Wireless Network Topology Essay

In the design, the topology used is a star topology. The computers in every office or classroom are linked to the central device known as the switch. The star topology leads to the expansion of the network without any disruption. This defines the use of a hub, a router or a switch to interconnect various computers together. All the workstations in this topology are connected with a connection of point-to-point to the central device. The data is first passed through the primary device before reaching the planned destination. Hub controls and manages the whole network. The hubs connect several nodes that are present in the star system. The hub acts as the signal booster (Elhakeem, 2010).

All stations are connected by cable or wireless to a central point, such as hub or a switch. If the central node is operating in a broadcast fashion such as a Hub, transmission of a frame from one station to the node is retransmitted on all of the outgoing links. In this case, although the arrangement is physically a star, it is logically a bus. In the case of the central node acting as switch, an incoming frame is processed in the node and then retransmitted on an outgoing link to the destination station. Ethernet protocols IEEE 802.3 are often used in the Star topology LAN.

The CSC consists of a sequence of four steps which are executed in sequence: \textit{(i)} Nodes use their maximum transmission power to connect to their neighboring nodes; \textit{(ii)} CC-links are established to increase connectivity; \textit{(iii)} The resulting topology from steps 1 and 2 are combined and we use topology control to select the routes towards the sink node that reduce the number of hops to reach the sink node.

A Star topology is the second type of topology represented. This topology is easy to install as well as being easy to expand by connecting additional nodes or devices. Faults are easily detected and parts are easy to remove. In a Start topology, when devices need to be added or removed, it does not cause disruptions to the network. This type of topology is used for many different applications, ranging from small to large networks. (FCIT, Univ. of Florida)

• A failure in any cable or device breaks the loop and can take down the

Star – All computers and devices are connected to a centrally situated hub or switch. The hub or switch collects and distributes the flow of knowledge at intervals the network. It’s higher to use a switch than a hub as a result of a switch transmits the info to the supposed recipient instead of to all or any hosts on a network.

In a redundant mesh topology network devices are connected with many redundant interconnections between network nodes. In a true mesh topology every node has a connection to every other node in the network. A mesh network with redundant connections is an example of a redundant topology. The level of redundancy can be measured by network connectivity.

A group of wireless sensor nodes (devices) dynamically constructs a temporary network without the exercise of any pre-existing network infrastructure or centralized administration. The main goal of ad-hoc networking is multihop broadcasting in which packets are transferred from source node to destination node through the intermediate nodes (hops). The main function of multi hop WSN is to enable communication between two terminal devices through a bit of middle nodes, which are transferring information from one level to another level. On the foundation of network connectivity, it dynamically gets to determine that which nodes should get included in routing, each node involved in routing transmit the data to further

The coordinator is the primary receiver in the network, which receives the sensor data and displays them. Thus, we can easily conclude that the end devices and the coordinator are not having equivalent capabilities.

A WSN is a type of wireless networks that consists of collection sensor nodes which are tiny devices. Each sensor node of the network has different processing capability. It may contain multiple types of memory (program, data and flash memories), have a RF transceiver, have a power source (e.g., batteries and solar cells), and accommodate various sensors and actuators. The nodes communicate wirelessly and often self-organize after being deployed in an ad hoc fashion [13, 14]. Optimum need of each sensor node is to maximize its own utility function. Also the whole network requires resource assignments balance to perform in a useful and efficient way. This chapter presents a brief survey on WSNs showing its types, characterizing features, protocols and applications.

This mesh type application of switches provides multiple paths for network traffic to flow. What this means is that if one link in the traffic flow or a switch goes down, traffic can continue to flow using an alternate path. This type of mesh

First, we need to understand the difference between logical and physical topographical layouts. Logical layouts are how the data move across the network and physical layouts are how the network relates to its wires and hardware (Kevin Wallace, 2012). Note that how the data moves through the network is not going to be the same as how the data is physically structured (Michael Harris, 2008). The most coming physical topologies are Bus, Star, and Star-Wire Ring (Kevin Wallace, 2012). The most coming logical topologies are Bus, Ring, and Star (Kevin Wallace, 2012).

This report fulfills the specific requirement for documentation as specified in FIT 5083 Assignment 1. In this technical report, we will identify the various steps and techniques used in deployment of wireless network. Initially, what is networking or network infrastructure? Networking mean to connect two or more devices and configure them in such a way that they can communicate with each other. In networking, network infrastructure means to connect the software and hardware part rather than actual connection between two devices. Now days, wireless network connections are highly on demand because it’s easy to access and it does not require any cabling structure.

It is the most cost effective strategy for "cash-strapped" businesses with no special emphasis on security. Sometimes the cheapest design doesn't always translate into the easiest design. In this case, the translation is a success. The hub will serve as the intermediary between the computers and the internet (via cable modem). Also, in this case, easy design also translate into easy troubleshooting of any network problem. The star network allows troubleshooters to isolate issues on the network instead of taking the entire local network offline. Moreover, the star network implies direct data flow from the computers (via hub) to the internet instead of the data flowing through the nodes first. Hence, speed is a benefit of such a network. In addition, because of the direct data flow methodology (nodes-to-hub-to-modem-to-internet-and-vice-versa), the data is safe. Finally, the star network allows for expansion of nodes, hubs, and gateways without losing any of the networks advantages listed on this page. The owner plans to eventually add 7 more computers to the network. My recommendation is to purchase an additional hub to manage the 7 additional computers. Also, an additional modem is needed for load balancing purposes.

Each sensor nodes have a key table in their RAM, during bootup process each node perform a self test to recognize their neighbours.if there is empty key table then sensor nodes starts the process of mutual authentication by broadcasting the signal to their neighbor, if the process of self authentication fails then each sensor node sends the signal to cluster head to provide the required keys in their key table.. Each entry in the key table is linked to routing table to recognize their cluster head to route the sensed data.