A company with 4 different working units situated at different places as Unit1, Unit2, Unit3 and Unit4. The links of these units are managed as follows Link 1 connects Unit 1 to 2, Link 2 connects Unit 1 to 3 Link 3 connects Unit 2 to 4 Link 4 connects Unit 3 to 4 Links 5 and possibly 6 connect the Gateway Node to the network. The distance between every unit is 400metres where the LAN based solution is deployed using Ethernet.
You need to solve these two problems Problem 1::: Develop * A high quality video link between the unit 1 and Unit 2 (vid1 in both directions) * A medium quality video link from the unit 3 to unit 1 (vid2) At this time a video links fall into these categories. Video phone 64K very low quality Medium quality 6*64Kbps (less than VHS) High quality [url removed, login to view] broadcast TV quality. * A high-speed file transfer capability from unit 4 to unit3 (ftp1 in one direction only) * A fault tolerant design is required so that communication can be maintained between any two nodes if any single link fails * In your simulation demonstrate how the system recovers from any single link failure * Use the simulator ns2 to complete these tasks Problem 2:: * Upgrade the network design created to solve Problem 1 to provide a Gateway to the Internet * Create a new gateway node to allow access to the Internet, connect the Gateway via one (Link 5 ) or two links (Links 5 and 6) to the internal network * Assume that a video conference is taking place on the high speed link * Single users at each unit location initiate an FTP download from the Internet via the Gateway Node. * Undertake tests to determine the network design required to ensure that video packets are not lost during FTP download sessions Time when traffic should turn on:: Video conference traffic, turns on at [url removed, login to view], off at 5 sec ??" vid1 Unit 1 FTP download turns on at 1.1, off 4.1 ??" ftp2 Unit 2 FTP download turns on at 1.2, off 4.2 ??" ftp3 Unit 3 FTP download turns on at 1.3, off 4.3 ??" ftp4 Unit 4 FTP turns download on at 1.4, off 4.4 ??" ftp5
Windows xp/2k NS tool (Network simulator)