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esay about network topology
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Network Topologies Analysis and Comparison
The bus topology connects several computers, or nodes, with a communication channel, often a single cable. Computers on a bus either transmit data to other computers on the network or listen for data from other computers on the network. They are not responsible for moving data from one computer to the next. Consequently, if one computer fails, it does not affect the rest of the network. Because the data, or electronic signal, is sent to the entire network, it travels from one end of the cable to the other. If the signal is allowed to continue uninterrupted, it will keep bouncing back and forth along the cable and prevent other computers from sending signals. Therefore, the signal must be stopped after it has had a chance to reach the proper destination address. To stop the signal from bouncing, a component called a terminator is placed at each end of the cable to absorb free signals. Absorbing the signal clears the cable so that other computers can send data. Both ends of the network must be terminated with a terminator. A barrel connector can be used to extend the cables for better reach. A barrel connector can connect two pieces of cable together to make a longer piece of cable which can be helpful in many office situations. However, connectors weaken the signal and should be used sparingly. One continuous cable is preferable to connecting several smaller ones with connectors. Using too many connectors can prevent the signal from being correctly received. There are ways around that. Another handy piece of equipment is known as a repeater, a repeater can be used to connect two cables together. A repeater actually boosts the signal before it sends the signal on its way. A repeater is...
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... central node connected to each of the other nodes, usually a smaller computer or terminals, by a single, point to point link. All communications between network devices must pass through the central node. Thus, the central node intervenes to deliver messages to a specified destination. Some pros and cons to the Star Topography would be:
1. Failure of the central node shuts down the entire network.
2 The star network offers the advantage of centralized resources and management.
3 If one computer or the cable that connects it to the hub fails on a star network, only the failed computer will not be able to send or receive network data, thus not affecting the rest of the network.
4. Each computer is connected to a central point, this topology requires a great deal of cable in a large network installation and could cost a great deal of time and money for installation.
“Network topology is the arrangement of the various network elements such as node, link, of computer network. Basically, it is topological structure of a network which ether be physically or logically.”
...a flood of packets. Therefore, the victim node or sometimes the whole network can get easily paralyzed [24].
MAC Layer Connections: Management connections and data transport connections are two connections in this layer. The management connections have three types: basic, primary, and secondary. A basic connection and primary connection are created for each MS when they join the network. A basic connection is used for short and urgent management message. And a primary connection is used for delay-tolerant management messages. The secondary connection is used for IP summarized management messages such as dynamic host configuration protocol [DHCP], and simple network management protocol [SNMP]. Transport connections can be provisioned or can be recognized on demand. They are used for user traffic flows. Unicast or multicast can be used for transmission.
Meanwhile, these massive files quickly began monopolizing the services of the central location network switch. Since the network was physically redundant throughout, the network components tried to calculate new paths along which the data could flow; but eventually became confused. Therefore, the redundant components intended to operate in tandem became primary and began to duplicate each other’s functions, resulting in an endless loop until the network was totally disabled. On the afternoon of November 13, 2002, every software application that required network communication abruptly stopped
All computers are connected to a hub, switch or router. Require more cabling, but failure of one node does not break down the network.
In order to have a greater understanding of the terminology and descriptions offered in this paper, we must first understand what a network switch is. A brief definition of a network switch is a computer networking device that connects network segments. It uses the logic of a Network bridge, but allows a physical and logical star topology. It is often used to replace network hubs. A switch is also often referred to as an intelligent hub.
Network topologies have some advantages and some disadvantages as well. This essay discusses the main advantages and disadvantages of three of these main topology technologies, to mention, the ring, the bus, and the star, showing the associated wiring types for each one of these topologies.
Troubleshooting media problems on a bus networks can be very tedious, since a break in the backbone will bring down the entire LAN. For this reason, bus topology is not considered one of the more robust network topologies, compared with star or mesh. A loose or missing terminating resistor can also bring down a LAN.
The idea of distributing resources within a computer network is not new. This first started with the use of data entry terminals on mainframe computers, then moved into minicomputers and it is now possible in personal computers and client-server architecture.
...cost of a single node must be as low as possible as large numbers of nodes are deployed in a single network.
Bus topology refers to a local area network (LAN) arrangement where each node or device is connected to a main cable or link called a bus. A bus network is simple yet very reliable. Since nodes themselves are not relied upon for communication, the failure of a single node is not problematic for the rest of the network. For a major issue to occur, there must be a problem with the bus itself.
Star topology is one of the most commonly use network topologies in the market. With the foundation in the switching system of the telephone, it is also known as the most ancient data exchange design method. Each of the nodes connected to the central conduit directly to do the dat...
...ses are to provide a mechanism to connect Personal Computers (PC) to each other for day-to-day operations and ad hoc testing, and transfer data from lab to lab at high speed. Each lab is connected to every other lab via 1Gbps Ethernet links running over Category 6 cables. This network is not part of the DISN-LES. System Administrators (SA) can reconfigure computers and network connectivity to suit mission requirements.
Wired and wireless transmission media are pathways that are used to transport data or information through the use of various means. While wired media utilizes cables or wires to transport data, wireless media transmit data through radio signals or waves and do not require any cables. As a result, these systems have certain advantages and disadvantages that make them effective and ineffective for various purposes. The other important aspect of transmission of data is structured wiring systems that are fast becoming the norm for all networks. These systems are widely used because of their benefits i.e. consistency, simplified troubleshooting, support for future applications, and support for multi-vendor equipment. Consequently, organizations will benefit from sites that provide information regarding structured wiring protocol.