hostels and Residences. SSGMCE has 18 Mbps Internet Connectivity. All application servers (Mail, DNS, Proxy Caching, Web etc.) are maintained in-house. B.Tech (1988) and M.Tech (1997) from IIT Kharagpur Working in SSGMCE, Shegaon for more than 22
  3. 3. Course Content Course Content Lecture 1: Overview of the Course and Network Functions Lecture 2,3: Types of Networks, LAN, MAN, WAN Lecture 4,5: LAN Topologies-Mesh, Star, Bus, Ring Lecture 6,7: Layer Architecture: OSI Model& TCP/IP Model : Lecture 8,9: Switching Techniques-Circuit, Packet, Message, cell VMUmale
  4. 4. Course Content Course Content Lecture 10, 11: Peer to Peer Protocol, End to End, Hop to Hop Connectivity Lecture 12, 13, 14 : Flow Control: Need, Stop& wait flow control, Sliding window flow control Lecture 15,16, 17: Error Control (ARQ)-Stop and wait ARQ Go-Back-N ARQ Selective Repeat ARQ Lecture 18: Standard Data Link Control Protocol-HDLC
  5. 5. Course Content Course Content Lecture 19: LAN Architecture- LLC and MAC Lecture 20,21: Random Access Techniques- Pure Aloha system and Slotted Aloha System Lecture 22, 23: Contention Techniques-CSMA, CSMA/CD Lecture 24, 25: Control Access Techniques- Token Bus, TokenRing, Polling, FDDI
  6. 6. Course Content Course Content Lecture 26,27: Networking Devices Lecture 28,29: Routing Algorithms Lecture 30, 31: Least Cost Algorithms Lecture 32: Traffic Control
  7. 7. Course Content Course Content Lecture 33,34, 35: ATM Network Lecture 36: Frame Relay Network Lecture 37, 38: ISDN & BISDN
  8. 8. Course Content Course Content Lecture 39: Overview of TCP/IP-TCP & UDP Frame Format Lecture 40, 41, 42: Internet Protocol and IP addressing issues Lecture 43, 44: Internet Protocols: ICMP, ARP, RARP Lecture 45 Internet Protocols Datagram, Datagram Forwarding
  9. 9. References Books Behrouz A. Forouzan, Data Communication and Networking, TMH Andrew S. Tanenbaum, Computer Network, Prentice- Hall Willam stalling,Data and computer communication, MM Doughlas E. Comer, Computer Networks and Internet http://www.cisco.com/public/support/tac/documenta tion.html
  10. 10. Grading Guidelines Grading Two ClassTest Exams: 5% each TEC: 5% Attendance: 5% End Exam: 80% Minimum 75% attendance and minimum 50% marks are necessary to clear the course.
  11. 11. Introduction to Computer Networks INTRODUCTION TO COMPUTER NETWORKS
  12. 12. Computer Networks Computer network connects two or more autonomous computers. The computers can be geographically located anywhere. Introduction to Computer Networks
  13. 13. LAN, MAN & WAN Introduction to Computer Networks Network in small geographical Area (Room, Building or a Campus) is called LAN (Local Area Network) Network in a City is call MAN (Metropolitan Area Network) Network spread geographically (Country or across Globe) is called WAN (Wide Area Network)
  14. 14. Applications of Networks Introduction to Computer Networks Resource Sharing Hardware (computing resources, disks, printers) Software (application software) Information Sharing Easy accessibility from anywhere (files, databases) Search Capability (WWW) Communication Email Message broadcast Remote computing Distributed processing (GRID Computing)
  15. 15. Network Topology The network topology defines the way in which computers, printers, and other devices are connected. A network topology describes the layout of the wire and devices as well as the paths used by data transmissions. Introduction to Computer Networks
  16. 16. Bus Topology Commonly referred to as a linear bus, all the devices on a bus topology are connected by one single cable. Introduction to Computer Networks
  17. 17. Star & Tree Topology Introduction to Computer Networks The star topology is the most commonly used architecture in Ethernet LANs. When installed, the star topology resembles spokes in a bicycle wheel. Larger networks use the extended star topology also called tree topology. When used with network devices that filter frames or packets, like bridges, switches, and routers, this topology significantly reduces the traffic on the wires by sending packets only to the wires of the destination host.
  18. 18. Ring Topology Introduction to Computer Networks A frame travels around the ring, stopping at each node. If a node wants to transmit data, it adds the data as well as the destination address to the frame. The frame then continues around the ring until it finds the destination node, which takes the data out of the frame. Single ring – All the devices on the network share a single cable Dual ring – The dual ring topology allows data to be sent in both directions.
  19. 19. Mesh Topology The mesh topology connects all devices (nodes) to each other for redundancy and fault tolerance. It is used in WANs to interconnect LANs and for mission critical networks like those used by banks and financial institutions. Implementing the mesh topology is expensive and difficult. Introduction to Computer Networks
  20. 20. Network Components Introduction to Computer Networks Physical Media Interconnecting Devices Computers Networking Software Applications
  21. 21. Networking Media Networking media can be defined simply as the means by which signals (data) are sent from one computer to another (either by cable or wireless means). Introduction to Computer Networks
  22. 22. Networking Devices Introduction to Computer Networks HUB, Switches, Routers, Wireless Access Points, Modems etc.
  23. 23. Computers: Clients and Servers In a client/server network arrangement, network services are located in a dedicated computer whose only function is to respond to the requests of clients. The server contains the file, print, application, security, and other services in a central computer that is continuously available to respond to client requests. Introduction to Computer Networks
  24. 24. Networking Protocol: TCP/IP Introduction to Computer Networks
  25. 25. Applications E-mail Searchable Data (Web Sites) E-Commerce News Groups Internet Telephony (VoIP) Video Conferencing Chat Groups Instant Messengers Internet Radio Introduction to Computer Networks
  26. 26. THANKS A LOT Introduction to Computer Networks
  27. 27. Course Content Course Content Internet Protocol (IP) and IP Addressing,Demo and Practice of Setting up Subnets and IP Address,,Routing, VLAN, TCP and UDP, SNMP, Natting, Firewall and VPN, Internet and Internet Applications (DNS, Email, Web..) , Cisco Basics, Cisco Switch and Router Configuration, Lab- Demo and Practice of Cisco Switch Configuration, Lab: Demo and Practice of Cisco Router Configuration, DNS & Web Server Setup on Linux, Lab: Demo and Practice of DNS and Web Server Setup, Enterprise Network Implementation, Mail Server, Proxy Server & Firewall Setup on Linux, Lab 8: Demo and Practice of Mail Server , Proxy Server and Firewall Setup
  28. 28. Course Content Course Content
  29. 29. Course Content Course Content