...4 Review: LAN Topologies The purpose of this activity is to reinforce what you have learned so far about local area networks technologies. What are the two methods that Carrier Sense Multiple Access (CSMA) employs to handle messages that are sent simultaneously? (Min. word count: 15) Carrier sense multiple access methods are detection where a transmission is cancel when collision is detected and avoidance where transmission is delayed. Which topology would you use when unable to install network cable? (Min. word count: 15) Mesh topology because is provides has separate cables for each connection, meaning a cable can break without interfering with the rest of the network. What is inherent in mesh topologies that enable them to provide high reliability? (Min. word count: 20) Mesh topology provides fault tolerance by having separate cables for each connection, allowing any one cable to break without interfering with the rest of the network. What are advantages of star topologies? (Min. word count: 10) Star topology gives great fault tolerance as any device/cable failure will not affect the rest of the network. Compare the two modes supported by wireless topologies. (Min. word count: 20) In ad-hoc mode data in the network is transferred to and from wireless network adapters connected to PCs. An infrastructure network enables you to Connect to a wired network. In this section, consider each description (A through G). Which topology does it describe...
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...basic understanding of ERP. When they research on the Internet, students should be able to find more material they can use in their recommendations. For reference purposes, the following screens are provided: [pic] [pic] 2. Visit SCR’s data library to review SCR’s network configuration and then send Jesse a recommendation for the TIMS system architecture. She wants me to suggest an overall client/server design, number of tiers, and network topology. She also asked me to comment on these issues: legacy data, Web-centricity, scalability, security, and batch processing that might be needed. Jesse said it was OK to make reasonable assumptions in my proposal to her. Student answers will vary. Students should start by viewing the SCR network shown in the Data Library. Based on information in this chapter and previous SCR assignments, students should be able to form an opinion regarding SCR’s TIMS system. Most students will conclude that a client/server architecture should be used, and that a two-tier design probably would support SCR’s needs. With regard to network topology, not enough information is provided to form a definite conclusion. The main objective is to have students understand topology characteristics generally and accurately describe whatever...
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...Network Design Project Rosemarie Moore Professor Melanie Howard Introduction to Networking CIS175 June 1, 2010 Network Design Consultation Initially, I was asked to set up a network design within the client’s budget. After sitting down with the client to discuss the needs of his/her business I asked, “What specifications did he or she have if any”? I was told that they wanted two (2) workstations set-up, quality printer, internet access, multiple email addresses. Basic low security environment and their initial investment was $5,000 dollars or less and wanted their cost be less than $200.00 dollars a month. Research I began my research by checking out the top internet carriers that serviced the area. I found two internet carriers in the area. There was Verizon who has DSL or FIOS and Comcast that handled Cable internet services. I chose Comcast Business Class for the internet provider. I chose to use is a Linksys ultra range wireless router. The printer, I chose is a HP Officejet 6500 with wireless capabilities and billing software I chose is Quickbook Pro 2010 (http://quickbooks.intuit.com/pro/features/ ). I chose the star topology because the client is only going to have 2 workstations. Many home networks use the star topology. A star network features a central connection point called a "hub" that may be a hub, switch or router. Devices typically connect to the hub with Unshielded Twisted Pair (UTP) Ethernet. Compared...
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...Jennifer Otten Mohammad Kazmi NTC/361 May 21, 2012 Bus Topology In networking the bus topology is that one computer at a time can send information. This affects the performance of the network. There are limited amounts of computers attached to this network. All users share the amount of transmission time. For each computer that is sending data the longer some computers wait to send their data (Tomosho, Tittel, & Johnson, 2004). The bus topology is a passive topology, which means that it is listening to the data being sent but is not participating in network communications. The advantages of possessing a bus network is that is a quick, inexpensive network to set-up and easy to implement. The disadvantages are the amount of computers that attached to the network and the amount of data that flows through them causes the network to be slow. Another disadvantage is if something happens to one part of the network the whole network fails. Ring Topology The ring topology is each computer is connected directly to the next computer in line, making a circle effect with the cables. If one computer receives a signal it either acts on it or it passes it to the next computer. The signal travels only in one direction (Tomosho, Tittel, & Johnson, 2004). Termination is not necessary since it is a circle with no end. Some advantages of a ring topology are the computers have equal access to the entire network. The ring network has a very steady performance, even though it has many users...
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...Assignment 1. Network Topology Paper Hierarchical layout defines how the network topology is structured physically and logically. In physical topology all devices and components are placed in various locations depending on the layout. Logical topology is the flow of data throughout the layout. There are many variations of network topologies that can be implemented. The most common network topologies are star, bus, and ring. Star topology is setup with each host connected to a central hub with a point to point connection. All workstation and other devices are connected to the central hub or switch. That switch is the server and all devices connected to it are clients. All resources must be connected to a central device in order for it to be a star topology. Data that travels in the network passes through the central hub and causes it to act as a signal repeater. The advantages of a star topology are that it is easy to design and versatile in planting additional nodes. The major disadvantage of the star topology is that the hub becomes the single point of failure. Bus topology utilizes a single bus cable to connect each computer and the data from the source travels in both directions to all devices on the bus cable until it finds the specific client. Data is only accepted if the addresses matched up and if it doesn’t match, it’s simply ignored. The last computer connected to the bus needs to be terminated to prevent echoes in the network. Having a single line for bus topology makes...
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...Assignment 1. Network Topology Paper In: Computers and Technology Hierarchical layout defines how the network topology is structured physically and logically. In physical topology all devices and components are placed in various locations depending on the layout. Logical topology is the flow of data throughout the layout. There are many variations of network topologies that can be implemented. The most common network topologies are star, bus, and ring. Star topology is setup with each host connected to a central hub with a point to point connection. All workstation and other devices are connected to the central hub or switch. That switch is the server and all devices connected to it are clients. All resources must be connected to a central device in order for it to be a star topology. Data that travels in the network passes through the central hub and causes it to act as a signal repeater. The advantages of a star topology are that it is easy to design and versatile in planting additional nodes. The major disadvantage of the star topology is that the hub becomes the single point of failure. Bus topology utilizes a single bus cable to connect each computer and the data from the source travels in both directions to all devices on the bus cable until it finds the specific client. Data is only accepted if the addresses matched up and if it doesn’t match, it’s simply ignored. The last computer connected to the bus needs to be terminated to prevent echoes in the network. Having a single...
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...Checkpoint: Network Consultant Scenarios Complete Case Projects 3-1, 3-2, & 3-3 of Guide to Networking Essentials. After determining if a client-based or client/server model will be used, substantively justify your choice in 200 to 300 words. Case Project 3-1 The changes in equipment that are required to bring this company’s network up to date to solve the shared bandwidth problem is replacing the hubs with fast ethernet switches and a router. You could make subnets for each department of the company, creating different collision domains which would eliminate dropped packets. The throughput would be increased based upon the upgraded switch/router. Also Setup a file server to store the large files. I would the issue of this problem by using a mesh topology and run over 300Ft of Cat 5 cable to a single point. You could also run the cable through metal conduits along walls or on the floor or you could always implement a wireless system to solve the ceiling issue. Case Project 3-2 The topology that should be used in this network is an extended star topology because it is a bit more advanced than the regular star topology. Instead of connecting all devices to a central unit, sub-central devices are added in. This allows more functionality for organization. The Extended Star Topology is all but necessary to prevent degraded signals and it is also better for bigger networks. Also the network would be server based because connection will be coming from one central point...
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...CONCEPT OF NETWORK: A network can be defined as a group of computers and other devices connected in some way so as to be able to exchange data. In a network of computers, people can share files and peripherals such as modems, printers etc. Each of the devices on the network can be thought of as a node (hub),each node has a unique address. In modern networking, data is transferred using packet switching. Messages are broken in to packets and sent from one computer to another. At the destination, data is extracted from packets and used to reconstruct the original message. TYPES OF NETWORK: Broadly there are two types of network: Local Area Network (LAN) – It confined to a particular geographic area such as a building or a college campus. Wide Area Network (WAN) – It covers cities, countries and continents. NETWORK TOPOLOGY: A topology describes the configuration of a communication network. The way in which the elements of a network are mapped or arranged is known as a network topology. A topology describes the physical and the logical interconnection between the different nodes of a network. Types of Network Topologies 1) Star Topology Adarsh S Kawale PRN: 12020941011 In this type of network topology, each node of the network is connected to a central node, which is known as a hub. The data that is transmitted between the network nodes passes across the central hub. Advantages – Suited to larger networks, easy to expand the network, easy to troubleshoot problems...
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...LAN Topologies LAN Topologies Ashley Jones University of Phoenix Case Project 2-1 This Case Project explains a network comprised of 50 computers that are connected to 10 Mbps hubs. It goes on to explain the collisions that are occurring when multiple stations send data simultaneously. This description indicates the network is using a logical bus topology because of the 10 Mbps hubs it utilizes. In addition, they are experiencing collisions; in a logical bus topology, data transmitted on the network is viewable by other nodes. The physical topology of this network seems to be an extended star. Since a multiport repeater/hub can have up to 24 ports, they can lay this network out in many different ways. If there is enough office space, they could set up 5 different offices of 10 stations. Each set of 10 would be connected to one 10 Mbps hub and form a physical star. Each of these hubs can be connected to a central hub that is used to extend the network. Case Project 2-2 This Case Project advises of a network that has 200 workstations and four servers connected by multiple switches. The network incorporates a physical star topology because all of its devices come together at a central location. More specifically, this exended star topology allows about 20 workstations to connect to one switch. This setup is repeated multiple times, all with 20 workstations connected. Another switch sits in the “center” of this setup and attaches to one of the switch ports...
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...AERONAUTICAL MOBILE AD HOC NETWORKS CONTENTS 1: Introduction 2: Literature Survey 3: References PROBLEM STATEMENT 1.1 Ad-hoc network "Ad Hoc" is actually a Latin phrase that means "for this purpose." It is often used to describe solutions that are developed on-the-fly for a specific purpose. In computer networking, an ad hoc network refers to a network connection established for a single session and does not require a router or a wireless base station. An ad hoc network is a temporary network connection created for a specific purpose (such as transferring data from one computer to another) 1.2 Mobile ad hoc network(MANET) A MANET is an autonomous collection of mobile users that communicate over relatively bandwidth constrained wireless links. Since the nodes are mobile, the network topology may change rapidly and unpredictably over time. The network is decentralized, where all network activity including discovering the topology and delivering messages must be executed by the node themselves, i.e., routing functionality will be incorporated into mobile nodes. In other words, MANET is a type of ad hoc network that can change locations and configure itself on the fly. Because MANETS are mobile, they use wireless connections to connect to various networks. This can be a standard Wi-Fi connection, or another medium, such as a cellular or satellite transmission. Literature Survey 2.2 Analysis of research Paper TITLE OF PAPER | AUTHORS | YEAR...
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...Integrative Network Design Project: Part 1 Michael Thibodeaux Instructor Matt Henwood 10/27/2012 Introduction The virtual organization I choose was Kudler Fine Foods, mainly for my experience with this organization in previous classes. Upon research I found that Kudler is in serious need of updated networks as their current systems are border line obsolete and extremely inefficient. Over the next few weeks a plan will be formulated to be put into action to remedy this. This being part 1 I will discuss the general outline to this plan as well as evaluate Kudler’s current system and setup. I will also note the makeup and design of their network system and state which standards apply to this project. Kudler is an upper-scale grocer which specializes in selling quality specialty foods as well as your more common items found in groceries. They currently have three locations around the San Diego area which are located in Encinitas, Del Mar and La Jolla. Currently, each location hosts its own network but share similar characteristics. Characteristics and Components Kudler’s network is built on a 10.1.50.0 Ethernet network with a Novel 4.11 server for their point of sale systems. Their network hosts many computers, all of which run windows98 as their operating system. Each of the computers hosted in this network boasts a 56k modem and is only capable of 56k speeds to access out of company networks and information. This type of modem is very limiting as it requires an...
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...Network Mechanisms This paper will define and describe the differences in mechanisms that make up a network system. It will include topologies and connection mediums, as well as the advantages and disadvantages associated with these network mechanisms. Topologies and connection mediums that will be addressed are the following: Topologies: • Mesh • Bus • Ring • Star Connection Mediums: • Ethernet • Token Ring • FIDDI • Wireless Mesh Topology A mesh topology consists of two types, full mesh and partial mesh. Full mesh topology interconnects all systems to each other. This allows for redundancy if one connection is severed. With partial mesh topology only some workstations are interconnected to other computer systems while; others are only connected with systems that an exchange of data occurs (Mitchell, 2011). The advantages and disadvantages of a mesh topology are: Advantages: Disadvantages: Provides redundant paths between systems Time and material to implement The network can be expanded without disruption to current users. Cost to implement (many connections) Dedicated links for transmitting data Complicated implementation Bus Topology A bus topology uses a common backbone that directly connects each system. The backbone consists of a single cable that all transmissions are sent across by the systems that are attached (Mitchell, 2011). The advantages and disadvantages of a bus topology are: Advantages: Disadvantages: Easy to implement...
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...the important network topologies for commercial building. (a)What is the most typical implementation of the hierarchical star, that is, the specific location of the horizontal cross connection and the workgroup switches? ANS: They can be placed in the telecommunication room on each floor of the building (b)What is the process of locating the locating the network element closer to the equipment room is call and what are the benefits? ANS: This process is called FTTE (fiber to the telecommunication enclosure) and the benefits involved saving up to 25% or more through better port utilization and lower building costs of telecommunication rooms. (c) By installing all network equipment in a central location, what is the implementation of the hierarchical star topology called and what are the pros and cons? ANS: It is called FTTD (fiber to the desk) or centralized cabling and the good side of it is that it provides the greatest port utilization and reduces the size and load of the telecommunication room. At the opposite end, it is more expensive to use media converters or optical NICs (2) With the understanding of the different between UTP and Optical Fiber cabling and their places, with the many types of UTP and Fiber Cable: (a) What is the preferred UTP cabling media used to support 10Gbps network speed? ANS: Category 6A cabling (b) What is the preferring optical fiber cabling media used to support a low-cost transmission at 10Gbps network speed? ANS: 850nm...
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...Network Consultant Scenarios Joshua Lillis IT/240 July 20th, 2014 Network Consultant Scenarios * What changes in equipment are required to bring this company’s network up to date to solve the shared-bandwidth problem? Since the office has 10 workstations connected to a 10 Mbps hub, each computer average bandwidth is 1 Mbps. Since the LAN is relatively small, you can change it to a 100 MB switch. Even if their NICs are only 10 MB, they can upgrade their NICs as need be. Since seem to transfer large files often, so this will allow for the transfers to go smoothly and not bog down the network. Effectively the transfer rate is 200 Mbps depending on what their NICs are capable of. * What topology and which type of device can be used in the manufacturing area to solve the cabling difficulties? The type of topology that would be used is an extended star network, since it will be connected to the office, which uses a star network topology. The device that would be used to overcome the cabling difficulties would be a Wireless Access Point, using a wireless router. We would need to buy Wireless NICs for each of the computers in the manufacturing areas. In case 3-1 the type of network it would be, is a client based model. It is a client based model since there is no centralized server. Old-Tech’s computers transfer large amounts of files to each other on the network. Since any of the users can share their resources on their computer, each person needs determine...
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...Unit 1 Exercise 1 An analog signal is any continuous signal which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal. A digital signal is a physical signal that is a representation of a sequence of discrete values (a quantified discrete-time signal), for example of an arbitrary bit stream, or of a digitized (sampled and analog-to-digital converted) analog signal. Half-duplex data transmission means that data can be transmitted in both directions on a signal carrier, but not at the same time. Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring Long-distance telephone company, such as MCI (before its absorption by Verizon), Sprint and the former AT&T Corporation (before its merger with SBC in 2005). In the United States, it is defined as any carrier that provides inter-LATA communication, where a LATA is a local access and transport area. Long Distance central office, central office (CO) is an office in a locality to which subscriber home and business lines are connected on what is called a local loop. Tandem, telephone switch is a U.S. telephone company central office telephone exchange used to interconnect local exchange carrier...
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