INTRODUCTION Wireless LAN is an option to the network cables you might be using to connect your computers at home or the office. Several variants are out there like HomeRF, various so called IEEE 802.11 (Institute of Electrical and Electronic Engineers) standards, LAN(Local Area Network) over DECT, Bluetooth, etc.If have to buy a wireless LAN right now, go for one of the 802.11b (cheap, but less secure) or 802.11g (bit more expensive, but faster and more secure) variants. Wireless LAN is sometimes referred to as WiFi, however, WiFi is in even a certification by WECA. It "guarantees" that devices are up to standard. Data transfer speeds vary from 1 Mbps (Bluetooth) up to 54 Mbps (802.11g and 802.11a). For normal Internet use, 1 Mbps should be sufficient. For copying larger files between two PC's and/or a server requires a bit more (depends on your patience). For multimedia purposes (streaming video), 11 Mbps should be OK. Keep in mind though, that most WiFi solutions, only reach half of their "claimed" speeds! PROBLEM STATEMENT Problem statement Overview As with wired LAN systems; the actual throughput in WLAN is product and set-up dependent. The factors affecting throughput include the number of users, diffusion factors such as distance and multipath, the type of WLAN system employed, as well as the hibernate and bottlenecks on wireless portions of the LAN. Throughput is to be defined as the ratio of the expected delivered data payload to the expected transmission time. It is the percentage of not to be diverted data packets received without errors. Moreover, most voice and video applications prefer very small payload sizes to ensure reliable and minimum delay service delivery. Throughput is what the user... ... middle of paper ... ... status become finished. As you can see, there are difference results in Mbps column from both sides. It because the both side has a different speed for Bits per second. You also can save the result by click on print button to refer for next time. CONCLUSION The conclusions to derive from this report on speed testing are that: Precision is only as good as the testing application’s ability to provide the details that validate the test results. Not all speed testers are common and should not be compared unless the differences in their methodology are taken into consideration. The results from a speed tester should proclaim the method used to conduct the test, otherwise the results are meaningless. The test method must coordinate to the application profile for the results to be of value when assessing the performance expectation of that application.
Develop a test strategy for testing the entire application chosen in unit 3 for analysis and design. Keep in mind that testing that involves users should minimize their time commitment while obtaining essential information from their involvement. Specifically define roles, responsibilities, timing, and test strategy for each level of testing.
There multiple LAN standards because there might be wide range of data rate and transmission that might need to support. For that reason there are a set of standard that are developed by IEEE 802 committee which are accepted and used by most of the product in the market today. Some may use the standard for Token ring, Ethernet and Wireless.
Wireless networks – While the term wireless network may technically be used to refer to any type of network that is wireless, the term is most commonly used to refer to a telecommunications network whose interconnection between nodes is implemented without the use of wires, such as a computer network. Wireless telecommunication networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves, such as radio waves, for the carrier and this implementation usually takes place at the physical level or “layer” network.
its nature it has raised the question "Are we really built for speed?" It seems
J. A. Gutierrez ,M. Naeve , E. Callaway , M. Bourgeois ,V. Mitter and B. Heile "IEEE 802.15.4:adeveloping standard for low-power low-cost wireless personal area networks", IEEE Network, vol. 15, no. 5, pp.12 -19 2001
To make sure it is a fair test; the procedure is repeated a couple of
The propose research will address a problem confronting many two year institutions in the present-day (i.e. how to best plan, design, and implement WLAN technologies). While WLAN technologies offer the benefits of mobility, reduced installation time, and decreased cost, many challenges must be met by institutions deploying them (Geier, 2005). These issues are related to security, speed, interoperability, and equipment selection, ease of use, reliability, signal interference, installation, and health risks.
.... Without knowledge of the reliability and validity of these two instruments we are unable to know if the instruments are consistent or if they measure what they intend to measure.
When test results don’t have accuracy, additional testing may be needed to authenticate the results.
People would choose the faster one and this
Wireless technology has come from the basics of cellular usage to sensors in the medical field. Wires are now a thing of the past in today’s world with technology forever revitalizing. Wi-Fi (Wireless Network) or 802.11 networking is a phenomenal way of providing wireless Internet at a low cost. Using radio waves, a wireless network connects a PC, mobile phone or just about anything that connects to the internet wirelessly via a router.
It is really important and necessary that the performance is measured at all levels. The performance is usually divided into five parts in order to be measured in a simpler and more accurate way:
LANs systems can be defined and connected in many different ways. This is the reason for the standardization for every one can have a common ground to start from. “The LANs described Herein are distinguished from other types of data networks in that they are optimized for a moderate size geographic area such as a single office building, warehouse, or a campus. The IEEE 802 LAN is a shared medium peer-to-peer communications network that broadcasts information for all stations to receive. As a consequence, it does not inherently provide privacy. The LAN enables stations to communicate directly using a common physical medium on a point-to-point basis without any intermediate switching node being required. There is always need for an access sublayer in order to arbitrate to access to the shared medium. The network is generally owned, used, and operated by a single organization. This is in contrast to Wide Area Networks (WANs) that interconnect communication facilities in different parts of a country or are used as a public utility. These LANs are also different from networks, such as backplane buses, that are optimized for the interconnection of devices on a desk top or components within a single piece of equipment.”(IEEE 802 Standard 1990) That is the standard definition for LANs by Institute of Electrical and Electronics Engineer committee 802. They are the committee used to set the standard in workmanship and operations for technicians that set-up and perform maintenance on LANs systems. And through all the technical words what they are trying to say is a LAN is a small area network that distributes information among computer in a small work environment unlike WANs that distribute information across global areas.
Wireless is everywhere today whether at home working from your WIFI network to work where you might be linked a wireless network or even through your phone through a 3G or 4G network to connecting to an open wireless networks. As you can see for the most part people are connecting to wireless from the moment they leave their home till they get to work and then back. While wireless comm...
Software development follows a specific life cycle that starts with designing a solution to a problem and implementing it. Software testing is part of this software life cycle that involves verifying if each unit implemented meets the specifications of the design. Even with careful testing of hundreds or thousands of variables and code statements, users of software find bugs. “Software testing is arguably the least understood part of the development process” and is also a “time-consuming process that requires technical sophistication and proper planning” (Whittaker 71) It is important to comprehend this concept by understanding the different characteristics and aspects of software testing, and then to examine the techniques, procedures and tools used to apply this concept. This will enable the user to realize the problems faced by software testers and the importance of software testing.