2.0 NETWORK TOPOLOGY
2.1 NETWORK WITHIN A BULDING
A new three level building will be built to accommodate three computer labs for Faculty of Computer Science and Information Technology. It will be a separate building from the existing one. Each level will accommodate one lab. 50 personal computers (PCs) and a shared printer will be located in each lab. All three labs will be linked to each other and also to a server room located at the second level of building. Additionally, each lab will be equipped with wireless access points. Figure 2.11 A hybrid topology: a star backbone with two bus networks in a single computer lab Figure 2.11 above shows the network topology in a single lab. In the lab, a star topology is used to connect a printer,
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It can be used to support public Internet hotspots whereby can be connected by mobile devices such as smartphone, laptop and tablet. Most of the wireless routers claim to support up to 255 connected devices. It is theoretically possible by connecting 225 mobile devices to a single Wi-Fi access point in the same time, but it is not recommended. By connecting such a huge amount of devices into the same hotspot, the performance within the network will be very poor. Instead, install multiple access points to distribute the network load and to cover the “dead spots” in the lab. Hence, any number of devices can be supported effectively. That is why each lab is equipped with a wireless access point instead of installing only single access point in the entire building as shown in the Figure …show more content…
There are some requirements to connect the network in the new building to the Internet. First, Internet Service Provider (ISP) is needed as it provides Internet services. It allows user to access the Internet from a PC in the lab. Also, ISP is the link between the computers and all other servers or services which available on the Internet. For example, electronic mail or email, web hosting and access to software tools. Second, equipped with a modulator-demodulator or in short form, modem, is part of Internet services which use more advance techniques to achieve higher network speed. User can log on to the Internet and browse the World Wide Web for sending or receiving email purposes. However, user might expose to various types of computer security risks. For example, hacker, virus, information theft, unauthorized access and use. Hence, firewall is needed. Firewall is a software that runs on computer, which inspects network traffic passing through it, and denies or permits passage based on a protocol or a set of rules. Firewall is designed to block unauthorized internet user from accessing private networks connected to the
The Jaagz’ local area network will use category 5 cable and run IEEE 802.3 protocol. Using IEEE 802.3, the network speed will average about 10 Mbps. It will utilize a combination of a star and bus topology, which is the most common topology used in networks. The bus topology makes up the backbone of the network while the star topology branches out.
“The Spanning Tree Protocol (STP) is an older network protocol that ensures a loop-free topology for any bridged Ethernet local area network. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them.”
Disclaimer; this is intended to be an introductory technical article; certain details have been excluded in the interests of space and clarity. Network design examples are presented to illustrate specific technical points and are not intended to fully complete.
Laid out in a line – Has a single cable connecting all of nodes. If one node breaks down the whole network breaks down
The Open Systems Interconnection model breaks down host-to-host transmissions into seven different layers where each one performs a specific function. At the same time each layer has the ability to also communicate with adjacent layers in either direction. In essence each layer interacts directly with the layer below it and at the same time also provides support to the layer above it.
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.
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.
Building a star topology is much more expensive and time consuming than the bus network. The increased costs come in the form of cabling and the central device(s). However, star topologies can be easily expanded to accommodate more nodes and troubleshooting is much easier because connectivity problems are simpler to isolate than a bus network.
Timothy Pintello (2013). Introduction to Networking with Network1. USA: John Wiley & Sons, Inc. 175-199.
Institute, C. L. (2005). Switching and Routing. In R. H. Ivy, Networking + Fundamentals and Certification (pp. 192-193). Upper Saddle River, NJ: Prentice Hall.
Despite its simplicity and reliability the bus network does have several limitations. The cable length of the bus is limited due to data loss. Also, a bus network may have performance issues if the nodes are located a...
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
The next network topology is the Bus topology. Bus topologies consist normally of one backbone or one transport media that all of the nodes are connected to. The linear bus configuration has only two end points and any information being transmitted through the network is received by all of the nodes simultaneously. Although networks based on a bus topology are relatively inexpensive to set up, they do not scale well. When you try to add mor...
Different devices which are interconnected with each other and communicate with each other, form an internet.
The packet-filtering firewall will keep out unauthorized data from entering the network and reduce the number of ports that are accessible by the users and outside threats.