Packet switching

Natural disasters have become very critical due to several reasons like global warming. Wireless sensor networks are used for detecting the natural events by measuring the temperature, air pressure, vibration, etc. and generate alarms. WSNs can measure the agitation of buildings, CO2 levels, and weather monitoring, etc. (Yawut & Kilaso, 2011). WSN that utilized Zigbee/IEEE802.15.4 is utilized as a weather monitoring network. It sends the information about the weather and generates hazard alarms.

Isolation Mechanism for Jamming Attack in MANET 1. Introduction Mobile Ad-hoc Network (MANET) attached in a dynamic manner and it is an assembly of wireless mobile nodes. Without any fixed infrastructure nodes making a temporary network where all nodes are arbitrarily free to move. In the network nodes are act as routers, which take part in finding and maintenance of routes to other nodes [1]. Wireless connection in MANET is highly misplay and due to mobility of nodes it goes down

the sender of a packet determines the complete sequence of nodes through which the packet has to pass. The sender lists this route in the packet’s header, to identify each forwarding “hop” by the address of the next node to which to transmit the packet on its way to the destination node There are two basic steps of DSR protocol: (i) Route discovery and (ii) Route maintenance. Every node in the network maintains a cache to store latest discovered paths. Before a node sends a packet, it first checks

point-to-point links with indicated one-way BW/delay // - CBR/UDP flows from n0 to n3, and from n3 to n1 // - FTP/TCP flow from n0 to n3, starting at time 1.2 to time 1.35 sec. // - UDP packet size of 210 bytes, with per-packet interval 0.00375 sec. // (i.e., DataRate of 448,000 bps) // - DropTail queues // - Tracing of queues and packet receptions to file "simple-global-routing.tr" #include #include #include #include #include "ns3/core-module.h" #include "ns3/network-module.h" #include "ns3/internet-module

r_hdr->ether_type)) { case ETHERTYPE_IP: assert(ethr_hdr); struct ip* ip_hdr=get_ip_hdr(packet); uint32_t dst_ip = ip_hdr->ip_dst.s_addr; uint32_t src_ip= ip_hdr->ip_src.s_addr; struct ip* ip_hdr1=get_ip_hdr(packet); uint32_t src2= ip_hdr1->ip_src.s_addr; struct sr_ethernet_hdr* ethr_hd1 = (struct sr_ethernet_hdr *) packet; if (sr->gateways[0].ip == 0) { sr->gateways[0].ip = src2; sr->gateways[0].iface = sr_get_interface(sr

A Real Time Leaky Bucket Based Admission Control Scheme for VoIP Networks Seminar Report Submitted By Arunima Goel Reg. No: 130907620 Section: B2 Department of Electronics and Communication Engineering MANIPAL INSTITUTE OF TECHNOLOGY (A Constituent Institute of Manipal University) MANIPAL-576 104 August 2016 INDEX SR. NO. TOPIC PAGE NO. 1. Introduction 3 2. Leaky Bucket Algorithm 3 3. Call Admission Control(CAC) 4 4. The RLB-CAC Technique 4 5. Transforming LB into

the link is used up to 100% in case of heavy traffic, around 70% for medium traffic and 20% for low traffic. The receiver logs are registered for each flow. Flows nature is UDP as UDP does not re-attempt to send a dropped packet. The packet size is fixed to 1024 and number of packets send per second can be changed depending on the traffic requirement. The following tables give the details of each flow which were simulated for network 1. The network was created in Mininet. It consists of 12 hosts and

This area discusses the NS parts, for the most part compound system segments. The foundation of the pecking order is the Tcl Object class that is the super class of all Otcl library objects scheduler, system parts, clocks and alternate articles including NAM related ones). As a predecessor class of Tcl object, Ns object class is the super class of all fundamental system part questions that handle bundles, which may form compound system protests, for example, hubs and connections. The fundamental

needed (i.e., if there are data to be exchanged between the source and the destination). An advantage of this approach is that the routing overhead is greatly reduced. A disadvantage is a possible large delay from the moment the route is needed (a packet is ready to be sent) until the time the route is actually acquired. In AODV, the network is silent until a connection is needed. At that point the network node that needs a connection broadcasts a request for connection. Other AODV nodes forward this

Samuelraj Vibin TELE 5330 – Fall 2014 NU ID: 001772299 Q1. 1a) NAME TTL TYPE DATA ns.test.com 1800 A 192.186.1.1 test.com 1800 NS ns.test.com 1b) i) When it is very expensive and slow to access the external network: Forwarding dns server is used. A forwarding server is a type of DNS server which simply forwards requests to another DNS server and caches the results. The forwarding DNS server provides recursive query support which results in only a single query across the network thereby reducing the