Survey of Wireless Computing

Wireless LANs provide all the functionality of wired LANs, without the physical constraints or the wired connection itself. Wireless LAN configurations range from simple peer-to-peer topologies to complex networks offering distribution data connectivity and roaming. Besides offering end-user mobility within a networked environment, wireless LANs enable portable networks, allowing LANs to move with the knowledge workers that use them. One of the aims of the project is to illustrate suitability of a wireless LAN for the in use today. This will allow us to gain a more fundamental insight in the possibilities and restrictions of wireless LAN.

3-Using WEP(wired equivalent privacy), ensure that the wireless connection can be made secure. 4.-Test signal strengths at different levels of bandwidth and distances. Overall, this project was fairly simple. All we really had to do, was to test the signal strengths and resolve security and connectivity issues. Wi-Fi Facts- Wi-Fi is an 802.11 IEEE standard.

Introduction The range of wireless networking technologies is extended to cover voice networks and general data, which allows users to transmit different types of data through wireless connections over long distances, besides covering the techniques of infrared light and radio frequency optimal for short-range wireless communications. And with the popularity of laptops, hand phones, handheld computers, PDAs (PDA), pen-based computer, GPS devices, and post-pc era. Intelligent electronics devices that depend on wireless networking technologies have become cheaper, more distributed, more widespread in daily life, For example, users can use their hand phone to access their e-mail. As for travelers to use laptops and connect to the Internet through base stations installed at airports, railway stations, and other public places. Even In the home, users can connect devices to synchronization data and file transfer.

So, it is important to secure the wireless network by utilizing small time to be saved in future. The security of wireless networks becomes more vital because it is most commonly used in every field. There are number of practices developed for securing wireless networks till now and because of the scope, and its importance, more research is being done for more secure wireless networks in future ( Solms, BV & Marais, E 2004). Wireless Network Security 1. Wireless Networking Basics According to (Vacca, JR 2006) The term wireless networking means the technology that facilitates two or more computers to communicate using standard network protocols, but without network cabling.

If there is an error, then the sender will not hear an ack within the timeout interval and can retransmit. Issues with End-to-end schemes The major issue in this scheme is that the paper assumes perfect knowledge about wireless losses to generate explicit loss notification(ELN information). This information is then propagated to the TCP sender which takes corrective action based on the type of error. In a real world implementation, it is impossible to accurately identify packets lost due to errors on a lossy network. This is mostly because the only other entity between the source and the ... ... middle of paper ... ...acket.

It becomes more desirable to mobile users (MU) to access these services wirelessly while they are o... ... middle of paper ... ...munications Magazine, vol. 43, pp. S29-S36, 2005. [6] Y. Matsunaga, A. Merino, T. Suzuki, and R. Katz, "Secure authentication system for public WLAN roaming," 2003, pp. 113-121.

The world has gone through a lot of changed as time passes by. With advancements in the technological field people are can communicate with ones from around the world without having to even lift a finger. To make things more efficient and more cost saving industries have made technology wireless. Wireless technology gives people the chance to get up from their stationary computer, or cord phone and able to freely move without restrictions. The IT, or Information Technology has become a standard and very critical part of today’s society.

There are two different methods for wireless communication, Frequency Hopping (FH) and Direct Sequence Spread Spectrum (DSSS or DS). It is important to check which of these two methods are being used because they can not work together. The latest version of the IEEE 802.11 standard is 11 mbps and 5.5 mbps (mega bits per second), with support for the older standard of one mbps and two mbps speeds. This new standard only covers Direct Sequence Spread Spectrum, not Frequency Hopping types. It is expected that the price of wireless networking interface cards to become inexpensive like the Ethernet cards.

The following are critical security questions: •     What challenges are faced with wireless security? •     How can you verify that the device being used is actually in the hands of an authorized user? How can you enhance the security of the device? •     How secure is the over-the-air network between the organization and the wireless device? •     How can you secure the wireless session?

Another interesting challenge is monitoring "hidden node" IBSS stations where the last wireless station to generate a beacon is responsible to reply to probe requests (ANSI/IEEE, 126). In these cases, the wireless LAN agent may not be within the coverage area necessary to collect responses or further solicitation of management information from the responding “hidden node” station. 2. Identifying anomalous trafic In order for wireless clients to locate a network to join, the IEEE 802.11 specification made an accommodation for clients to broadcast requests for available networks.