Ibrahim Al–Shourbaji

Ibrahim AlShourbaji, Samaher Al-Janabi, Ahmed Patel

Distributed Search Engine Architecture (DSEA) hosts numerous independent topic-specific search engines and selects a subset of the databases to search within the architecture. The objective of this approach is to reduce the amount of space needed to perform a search by querying only a subset of the total data available. In order to manipulate data across many databases, it is most efficient to identify a smaller subset of databases that would be most likely to return the data of specific interest that can then be examined in greater detail. The selection index has been most commonly used as a method for choosing the most applicable databases as it captures broad information about each database and its indexed documents. Employing this type of database allows the researcher to find information more quickly, not only with less cost, but it also minimizes the potential for biases. This paper investigates the effectiveness of different databases selected within the framework and scope of the distributed search engine architecture. The purpose of the study is to improve the quality of distributed information retrieval.

Ibrahim AlShourbaji

Wireless Communication is an application of science and technology that has come to be vital for modern existence. From the early radio and telephone to current devices such as mobile phones and laptops, accessing the global network has become the most essential and indispensable part of our lifestyle. Wireless communication is an ever developing field, and the future holds many possibilities in this area. One expectation for the future in this field is that, the devices can be developed to support communication with higher data rates and more security. Research in this area suggests that a dominant means of supporting such communication capabilities will be through the use of Wireless LANs. As the deployment of Wireless LAN increases well around the globe, it is increasingly important for us to understand different technologies and to select the most appropriate one. This paper provides a detailed study of the available wireless LAN technologies and the concerned issues, will give a brief description of what wireless LANs are, the need of Wireless LAN, History of wireless LAN, advantages of Wireless Networks, with summarizing the related work on WLAN in academic area, Wireless LAN technologies, some risks attacks against wireless technologies, suggesting some recommendations to protect wireless LAN network from attack, Finally we propose some research issues should be focused on in the future.

Ibrahim Al Shourbaji, Rafat AlAmeer

The rapid proliferation of wireless networks and mobile computing applications has changed the landscape of network security,the wireless networks have changed the way business, organizations work and offered a new range of possibilities and flexibilities; It is clear that wireless solutions are transforming the way we work and live. Employees are able to keep in touch with their e-mail, calendar and employer from mobile devices, but on the other hands they introduced a new security threats appeared. While an attacker needs physical access to a wired network in order to gain access to the network and to accomplish his goals, a wireless network allows anyone within its range to passively monitor the traffic or even start an attack,one of the countermeasures that can be used is the intrusion detection systems in order to allow us to know both the threats affecting our wireless network and our system vulnerabilities in order to prevent those attackers, the IDS its main purpose is to manage the system and its operations and Its duty depends on .